{"id":9467,"date":"2025-08-04T09:58:35","date_gmt":"2025-08-04T01:58:35","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9467"},"modified":"2026-04-17T19:41:01","modified_gmt":"2026-04-17T11:41:01","slug":"d3-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/d3-tool-steel\/","title":{"rendered":"D3 Tool Steel | 1.2080 | SKD1"},"content":{"rendered":"<div class=\"wp-block-cover alignfull\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"337\" class=\"wp-block-cover__image-background wp-image-7233 size-large\" alt=\"\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp\" data-object-fit=\"cover\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1024x337.webp 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-300x99.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-768x253.webp 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-1536x506.webp 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3-18x6.webp 18w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/05\/banner3.webp 1920w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim\" style=\"background-color:#4e4b40\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div class=\"wp-block-uagb-container uagb-block-29fc5c3c alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-advanced-heading uagb-block-c196a237\"><h6 class=\"uagb-heading-text\"><a href=\"https:\/\/aobosteel.com\/ko\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">Home<\/mark> <\/a>&gt; <a href=\"https:\/\/aobosteel.com\/ko\/tool-steels\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">Tool Steel Catalog<\/mark><u> <\/u><\/a>&gt; D3 Tool Steel<\/h6><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-d1ce38c5\"><h5 class=\"uagb-heading-text\"><em>Aobo Steel | Global Tool Steel Supplier in China<\/em><\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-5b6189ba\"><h2 class=\"uagb-heading-text\">D3 Tool Steel (AISI D3 \/ 1.2080 \/ SKD1) High Carbon High Chromium Cold Work Tool Steel for Bulk Supply<\/h2><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-914bcd03\"><h5 class=\"uagb-heading-text\">\u2713100% UT Tested Quality Assurance<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-84cd4af9\"><h5 class=\"uagb-heading-text\">\u2713SEP 1921-82 Class D\/d Guaranteed<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-20e20150\"><h5 class=\"uagb-heading-text\">\u2713Annealed State Delivery<\/h5><\/div>\n\n\n\n<div class=\"wp-block-uagb-advanced-heading uagb-block-33ee52f8\"><h5 class=\"uagb-heading-text\">\u2713Surface: Black Scale, Turned, Mill Finish, or Polished<\/h5><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Quick Inquiry For D3 Material<\/a><\/div>\n\n\n\n<div class=\"wp-block-button hs-cta-trigger-button hs-cta-trigger-button-230288465624 is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-ast-global-color-4-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/aobosteel.com\/ko\/distributors\/\" style=\"background-color:#ffffff00\">Explore Our Distributor Supply Structure<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-b1751692 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<p class=\"wp-block-paragraph\">D3 tool steel (AISI D3) is a high-carbon, high-chromium cold work tool steel known for its exceptional wear resistance and dimensional stability. It is designated as DIN 1.2080 (W-Nr. 1.2080), JIS SKD1, ASTM T30403, and is commonly referred to as Cr12 in China. These equivalent grades share similar chemical composition and performance characteristics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At Aobo Steel, D3 is supplied in an annealed condition for bulk industrial use, with ultrasonic testing in accordance with SEP 1921-82 and full MTC documentation per order.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-02969785 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-8d34a8d1 alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-d3-tool-steel-supply-overview\">D3 Tool Steel Supply Overview<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Item<\/th><th>Details<\/th><\/tr><\/thead><tbody><tr><td>Grade<\/td><td>AISI D3 \/ DIN 1.2080 \/ JIS SKD1 \/ Cr12<\/td><\/tr><tr><td>Delivery Condition<\/td><td>Fully Annealed (Soft Machining Condition)<\/td><\/tr><tr><td>Available Forms<\/td><td>Round Bar \/ Flat Bar \/ Plate \/ Forged Block<\/td><\/tr><tr><td>Monthly Supply Capacity<\/td><td>Approx. 800\u20131200 metric tons<\/td><\/tr><tr><td>Recommended Export Quantity<\/td><td>Full 20GP container (~26 tons)<\/td><\/tr><tr><td>MOQ<\/td><td>5 tons (Mixed sizes supported)<\/td><\/tr><tr><td>Lead Time (Ingot Stock)<\/td><td>Approx. 20 days<\/td><\/tr><tr><td>Lead Time (Fresh Melt)<\/td><td>30\u201345 days<\/td><\/tr><tr><td>Lead Time (ESR Grade)<\/td><td>Approx. 60 days<\/td><\/tr><tr><td>Inspection<\/td><td>100% UT Tested (SEP 1921-82 Class D\/d)<\/td><\/tr><tr><td>Documentation<\/td><td>MTC EN 10204 3.1 + UT Report per order<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-production-stability\">Production Stability<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stable monthly output with controlled alloy sourcing<\/li>\n\n\n\n<li>High chromium cold work production focus<\/li>\n\n\n\n<li>ESR (Electro-Slag Remelting) grade available upon request<\/li>\n\n\n\n<li>Full batch traceability linked to the original heat number<\/li>\n\n\n\n<li>Optimized forging reduction ratio for carbide distribution control<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Forging and slow-cooling procedures are controlled to minimize carbide segregation typical of high-carbon, high-chromium grades.