{"id":21434,"date":"2026-10-09T12:01:17","date_gmt":"2026-10-09T04:01:17","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=21434"},"modified":"2026-10-09T12:01:17","modified_gmt":"2026-10-09T04:01:17","slug":"best-tool-steels-for-die-casting-dies","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/best-tool-steels-for-die-casting-dies\/","title":{"rendered":"Los mejores aceros para herramientas para matrices de fundici\u00f3n a presi\u00f3n"},"content":{"rendered":"\n<style>\n\n:root{\n    --aobo-accent:#2563eb; --aobo-accent-dark:#1e1e2e; --aobo-blue:#0c56d0; --aobo-blue-dark:#073b91;\n    --aobo-text:#333; --aobo-muted:#888; --aobo-border:#e5e7eb; --aobo-border-dark:#ddd;\n    --aobo-stripe:#f7f7f9; --aobo-hover:#e8f0fe; --aobo-radius:8px; --aobo-radius-sm:6px;\n    --aobo-orange:#f59e0b; --aobo-fill:#e9ecef;\n  }\n  *{box-sizing:border-box;}\n  html{-webkit-text-size-adjust:100%;}\n  body{margin:0;background:#fff;color:var(--aobo-text);\n    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!important;text-transform: none !important}@media (max-width: 760px){.entry-content[class] h1{font-size: clamp(22px,6.4vw,min(34px,var(--h1-max,34px))) !important}.entry-content[class] h2{font-size: 25px !important}.entry-content[class] h3{font-size: 20px !important}.entry-content[class] h4{font-size: 17px !important}.entry-content[class] p,.entry-content[class] li{font-size: 16px !important}.entry-content[class] table th,.entry-content[class] table td{font-size: 14px !important;padding: 11px 12px !important}.entry-content[class] .aobo-hero{padding: 30px 22px}.entry-content[class] .aobo-final-cta{padding: 26px 22px}.entry-content[class] .aobo-final-cta .aobo-btn{width: 100%}}\n<\/style>\n<section class=\"aobo-ht-ref ts-props\">\n<div class=\"aobo-wrap\">\n\n<div class=\"ts-hero\">\n<div class=\"ts-hero-top\">\n<div class=\"ts-kicker\"><span><\/span>Tool Steel | Die Casting | Die and Insert Selection<\/div>\n<h1 style=\"--h1-max:38px\">Best Tool Steels for Die-Casting Dies<\/h1>\n<p>The best-recommended tool steel for most aluminum and magnesium die-casting dies is <a href=\"https:\/\/aobosteel.com\/h13-tool-steel\/\">H13 tool steel<\/a>. It offers the best practical balance of hot hardness, toughness, thermal fatigue resistance, erosion resistance, heat-treatment stability, and cost. The grade by grade selection for dies and inserts is in the <a href=\"https:\/\/aobosteel.com\/tool-steel-for-die-casting-dies-inserts\/\">die casting die and insert selection guide<\/a>.<\/p>\n<\/div>\n<\/div>\n\n<div class=\"ts-tool-area\">\n\n<p class=\"ts-p\">For dies that need higher toughness and better resistance to thermal shock, <a href=\"https:\/\/aobosteel.com\/h11-tool-steel\/\">H11<\/a> is a strong alternative. For dies exposed to stronger erosion, abrasion, or washout, H12 may be considered. For brass and copper die casting, standard 5% chromium hot-work steels may soften too quickly, so higher-alloy steels such as <a href=\"https:\/\/aobosteel.com\/h21-tool-steel\/\">H21<\/a>, H19, H14, and H10A are better choices. For zinc, lead, and tin die casting, <a href=\"https:\/\/aobosteel.com\/p20-tool-steel\/\">P20 mold steel<\/a> is often the most economical option because these metals can be cast at lower temperatures. Working guidelines for those dies are in the <a href=\"https:\/\/aobosteel.com\/p20-tool-steel-in-plastic-molds-and-die-casting-applications\/\">P20 tool steel applications<\/a> guide.<\/p>\n\n<p class=\"ts-p\">Use H13 for aluminum and magnesium, P20 for low-temperature applications with zinc, lead, or tin, and H21, H19, H14, or H10A for brass and copper.<\/p>\n\n<h2 class=\"ts-h2\">Recommended Tool Steels by Casting Metal and Failure Risk<\/h2>\n\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\">\n<thead>\n<tr>\n<th>Casting Metal<\/th>\n<th>First Choice<\/th>\n<th>Alternative Choice<\/th>\n<th>Main Failure Risk<\/th>\n<th>Selection Logic<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"ts-grade\">Aluminum<\/td>\n<td class=\"ts-safe\">H13<\/td>\n<td class=\"ts-safe\">H11, H12<\/td>\n<td class=\"ts-safe\">Heat checking, soldering, erosion<\/td>\n<td class=\"ts-safe\">H13 gives the best balance of hot hardness, toughness, and thermal fatigue resistance. H11 improves toughness. H12 improves abrasion and washout resistance.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Magnesium<\/td>\n<td class=\"ts-safe\">H13<\/td>\n<td class=\"ts-safe\">H11, H12<\/td>\n<td class=\"ts-safe\">Thermal fatigue, cracking<\/td>\n<td class=\"ts-safe\">Magnesium die casting has similar tool steel requirements to aluminum die casting.