{"id":15772,"date":"2026-03-27T21:20:16","date_gmt":"2026-03-27T13:20:16","guid":{"rendered":"https:\/\/zetarmold.com\/?p=15772"},"modified":"2026-04-27T14:11:07","modified_gmt":"2026-04-27T06:11:07","slug":"materiau-pour-moules-dinjection","status":"publish","type":"post","link":"https:\/\/zetarmold.com\/fr\/materiau-pour-moules-dinjection\/","title":{"rendered":"L'autre force du H13 est sa r\u00e9sistance \u00e0 la fatigue thermique. La temp\u00e9rature de moulage pour le PPS, le PEI (Ultem) et le LCP d\u00e9passe souvent 300\u00b0C. \u00c0 ces temp\u00e9ratures, les cycles thermiques r\u00e9p\u00e9t\u00e9s d'injection et de refroidissement peuvent fissurer un acier plus mou au niveau des nervures minces ou des rayons d'angle vifs en moins de 200 000 cycles. La teneur \u00e9lev\u00e9e en chrome et en molybd\u00e8ne du H13 r\u00e9duit la variation du coefficient de dilatation thermique, lui conf\u00e9rant une dur\u00e9e de vie en fatigue thermique environ 3 fois sup\u00e9rieure \u00e0 celle du P20 dans des conditions identiques. Dans notre usine, nous utilisons le H13 pour tout moule o\u00f9 la temp\u00e9rature de fusion d\u00e9passe 280\u00b0C ou la teneur en fibres de verre est sup\u00e9rieure \u00e0 15%."},"content":{"rendered":"<div class=\"callout-key\" style=\"background:#f0f7ff; border-left:4px solid #2563eb; padding:1em 1.2em; border-radius:6px; margin:1.5em 0;\">\n<strong>Principaux enseignements<\/strong><\/p>\n<ul>\n<li>P20 (HRC 28\u201333, pre-hardened) is ideal for prototype and medium-volume molds up to 500,000 shots with commodity resins \u2014 lowest tooling cost.<\/li>\n<li>H13 (HRC 48\u201352, heat-treated) handles glass-filled, abrasive, or high-temperature resins (PPS, PEI) and survives more than 1 million shots.<\/li>\n<li>S136 (HRC 48\u201352, stainless) is mandatory for corrosive resins (PVC, POM, flame-retardant ABS) and optical or medical parts requiring mirror-polished surfaces.<\/li>\n<li>Steel grade drives 30\u201340% of tooling cost: upgrading from P20 to S136 typically adds $3,000\u2013$8,000 to a single-cavity mold.<\/li>\n<li>Match steel to three factors: production volume, resin chemistry, and surface finish requirement \u2014 in that priority order.<\/li>\n<\/ul>\n<\/div>\n<h2>Why Mold Steel Selection Decides Your Part Quality and Tooling Cost<\/h2>\n<p>The spec sheet looked fine. The resin was approved. The wall thickness passed <a href=\"https:\/\/zetarmold.com\/fr\/injection-de-pieces-plastiques-dfm\/\">DFM<\/a><sup id=\"fnref1:1\"><a href=\"#fn:1\" class=\"footnote-ref\">1<\/a><\/sup>. But when the first shots came off the press, the surface looked like someone had dragged sandpaper across it. We traced it back to a P20 cavity that had been specified for a 30% glass-filled nylon job. The mold shop had used what they had on the shelf. Three weeks of re-polishing later, the customer had moved to a competitor. That was the last time my team skipped a steel conversation at kickoff.<\/p>\n<p>La plupart des d\u00e9faillances de moules d'injection remontent \u00e0 une inad\u00e9quation entre la nuance d'acier et soit l'abrasivit\u00e9 de la r\u00e9sine, soit son agressivit\u00e9 chimique, soit le volume de production demand\u00e9 au moule. Choisir le mauvais acier n'affecte pas seulement la qualit\u00e9 de surface \u2014 il acc\u00e9l\u00e8re l'usure des plans de joint, obstrue les \u00e9ventails avec des produits de corrosion et peut r\u00e9duire de moiti\u00e9 la dur\u00e9e de vie utile du moule. La diff\u00e9rence de co\u00fbt entre une d\u00e9cision d'acier correcte d\u00e8s le premier coup et une r\u00e9paration de retrofit est typiquement de 3 \u00e0 5 fois le surco\u00fbt initial de l'acier.<\/p>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img decoding=\"async\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-mold-steel-p20-h13-s136-comparison.jpg\" alt=\"P20 H13 S136 &lt;a href=\"https:>acier pour moules<\/a><sup id=\"fnref1:2\"><a href=\"#fn:2\" class=\"footnote-ref\">2<\/a><\/sup> blocs de comparaison \u00bb style=\"max-width:100%;height:auto;\" \/&gt;<figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">P20, H13, S136 steel grades<\/figcaption><\/figure>\n<h2>P20 Mold Steel: Best Choice for Budget and Medium-Volume Production<\/h2>\n<p>P20 is a pre-hardened chromium-molybdenum <a href=\"https:\/\/zetarmold.com\/fr\/materiaux-en-acier-couramment-utilises\/\">tool steel<\/a><sup id=\"fnref1:3\"><a href=\"#fn:3\" class=\"footnote-ref\">3<\/a><\/sup> delivered at HRC 28\u201333, which means you can machine it directly without a heat-treat cycle after roughing. That saves 5\u201310 days on the build schedule and eliminates the distortion risk that comes with post-machining heat treatment. At our factory, we run P20 on roughly 60% of consumer-product tooling where the resin is unfilled ABS, PP, or PE and the annual volume is below 500,000 shots per cavity.<\/p>\n<p>The trade-off is hardness. At HRC 30, P20 will show visible wear on parting lines and gate areas after roughly 300,000\u2013500,000 shots with mildly abrasive resins. For fully unfilled commodity resins, the same tool can reach 800,000\u20131,000,000 shots before requiring a re-polish or gate repair. P20 also accepts textured finishes (EDM grain, VDI 24\u201336) reasonably well, but mirror polishing below VDI 12 is difficult because the lower carbon content limits achievable surface hardness.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<caption style=\"font-weight:bold;margin-bottom:0.5em;\">P20 Mold Steel \u2014 Key Properties at a Glance<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Propri\u00e9t\u00e9<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">P20 Value<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Practical Implication<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Hardness (as-supplied)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">HRC 28\u201333<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">No post-machining heat treat needed<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Tensile strength<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">~1,000 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Good for standard injection pressures up to 1,400 bar<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Max recommended volume<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">500,000\u20131,000,000 shots<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Depends on resin abrasiveness<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Polishability<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">VDI 12\u201318 (satin)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Not suitable for optical or Class A mirror finish<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Faible<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Requires rust preventive in storage; avoid PVC\/POM<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Relative tool cost (single cavity)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.0\u00d7 (baseline)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Most economical steel grade<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>One decision point that catches engineers off guard: P20 is often available in a nitrided variant (P20+Ni or P20H) where the surface is case-hardened to HRC 50\u201355 while the core stays soft. This gives better wear resistance at gates and parting lines without adding a full heat-treat cycle. We specify this variant on P20 tools expected to run 600,000\u2013900,000 shots with lightly filled resins (up to 10% glass fiber).<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u00ab Le P20 peut \u00eatre usin\u00e9 et utilis\u00e9 sans cycle de traitement thermique post-usinage. \u00bb<\/b><span class=\"claim-true-or-false\">Vrai<\/span><\/p>\n<p class=\"claim-explanation\">P20 steel is supplied in a pre-hardened condition at HRC 28\u201333, meaning it is ready to machine and finish without additional heat treatment. This saves 5\u201310 days on tool build time compared to tool steels like H13 or S136 that require vacuum hardening and tempering after machining.<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u00ab L'acier P20 convient au moulage \u00e0 long terme du PVC ou de l'ABS ignifuge. \u00bb<\/b><span class=\"claim-true-or-false\">Faux<\/span><\/p>\n<p class=\"claim-explanation\">This is false. P20 has minimal corrosion resistance and will degrade when exposed to the hydrochloric acid off-gas produced by PVC decomposition or the bromine compounds in flame-retardant ABS. The cavity surface pits within 50,000\u2013100,000 shots, creating surface defects on parts. Stainless mold steel (S136 or 2316) is required for these resins.<\/p>\n<\/div>\n<h2>H13 Tool Steel: The Right Answer for High-Temperature Resins and Abrasive Fills<\/h2>\n<p>H13 is a chromium-molybdenum-vanadium hot-work tool steel that reaches HRC 48\u201352 after vacuum hardening and tempering. The vanadium content forms hard carbides that resist abrasive wear from glass fiber, mineral filler, and carbon fiber reinforcements. When a customer comes to us with a 30% GF nylon 66 part that needs 2 million shots, H13 is almost always the steel we specify \u2014 not because it is the only option, but because it hits the best balance of wear resistance, toughness, and machinability at that volume tier.<\/p>\n<p>L'autre force du H13 est sa r\u00e9sistance \u00e0 la fatigue thermique. La temp\u00e9rature de moulage du PPS, du PEI (Ultem) et du LCP d\u00e9passe souvent 300\u00b0C. \u00c0 ces temp\u00e9ratures, le cyclage thermique r\u00e9p\u00e9t\u00e9 d'injection et de refroidissement peut fissurer un acier plus mou au niveau des nervures fines ou des rayons d'angle vifs en moins de 200 000 cycles. La teneur \u00e9lev\u00e9e en chrome et en molybd\u00e8ne du H13 r\u00e9duit la variation du coefficient de dilatation thermique, lui conf\u00e9rant une dur\u00e9e de vie en fatigue thermique environ 3 fois sup\u00e9rieure \u00e0 celle du P20 dans des conditions identiques. Dans notre usine, nous utilisons du H13 pour tout moule o\u00f9 la temp\u00e9rature de fusion d\u00e9passe 280\u00b0C ou la teneur en fibres de verre est sup\u00e9rieure \u00e0 15 %.