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Zinc<\/td>\n<td class=\"ts-safe\">P20<\/td>\n<td class=\"ts-safe\">H11, H13<\/td>\n<td class=\"ts-safe\">Wear in long production runs<\/td>\n<td class=\"ts-safe\">P20 is economical for short to medium runs. H11 or H13 is better when longer die life is required.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Lead \/ Tin<\/td>\n<td class=\"ts-safe\">P20<\/td>\n<td class=\"ts-safe\">H13 if higher tool life is needed<\/td>\n<td class=\"ts-safe\">Low-temperature wear<\/td>\n<td class=\"ts-safe\">The lower casting temperature does not always require premium hot-work steel.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Brass<\/td>\n<td class=\"ts-safe\">H21<\/td>\n<td class=\"ts-safe\">H19, H14<\/td>\n<td class=\"ts-safe\">High-temperature softening, washout, heat checking<\/td>\n<td class=\"ts-safe\">Tungsten and cobalt alloying improve red hardness and hot wear resistance.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Copper alloys<\/td>\n<td class=\"ts-safe\">H10A<\/td>\n<td class=\"ts-safe\">H19, H21<\/td>\n<td class=\"ts-safe\">Severe thermal stress, hot softening, erosion<\/td>\n<td class=\"ts-safe\">Higher-alloy hot-work steels retain hardness better at elevated temperature.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<p class=\"ts-p\">The choice of steel varies because each casting metal creates different thermal and erosive conditions. Zinc does not create the same thermal demand as aluminum. Aluminum does not create the same high-temperature softening risk as brass or copper. This is why one universal die steel is not the best answer.<\/p>\n\n<h2 class=\"ts-h2\">H13: Standard Choice for Aluminum and Magnesium Die-Casting Dies<\/h2>\n\n<p class=\"ts-p\">H13 is the standard die steel for aluminum and magnesium die casting because it combines hot hardness, toughness, hardenability, and thermal fatigue resistance in one grade. It belongs to the 5% chromium hot-work tool steel family and performs well under repeated heating and cooling cycles.<\/p>\n\n<p class=\"ts-p\">In aluminum die casting, the die surface is subjected to heat checking, molten-aluminum attack, erosion, and soldering. H13 resists these risks better than ordinary alloy steels because it keeps useful strength at elevated temperatures and has enough toughness to reduce cracking. Low-pressure machines fill more slowly and run thinner walls, so the thermal load and erosion balance differs; that case is covered in the <a href=\"https:\/\/aobosteel.com\/selection-of-tool-steel-for-low-pressure-die-casting-dies\/\">low-pressure die casting die steel selection guide<\/a>.<\/p>\n\n<p class=\"ts-p\">For aluminum die-casting dies, H13 is commonly used, with a hardness of around 42\u201348 HRC. Some die components may require higher hardness, but pushing hardness toward 50\u201352 HRC increases the risk of cracking if the die has sharp corners, large section changes, poor cooling balance, or strong thermal shock.<\/p>\n\n<p class=\"ts-p\">H13 is the safest starting choice when the buyer needs a balanced die steel for aluminum or magnesium dies, inserts, and cavity components.<\/p>\n\n<h2 class=\"ts-h2\">H11 and H12: Alternatives When Toughness or Erosion Resistance Matters<\/h2>\n\n<p class=\"ts-p\">H11 and H12 are not replacements for H13 in every die-casting die. They are alternatives when the risk of failure changes.<\/p>\n\n<p class=\"ts-p\">H11 is better when the die needs more toughness. It has lower vanadium than H13, so it usually gives slightly lower high-temperature wear resistance but better ductility and shock resistance. This makes H11 useful for large dies, complex die shapes, and cracking-sensitive designs. It is also suitable for aluminum, magnesium, and zinc die-casting dies when gross cracking or thermal shock is the main concern.<\/p>\n\n<p class=\"ts-p\">H12 is better when erosion, abrasion, or washout becomes more important. It contains tungsten, which improves hot hardness and abrasion resistance compared with H11. This makes H12 useful in applications where molten metal velocity is high or the die surface is subject to stronger washing action.<\/p>\n\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\">\n<thead>\n<tr>\n<th>Steel<\/th>\n<th>Better When<\/th>\n<th>Main Reason<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"ts-grade\">H11<\/td>\n<td class=\"ts-safe\">The die is large, complex, or cracking-sensitive<\/td>\n<td class=\"ts-safe\">Higher toughness and better thermal shock resistance<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H12<\/td>\n<td class=\"ts-safe\">Erosion, abrasion, or washout is more severe<\/td>\n<td class=\"ts-safe\">Tungsten improves hot hardness and wear resistance<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H13<\/td>\n<td class=\"ts-safe\">The application needs the best general balance<\/td>\n<td class=\"ts-safe\">Balanced hot hardness, toughness, and thermal fatigue resistance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<p class=\"ts-p\">For aluminum die casting, H11 and H12 are generally used around 42\u201350 HRC, depending on whether the priority is toughness or wear resistance.