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<caption style=\"font-weight:bold;margin-bottom:0.5em;\">Bon (VDI 6\u201312)<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Propri\u00e9t\u00e9<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">H13 Value<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Practical Implication<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Hardness (heat-treated)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">HRC 48\u201352<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">High wear resistance at gate and parting line<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Tensile strength<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">~1,600 MPa<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Handles high injection pressures and clamping forces<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Max recommended volume<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1,000,000\u20132,000,000+ shots<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Ideal for high-volume production with abrasive resins<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Polishability<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">VDI 6\u201312 (semi-gloss)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Good but not optical-grade mirror finish<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Mod\u00e9r\u00e9<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Not suitable for PVC; acceptable for most other resins<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Relative tool cost (single cavity)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.5\u00d7\u20132.0\u00d7 P20<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Higher steel + heat treat cost, lower per-shot maintenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>One practical note from the shop floor: H13 requires a proper stress-relief cycle after rough machining and before final hardening. Skipping this step is the single most common cause of H13 mold cracking we see from tooling shops trying to cut lead time. The stress relief cycle (550\u2013600\u00b0C for 2 hours per 25 mm section thickness) adds 2\u20133 days but prevents distortion during vacuum hardening. We have seen tools crack at rib roots within the first 50,000 shots when this step was skipped \u2014 a $15,000+ repair bill that makes the time saving look absurd.<\/p>\n<div class=\"claim claim-true\" style=\"background-color: #eff7ef; border-color: #eff7ef; color: #5a8a5a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#16a34a\" stroke-width=\"2\"><path d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><b>\u00ab Le H13 est l'acier de moule pr\u00e9f\u00e9r\u00e9 pour les r\u00e9sines charg\u00e9es de fibres de verre au-del\u00e0 d'un taux de 15 %. \u00bb<\/b><span class=\"claim-true-or-false\">Vrai<\/span><\/p>\n<p class=\"claim-explanation\">Le H13 \u00e0 HRC 48\u201352 contient des carbures de vanadium qui r\u00e9sistent \u00e0 l'action abrasive de coupe des fibres de verre contre la surface de la cavit\u00e9. \u00c0 un chargement de 30 % de fibres de verre, les cavit\u00e9s en P20 montrent g\u00e9n\u00e9ralement une usure mesurable (&gt;0,02 mm de profondeur \u00e0 la porte) apr\u00e8s 200 000\u2013300 000 coups, tandis que le H13 maintient la tol\u00e9rance dimensionnelle au-del\u00e0 d'un million de coups dans des conditions identiques. L'avantage de r\u00e9sistance \u00e0 l'usure du H13 sur le P20 augmente proportionnellement avec la teneur en charge et la vitesse d'injection.<\/p>\n<\/div>\n<div class=\"claim claim-false\" style=\"background-color: #f7e8e8; border-color: #f7e8e8; color: #8a4a4a;\">\n<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20\" height=\"20\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#dc2626\" stroke-width=\"2\"><line x1=\"18\" y1=\"6\" x2=\"6\" y2=\"18\"\/><line x1=\"6\" y1=\"6\" x2=\"18\" y2=\"18\"\/><\/svg><b>\u00ab Le H13 et le S136 ont la m\u00eame duret\u00e9 et peuvent \u00eatre utilis\u00e9s de mani\u00e8re interchangeable. \u00bb<\/b><span class=\"claim-true-or-false\">Faux<\/span><\/p>\n<p class=\"claim-explanation\">While both H13 and S136 are heat-treated to HRC 48\u201352, they are engineered for different failure modes. H13 is a hot-work steel optimized for thermal fatigue and abrasive wear resistance, containing 5% chromium and 1% molybdenum plus vanadium. S136 is a stainless tool steel with 13% chromium for corrosion resistance and superior polishability. Substituting H13 where S136 is required \u2014 such as in PVC or transparent part molds \u2014 will result in corrosion pitting and surface defects.<\/p>\n<\/div>\n<h2>S136 Stainless Mold Steel: Mandatory for Corrosive Resins and Optical Surfaces<\/h2>\n<p>S136 (equivalent to AISI 420 modified stainless steel) contains approximately 13% chromium, which provides passive oxide layer corrosion protection against acidic off-gases from PVC, halogenated flame retardants, POM (acetal), and some polyurethanes. The corrosion resistance is not just cosmetic \u2014 acid attack on a cavity surface creates micro-pitting that transfers directly to the part surface, generating defects that cannot be polished out without re-machining the cavity.<\/p>\n<p>S136 also achieves the highest polishability of any common mold steel, reaching VDI 0\u20133 (mirror finish, Ra 0.01\u20130.02 \u00b5m) when processed correctly. This is essential for optical lenses, light guides, medical device housings, and any part requiring Class A cosmetic transparency. At our factory, we use S136 exclusively for all medical device tooling, transparent PC and PMMA parts, and any application involving PVC or POM resins. The mirror-polish surface on an S136 cavity can be maintained for 500,000\u20131,000,000 shots with proper mold release and cleaning protocols.<\/p>\n<figure style=\"text-align:center;margin:2em 0;\">\n<img decoding=\"async\" src=\"https:\/\/zetarmold.com\/wp-content\/uploads\/2026\/03\/injection-mold-steel-cavity-selection.jpg\" alt=\"Injection mold steel cavity selection process\" style=\"max-width:100%;height:auto;\" \/><figcaption style=\"font-size:0.78em; color:#888; font-style:italic; margin-top:4px; text-align:center;\">Polished mold cavity steel block<\/figcaption><\/figure>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<caption style=\"font-weight:bold;margin-bottom:0.5em;\">S136 Stainless Mold Steel \u2014 Key Properties at a Glance<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Propri\u00e9t\u00e9<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">S136 Value<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Practical Implication<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Hardness (heat-treated)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">HRC 48\u201352<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Same hardness as H13, better corrosion resistance<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Chromium content<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">~13%<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Passive oxide layer resists acid off-gas from PVC, POM, FR-ABS<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Max polishability<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">VDI 0\u20133 (mirror, Ra 0.01 \u00b5m)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Required for optical lenses, light guides, transparent housings<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">High (stainless)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Suitable for PVC, POM, medical-grade resins<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Max recommended volume<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">500,000\u20131,000,000 shots<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Slightly lower toughness than H13 at high cycle counts<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Relative tool cost (single cavity)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">2.0\u00d7\u20132.8\u00d7 P20<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Highest material cost; offset by lower surface repair frequency<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The trade-off with S136 is toughness. It is slightly more brittle than H13 at the same hardness level, which means it is more susceptible to chipping at thin rib edges (below 0.5 mm) or in deep narrow slots. We design S136 molds with a minimum rib-to-depth ratio of 1:6 (rib thickness:depth) and add a 0.3 mm radius on all internal sharp corners. These design changes add 2\u20134 hours of machining time but prevent brittle failure in service. For the <a href=\"https:\/\/zetarmold.com\/fr\/conception-de-moules-dinjection\/\"><a href=\"https:\/\/zetarmold.com\/fr\/injection-mold-complete-guide\/\">conception de moules d'injection<\/a><\/a><sup id=\"fnref1:4\"><a href=\"#fn:4\" class=\"footnote-ref\">4<\/a><\/sup> team, this is a critical DFM checkpoint.<\/p>\n<h2>Steel Grade Comparison: P20 vs H13 vs S136 Side by Side<\/h2>\n<p>When engineers ask us which steel to use, the answer almost always comes down to three questions in this order: How many shots? What resin? What surface finish? The table below codifies our 20 years of factory experience into a direct comparison. Notice that no single grade is universally superior \u2014 each occupies a distinct operational niche.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<caption style=\"font-weight:bold;margin-bottom:0.5em;\">P20 vs H13 vs S136 \u2014 Complete Comparison Matrix<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Criterion<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">P20<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">H13<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">S136<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Duret\u00e9 (HRC)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">28\u201333 (pre-hardened)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">48\u201352 (heat-treated)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">48\u201352 (heat-treated)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Best for volume<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Up to 500K