<\/p>\n\n<h2 class=\"ts-h2\">H21, H19, H14, and H10A: Better Choices for Brass and Copper Die Casting<\/h2>\n\n<p class=\"ts-p\">Brass and copper die casting require different steel logic from aluminum and magnesium die casting. These metals expose the die to much higher temperatures. Standard H13 may lose hardness too quickly or suffer severe heat checking and washout.<\/p>\n\n<p class=\"ts-p\">For brass and copper, the die steel needs stronger red hardness, better tempering resistance, and better resistance to high-temperature erosion. That is why higher-alloy hot-work steels such as H21, H19, H14, and H10A are recommended.<\/p>\n\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\">\n<thead>\n<tr>\n<th>Steel<\/th>\n<th>Main Feature<\/th>\n<th>Best Use Logic<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"ts-grade\">H21<\/td>\n<td class=\"ts-safe\">High tungsten content<\/td>\n<td class=\"ts-safe\">Good resistance to high-temperature softening and brass washout<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H19<\/td>\n<td class=\"ts-safe\">Tungsten plus cobalt<\/td>\n<td class=\"ts-safe\">Better high-temperature strength, wear resistance, and heat-checking resistance<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H14<\/td>\n<td class=\"ts-safe\">Chromium plus tungsten<\/td>\n<td class=\"ts-safe\">Better hot hardness than standard 5% chromium grades<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H10A<\/td>\n<td class=\"ts-safe\">Molybdenum and vanadium balance<\/td>\n<td class=\"ts-safe\">Good hardness retention under high thermal stress, especially in copper casting<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<p class=\"ts-p\">H21 is a common choice for brass die-casting dies because tungsten helps the steel resist softening and washout. A typical working hardness for brass die-casting applications is about 38\u201342 HRC. H19 may be used when the die needs stronger resistance to heat checking and high-temperature wear. A typical working hardness for H19 in brass applications is about 38\u201344 HRC.<\/p>\n\n<p class=\"ts-p\">These steels need careful use. High-tungsten steels can resist high heat, but they usually have lower toughness than H13 or H11. They require proper preheating and controlled cooling. Aggressive cooling can increase cracking risk.<\/p>\n\n<h2 class=\"ts-h2\">P20: Economical Choice for Zinc and Low-Temperature Die Casting<\/h2>\n\n<p class=\"ts-p\">P20 is suitable for zinc, lead, tin, and other low-temperature die-casting applications because these metals do not create the same thermal demand as aluminum, brass, or copper. P20 is usually supplied in a pre-hardened condition, which reduces machining costs and avoids distortion caused by final hardening after cavity machining.<\/p>\n\n<p class=\"ts-p\">P20 is commonly supplied around 28\u201332 HRC, approximately 300 HB. This hardness is sufficient for many short- to medium-length zinc die-casting runs. The main advantage is not maximum hot hardness. The main advantages are economical production, good machinability, and stable size after machining.<\/p>\n\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\">\n<thead>\n<tr>\n<th>Use Condition<\/th>\n<th>Recommended Choice<\/th>\n<th>Reason<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"ts-grade\">Short to medium zinc die-casting runs<\/td>\n<td class=\"ts-safe\">P20<\/td>\n<td class=\"ts-safe\">Lower cost, good machinability, no final hardening distortion<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Long zinc die-casting runs<\/td>\n<td class=\"ts-safe\">H11 or H13<\/td>\n<td class=\"ts-safe\">Better wear resistance and longer die life<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Lead or tin die casting<\/td>\n<td class=\"ts-safe\">P20<\/td>\n<td class=\"ts-safe\">Low casting temperature and lower thermal demand<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<p class=\"ts-p\">P20 should not be presented as equal to H13 for severe aluminum die-casting cavities. Its main value is low-temperature casting and cost control.<\/p>\n\n<h2 class=\"ts-h2\">Quick Checklist for Choosing Die-Casting Die Steel<\/h2>\n\n<p class=\"ts-p\">Before selecting tool steel for a die-casting die, first check the casting metal, production volume, and the main failure risk.