shots<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">500K\u20132M+ shots<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Up to 1M shots<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Abrasion resistance<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Low\u2013Medium<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Haut<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Medium\u2013High<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Faible<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Mod\u00e9r\u00e9<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">High (stainless)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Mirror polishability<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Medium (VDI 12\u201318)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Good (VDI 6\u201312)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">L'acier \u00e0 outils est une cat\u00e9gorie d'acier au carbone et d'acier alli\u00e9 sp\u00e9cifiquement formul\u00e9e pour la fabrication d'outils de coupe et de formage, y compris les cavit\u00e9s de moules d'injection, mesur\u00e9e en duret\u00e9 sur l'\u00e9chelle Rockwell C (HRC), allant g\u00e9n\u00e9ralement de HRC 28 \u00e0 HRC 65 selon l'application.<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Thermal fatigue life<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Bon<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Excellent<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Bon<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Recommended resins<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">ABS, PP, PE, PS (unfilled)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">GF Nylon, PPS, PEI, LCP, PC<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">PVC, POM, FR-ABS, PMMA, optical PC<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Post-machining heat treat<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Not required<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Required (vacuum)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Required (vacuum)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Lead time impact<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Shortest (+0 days)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Moderate (+5\u201310 days)<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Moderate (+5\u201310 days)<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">Relative cost index<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.0\u00d7<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">1.5\u00d7\u20132.0\u00d7<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">2.0\u00d7\u20132.8\u00d7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Un pi\u00e8ge courant : les ing\u00e9nieurs voient que le H13 et le S136 ont la m\u00eame plage de HRC et concluent qu'ils sont interchangeables. Ce n'est pas le cas. Les carbures de vanadium du H13 le rendent sup\u00e9rieur contre l'usure abrasive ; les 13 % de chrome du S136 le rendent immunis\u00e9 contre les attaques corrosives. Utiliser du PVC dans un moule H13 produira une corrosion par piq\u00fbres en moins de 50 000 coups. Utiliser du nylon charg\u00e9 \u00e0 40 % de fibres de verre dans un moule S136 causera une usure acc\u00e9l\u00e9r\u00e9e de la surface car le S136 manque de la phase de carbure de vanadium qui donne au H13 son avantage abrasif.<\/p>\n<h2>How to Select Mold Steel in 3 Steps: A Practical Decision Framework<\/h2>\n<h3>Step 1: Qualify the Resin Chemistry<\/h3>\n<p>Le premier filtre est toujours la chimie. V\u00e9rifiez la fiche technique de la r\u00e9sine pour les produits d\u00e9gag\u00e9s, la temp\u00e9rature de traitement recommand\u00e9e et tout avertissement de corrosion. Le PVC, les retardateurs de flamme contenant des halog\u00e8nes, l'ac\u00e9tal (POM) et les r\u00e9sines techniques absorbant l'humidit\u00e9 qui se d\u00e9composent \u00e0 haute temp\u00e9rature produisent tous des acides lors du traitement. Toute r\u00e9sine qui g\u00e9n\u00e8re du HCl, HBr, HF ou d\u00e9gage du formald\u00e9hyde pendant un traitement normal n\u00e9cessite de l'acier inoxydable S136 ou au minimum 2316. Aucune exception \u2014 nous n'avons jamais vu de P20 ou H13 survivre \u00e0 200 000 coups dans une application PVC sans piq\u00fbres visibles dans la cavit\u00e9.<\/p>\n<p>For optical or medical applications, even if the resin is not chemically aggressive, the surface finish requirement drives you to S136. Polycarbonate for light guides, PMMA for lenses, and COC\/COP for medical vials all require Ra values below 0.025 \u00b5m \u2014 a level only achievable with S136 and a skilled polisher with 6\u20138 hours on the cavity surface.<\/p>\n<h3>Step 2: Establish the Production Volume Target<\/h3>\n<p>Volume defines how much wear resistance you need to pay for. If the program is a bridge tool for 50,000\u2013100,000 shots while the production tool is being built, P20 is almost always the right call \u2014 the savings on tooling cost fund the production tool. If the program is 3 million shots over 5 years, H13 or S136 is not optional: rebuilding a P20 mold at 500,000 shots would cost more in downtime and re-tooling than the original price differential. At our factory, the break-even calculation for upgrading from P20 to H13 generally favors H13 at annual volumes above 250,000 shots per cavity for abrasive resins.<\/p>\n<h3>Step 3: Match Surface Finish to Steel Grade<\/h3>\n<p>Les exigences de finition de surface d\u00e9coulent directement de la sp\u00e9cification de la pi\u00e8ce. SPI A1\/A2 (miroir) n\u00e9cessite du S136. SPI B1 (semi-brillant) peut utiliser du H13. SPI C1\/C2 (mat) peut utiliser du P20. Lorsque le dessin de la pi\u00e8ce demande un 'brillant tel que moul\u00e9' sans pr\u00e9ciser le grade SPI, demandez des \u00e9claircissements avant de citer l'acier \u2014 la diff\u00e9rence entre une sp\u00e9cification vague 'brillante' et une sp\u00e9cification SPI A1 peut ajouter $4 000 \u00e0 $6 000 au co\u00fbt d'un outil \u00e0 cavit\u00e9 unique. Dans nos revues de DFM, nous confirmons toujours le grade de finition de surface avant de s\u00e9lectionner l'acier car les clients ne r\u00e9alisent souvent pas que leur exigence de 'pi\u00e8ce brillante' se traduit par un travail de polissage de qualit\u00e9 optique.<\/p>\n<h2>Real-World Cost and Timeline Impact of Steel Grade Choices<\/h2>\n<p>Les chiffres aident \u00e0 r\u00e9gler les d\u00e9bats sur la nuance d'acier plus rapidement que la th\u00e9orie. Voici des donn\u00e9es r\u00e9elles provenant des r\u00e9centes fabrications d'outillage de notre usine, anonymis\u00e9es pour la confidentialit\u00e9 client. Ces chiffres repr\u00e9sentent des moules familiaux \u00e0 cavit\u00e9 unique pour pi\u00e8ces grand public et industrielles avec une surface d'environ 150 cm\u00b2 par cavit\u00e9.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:1.5em 0;\">\n<caption style=\"font-weight:bold;margin-bottom:0.5em;\">Tooling Cost vs Steel Grade (Single-Cavity Tool, 150 cm\u00b2 Cavity Area)<\/caption>\n<thead>\n<tr>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Qualit\u00e9 de l'acier<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Material Cost (steel only)<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Total Tool Cost<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">D\u00e9lai d'ex\u00e9cution<\/th>\n<th style=\"border:1px solid #ddd;padding:8px;background:#f5f5f5;\">Recommended For<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">P20<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$400\u2013$800<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$8,000\u2013$15,000<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">4\u20136 weeks<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">Prototype, low-volume, unfilled commodity resins<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">H13<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$800\u2013$1,600<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$12,000\u2013$22,000<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">6\u20138 weeks<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">High-volume, abrasive resins, high-temp engineering plastics<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:8px;\">S136<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$1,200\u2013$2,400<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">$15,000\u2013$28,000<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">6\u20138 weeks<\/td>\n<td style=\"border:1px solid #ddd;padding:8px;\">PVC, POM, optical, medical, FR resins<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The lead time difference reflects both heat treatment scheduling and the additional EDM and polishing work required for H13 and S136. Vacuum hardening furnaces at most tool shops run on a batch schedule \u2014 if your tool misses the weekly run, you add 5\u20137 days. This is why we advise clients to commit to steel grade in the first week of tooling kickoff, not after the mold has been roughed out in whatever steel was on the shelf.<\/p>\n<h2>Frequently Asked Questions About Injection Mold Steel Selection?<\/h2>\n<h3>Quel est le meilleur acier pour moules pour les pi\u00e8ces en plastique transparent ?<\/h3>\n<p>S136 stainless mold steel is the industry standard for transparent injection molded parts. It achieves mirror-polish surface finish (SPI A1\/A2, Ra \u2264 0.025 \u00b5m) required for optical-grade clarity in PC, PMMA, and COC resins. The 13% chromium content also resists staining from mold release agents that could cloud a polished cavity surface. P20 and H13 can reach SPI B1 but cannot sustain the Ra 0.01\u20130.02 \u00b5m values needed for lens or light-guide applications. For medical optical parts, S136H (pre-hardened variant at HRC 38\u201342) provides a faster build schedule while still meeting polishability requirements.<\/p>\n<h3>Puis-je utiliser l'acier P20 pour un moule de production \u00e0 grand volume ?