<\/p>\n\n<div class=\"ts-table-wrap\">\n<table class=\"ts-table\">\n<thead>\n<tr>\n<th>Selection Point<\/th>\n<th>Practical Recommendation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"ts-grade\">Aluminum or magnesium die casting<\/td>\n<td class=\"ts-safe\">Start with H13 at about 42\u201348 HRC. Use H11 if cracking risk is higher. Use H12 if erosion or washout is more severe.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Zinc, lead, or tin die casting<\/td>\n<td class=\"ts-safe\">Use P20 for short to medium runs. Upgrade to H11 or H13 when production volume or wear demand increases.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">Brass or copper die casting<\/td>\n<td class=\"ts-safe\">Use H21, H19, H14, or H10A. These steels offer stronger red hardness and better resistance to high-temperature softening.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H13 hardness selection<\/td>\n<td class=\"ts-safe\">Do not push hardness too high without considering die geometry, cooling balance, and cracking risk.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">H21 or H19 use<\/td>\n<td class=\"ts-safe\">Preheat carefully and avoid aggressive thermal shock. High hot hardness usually comes with lower shock resistance.<\/td>\n<\/tr>\n<tr>\n<td class=\"ts-grade\">P20 selection<\/td>\n<td class=\"ts-safe\">Use it for low-temperature and cost-sensitive dies, not for severe aluminum, brass, or copper die-casting cavities.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<p class=\"ts-p\">A good die-casting die steel choice should specify the grade and explain the working conditions it is suited for. For most aluminum and magnesium dies, H13 remains the safest starting point. For low-temperature zinc die casting, P20 can reduce costs. For brass and copper dies, higher-alloy hot-work steels are usually necessary.<\/p>\n\n<h2 class=\"ts-h2\">Where to go next<\/h2>\n\n<p class=\"ts-p\">Related selection pages on this site: <a href=\"https:\/\/aobosteel.com\/p20-tool-steel\/\">P20 Tool Steel | 1.2311 | 3Cr2Mo<\/a>; <a href=\"https:\/\/aobosteel.com\/selection-of-tool-steel-for-high-pressure-die-casting-dies\/\">HPDC Tool Steel Selection Guide | H13 H11 Supplier | Aobo Steel<\/a>; <a href=\"https:\/\/aobosteel.com\/selection-of-tool-steels-for-die-casting-dies\/\">Die Casting Tool Steel Selection Guide | H13 H11 H21 Supplier | Aobo Steel<\/a>; <a href=\"https:\/\/aobosteel.com\/selection-of-tool-steel-for-copper-and-brass-extrusion\/\">Copper &amp; Brass Extrusion Tool Steel Selection | H21 H26 Supplier<\/a>; <a href=\"https:\/\/aobosteel.com\/selection-of-tool-steel-for-die-casting-cores-and-inserts\/\">Die Casting Tool Steel Selection Guide for Cores &amp; Inserts | Bulk Supply<\/a>.<\/p>\n\n<div class=\"ts-disclaimer\">\n<h3>Before you use this as a die steel specification<\/h3>\n<p>This page is a selection summary for buyers, not an Aobo Steel specification. Working hardness and grade choice also depend on the tool design, the press, the material being formed and the heat treatment, and the final grade for a job is confirmed with the steel and the tool maker together.<\/p>\n<\/div>\n\n<div class=\"aobo-final-cta\">\n<div>\n<h2>Need tool steel for die-casting dies?<\/h2>\n<p>Send the grade, size, quantity, casting or sheet material and the tool this steel goes into. Aobo Steel supplies hot-work and cold-work tool steel in round bar and plate.<\/p>\n<\/div>\n<a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Send Inquiry<\/a>\n<\/div>\n\n<\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>Tool Steel | Die Casting | Die and Insert Selection Best Tool Steels for Die-Casting Dies The best-recommended tool steel for most aluminum and magnesium die-casting dies is H13 tool steel. It offers the best practical balance of hot hardness, toughness, thermal fatigue resistance, erosion resistance, heat-treatment stability, and cost. The grade by grade selection [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-21434","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.6 (Yoast SEO v28.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Best Tool Steels for Die-Casting Dies - AoboSteel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/es\/best-tool-steels-for-die-casting-dies\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Best Tool Steels for Die-Casting Dies\" \/>\n<meta property=\"og:description\" content=\"Tool Steel | Die Casting | Die and Insert Selection Best Tool Steels for Die-Casting Dies The best-recommended tool steel for most aluminum and magnesium die-casting dies is H13 tool steel. 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