<\/h3>\n<p>P20 can handle production volumes up to 500,000\u20131,000,000 shots for unfilled commodity resins (ABS, PP, PE, PS) at injection pressures below 1,200 bar. Above these volumes, or when running filled resins with more than 10% glass fiber, P20 will develop visible wear at gate areas and parting lines that transfers to parts as flash or dimensional drift. For annual volumes above 500,000 shots per cavity with any abrasive resin, upgrading to H13 typically pays for itself within the first year by eliminating mid-production cavity repairs. Always confirm resin type and annual volume before fixing the steel grade.<\/p>\n<h3>Quel acier pour moule devrais-je utiliser pour le moulage par injection de PVC ?<\/h3>\n<p>PVC <a href=\"https:\/\/zetarmold.com\/fr\/injection-molding-complete-guide\/\">moulage par injection<\/a> n\u00e9cessite de l'acier de moule inoxydable S136 (ou 2316) sans exception. Lors du traitement, le PVC se d\u00e9compose l\u00e9g\u00e8rement et lib\u00e8re du gaz chlorhydrique (HCl), qui attaque les surfaces en acier non inoxydable de la cavit\u00e9 en 50 000 \u00e0 100 000 coups, provoquant une corrosion par piq\u00fbres qui d\u00e9truit la finition de surface et cr\u00e9e des d\u00e9fauts sur les pi\u00e8ces. Les 13 % de chrome du S136 forment une couche d'oxyde passive qui r\u00e9siste \u00e0 l'attaque du HCl. Tous les canaux de refroidissement, les goupilles de noyau et les coulisseaux en contact avec la zone de fusion du PVC doivent \u00e9galement \u00eatre en acier inoxydable ou chrom\u00e9s pour \u00e9viter la corrosion interne. M\u00eame les moules prototypes PVC pour petites s\u00e9ries doivent utiliser du S136 \u2014 les dommages dus au HCl s'accumulent rapidement.<\/p>\n<h3>Comment la duret\u00e9 de l'acier de moule affecte-t-elle la qualit\u00e9 de la finition de surface ?<\/h3>\n<p>Harder steels (HRC 48\u201352, H13 and S136) can be polished to finer surface finishes than softer steels (HRC 28\u201333, P20) because the high carbide content of hardened steels allows the polishing abrasive to produce a uniform, scratch-free surface. P20 at HRC 30 has softer matrix regions that tear during diamond polishing, limiting achievable Ra to approximately 0.05\u20130.10 \u00b5m (SPI B1). S136 at HRC 50 can reach Ra 0.01 \u00b5m (SPI A1) with progressive diamond polishing from 6 \u00b5m down to 0.25 \u00b5m grit. H13 at HRC 50 reaches Ra 0.03\u20130.05 \u00b5m (SPI A2\u2013B1). Hardness also determines how long the polished finish lasts under production conditions.<\/p>\n<h3>Le H13 ou le S136 est-il meilleur pour un moule de dispositif m\u00e9dical ?<\/h3>\n<p>Le S136 est le choix privil\u00e9gi\u00e9 pour les moules de dispositifs m\u00e9dicaux dans la plupart des cas. Les pi\u00e8ces m\u00e9dicales n\u00e9cessitent g\u00e9n\u00e9ralement des surfaces polies miroir pour la nettoyabilit\u00e9 et la conformit\u00e9 aux inspections cosm\u00e9tiques, et de nombreuses r\u00e9sines m\u00e9dicales \u2014 y compris le LDPE pour l'emballage des m\u00e9dicaments, le PC pour les bo\u00eetiers d'appareils et divers polym\u00e8res \u00e0 lib\u00e9ration de principe actif \u2014 peuvent contenir des additifs qui provoquent la corrosion dans les aciers non inoxydables. Le S136 satisfait \u00e0 la fois l'exigence de finition de surface (VDI 0\u20133) et la r\u00e9sistance \u00e0 la corrosion n\u00e9cessaire dans un environnement de production m\u00e9dicale. Le H13 n'est utilis\u00e9 dans l'outillage m\u00e9dical que lorsque la g\u00e9om\u00e9trie de la pi\u00e8ce pr\u00e9sente des nervures fines ou des noyaux profonds o\u00f9 la t\u00e9nacit\u00e9 l\u00e9g\u00e8rement inf\u00e9rieure du S136 cr\u00e9e un risque d'\u00e9caillage, et o\u00f9 la r\u00e9sine n'est pas corrosive.<\/p>\n<hr style=\"margin:2em 0;border:none;border-top:1px solid #e0e0e0;\" \/>\n<ol class=\"footnotes\">\n<li id=\"fn:1\">\n<p><strong>Entreprises de Moulage par Injection en Inde : Pourquoi les Grands Acheteurs Choisissent ZetarMold -<\/strong> DFM (Design for Manufacturability) refers to an engineering review process applied before tooling begins, identifying features in a part design such as thin walls, sharp corners, or insufficient draft that would cause molding defects or increase tool cost. <a href=\"#fnref1:1\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:2\">\n<p><strong>mold steel:<\/strong> Mold steel refers to a category of tool steels used to fabricate injection mold cores and cavities, selected based on hardness (HRC), polishability, corrosion resistance, and thermal fatigue strength for the target production volume and resin type. <a href=\"#fnref1:2\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:3\">\n<p><strong>tool steel:<\/strong> Tool steel is a category of carbon and alloy steel specifically formulated for the manufacture of cutting and forming tools, including injection mold cavities, measured in hardness on the Rockwell C (HRC) scale, typically ranging from HRC 28 to HRC 65 depending on application. <a href=\"#fnref1:3\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<li id=\"fn:4\">\n<p><strong>injection mold design:<\/strong> S\u00e9lection de l'Acier pour Moule d'Injection : Guide P20, H13, S136 <a href=\"#fnref1:4\" class=\"footnote-backref\">\u21a9<\/a><\/p>\n<\/li>\n<\/ol>\n<p><script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What is the best mold steel for transparent plastic parts?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"S136 stainless mold steel is the industry standard for transparent injection molded parts. It achieves mirror-polish surface finish (SPI A1\\\/A2, Ra \\u2264 0.025 \\u00b5m) required for optical-grade clarity in PC, PMMA, and COC resins. The 13% chromium content also resists staining from mold release agents that could cloud a polished cavity surface. P20 and H13 can reach SPI B1 but cannot sustain the Ra 0.01\\u20130.02 \\u00b5m values needed for lens or light-guide applications. For medical optical parts, S136H (pre-har\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use P20 steel for a high-volume production mold?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"P20 can handle production volumes up to 500,000\\u20131,000,000 shots for unfilled commodity resins (ABS, PP, PE, PS) at injection pressures below 1,200 bar. Above these volumes, or when running filled resins with more than 10% glass fiber, P20 will develop visible wear at gate areas and parting lines that transfers to parts as flash or dimensional drift. For annual volumes above 500,000 shots per cavity with any abrasive resin, upgrading to H13 typically pays for itself within the first year by elimi\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What mold steel should I use for PVC injection molding?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"PVC injection molding requires S136 (or 2316) stainless mold steel without exception. During processing, PVC decomposes slightly and releases hydrochloric acid (HCl) gas, which attacks non-stainless cavity steel surfaces within 50,000\\u2013100,000 shots, causing pitting corrosion that destroys surface finish and creates part defects. S136's 13% chromium forms a passive oxide layer that resists HCl attack. All cooling lines, core pins, and slides in contact with the PVC melt zone should also be made f\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How does mold steel hardness affect surface finish quality?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Harder steels (HRC 48\\u201352, H13 and S136) can be polished to finer surface finishes than softer steels (HRC 28\\u201333, P20) because the high carbide content of hardened steels allows the polishing abrasive to produce a uniform, scratch-free surface. P20 at HRC 30 has softer matrix regions that tear during diamond polishing, limiting achievable Ra to approximately 0.05\\u20130.10 \\u00b5m (SPI B1). S136 at HRC 50 can reach Ra 0.01 \\u00b5m (SPI A1) with progressive diamond polishing from 6 \\u00b5m down to 0.25 \\u00b5m grit. H13 a\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is H13 or S136 better for a medical device mold?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"S136 is the preferred choice for medical device molds in most cases. Medical parts typically require mirror-polished surfaces for cleanability and cosmetic inspection compliance, and many medical resins \\u2014 including LDPE for drug packaging, PC for device housings, and various drug-eluting polymers \\u2014 may contain additives that cause corrosion in non-stainless steels. S136 satisfies both the surface finish requirement (VDI 0\\u20133) and corrosion resistance needed in a medical production environment. H1\"\n            }\n        }\n    ]\n}<\/script><\/p>","protected":false},"excerpt":{"rendered":"<p>Principaux points \u00e0 retenir Le P20 (HRC 28\u201333, pr\u00e9-durci) est id\u00e9al pour les moules de prototype et de moyenne s\u00e9rie jusqu'\u00e0 500 000 pi\u00e8ces avec des r\u00e9sines standard \u2014 co\u00fbt d'outillage le plus bas. Le H13 (HRC 48\u201352, trait\u00e9 thermiquement) convient aux r\u00e9sines charg\u00e9es de verre, abrasives ou \u00e0 haute temp\u00e9rature (PPS, PEI) et r\u00e9siste \u00e0 plus d'un million de pi\u00e8ces. Le S136 (HRC 48\u201352, inoxydable) est obligatoire pour les r\u00e9sines corrosives (PVC, POM, ignifug\u00e9es [\u2026]<\/p>","protected":false},"author":1,"featured_media":53140,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Injection Mold Steel Selection: P20, H13, S136 Guide","_seopress_titles_desc":"Choose the right mold steel in 3 steps: P20 (HRC 28\u201333) for budget runs, H13 (HRC 48\u201352) for high-temp resin, S136 (HRC 48\u201352) for corrosive or optical parts.","_seopress_robots_index":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[45],"tags":[88,82,120],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/posts\/15772"}],"collection":[{"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/comments?post=15772"}],"version-history":[{"count":0,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/posts\/15772\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/media\/53140"}],"wp:attachment":[{"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/media?parent=15772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/categories?post=15772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zetarmold.com\/fr\/wp-json\/wp\/v2\/tags?post=15772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}