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Request a D3 Bulk Supply Quote<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1024x576.avif\" alt=\"\" class=\"wp-image-12933\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1024x576.avif 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-300x169.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-768x432.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-1536x864.avif 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016-18x10.avif 18w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/IMG_20171115_153016.avif 1860w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"750\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2.avif\" alt=\"\" class=\"wp-image-12935\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2.avif 1000w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-300x225.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-768x576.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/02\/photobank-2-16x12.avif 16w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-center\" id=\"h-packaging-and-shipping\">Packaging and Shipping<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Professional seaworthy export packing<\/li>\n\n\n\n<li>20GP container loading optimized up to ~26 tons<\/li>\n\n\n\n<li>Mixed grades and mixed sizes allowed within one container<\/li>\n\n\n\n<li>Anti-rust oil protection for long sea transit<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">International shipments are structured around full container loading to ensure cost efficiency and smoother customs clearance.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-3e41869c wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 hs-cta-trigger-button hs-cta-trigger-button-230288465624\"><a class=\"wp-block-button__link wp-element-button\">Get a D3 Tool Steel Full Container (FCL) Quote<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-c25d577a alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-aisi-d3-din-1-2080-jis-skd1-gallery\">AISI D3 \/ DIN 1.2080\/ JIS SKD1 Gallery<\/h2>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" data-id=\"4761\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/D3.avif\" alt=\"D3 TOOL STEEL\" class=\"wp-image-4761\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/D3.avif 500w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/D3-300x300.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/D3-150x150.avif 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/D3-12x12.avif 12w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"960\" height=\"960\" data-id=\"3123\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3.webp\" alt=\"COLD WORK TOOL STEEL D3\" class=\"wp-image-3123\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3.webp 960w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3-300x300.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3-150x150.webp 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3-768x768.webp 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/02\/COLD-WORK-TOOL-STEEL-D3-12x12.webp 12w\" sizes=\"auto, (max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"1000\" data-id=\"2227\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock.jpg\" alt=\"1.2080 tool steel\" class=\"wp-image-2227\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock.jpg 1000w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock-300x300.jpg 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock-150x150.jpg 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock-768x768.jpg 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/01\/1.2080-tools-steel-plates-stock-12x12.jpg 12w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n<\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-ceb3889d alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"1-eael-table-of-content\">Applications<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Highly stressed cutting and punching tools for thin sheets<\/li>\n\n\n\n<li>Blanking and forming dies<\/li>\n\n\n\n<li>Forming rolls<\/li>\n\n\n\n<li>Drawing and deep drawing tools<\/li>\n\n\n\n<li>Slitting knives\/cutters and shear blades for cutting<\/li>\n\n\n\n<li>Stone processing tools<\/li>\n\n\n\n<li>Knives for paper and plastics<\/li>\n\n\n\n<li>Pressure pads<\/li>\n\n\n\n<li>Thermosetting plastic molding<\/li>\n\n\n\n<li>Spindles, hobs, master tools, thread gauges, spinning tools, extrusion dies, intricate punches, and plungers.<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-af04e4dc alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"2-eael-table-of-content\">D3 and its equivalent grades\u2019 Composition <\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>C<\/td><td>Cr<\/td><td>Mo<\/td><td>V<\/td><td>Mn<\/td><td>&nbsp;Si<\/td><td>P<\/td><td>&nbsp;S<\/td><\/tr><tr><td>2.00 \u2013 2.35%<\/td><td>11.00 \u2013 13.50%<\/td><td>\u2264 0.40%<\/td><td>\u2264 0.35%<\/td><td>\u2264 0.60%<\/td><td>\u2264 0.60%<\/td><td>\u2264 0.03%<\/td><td>\u2264 0.03%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The equivalent grades\u2019 composition<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><\/td><td>Carbon (C)<\/td><td>Silicon (Si)<\/td><td>Manganese (Mn)<\/td><td>Chromium (Cr)<\/td><td>Phosphorus (P)<\/td><td>Sulfur (S)<\/td><\/tr><tr><td>Germany\/W-Nr. 1.2080(X210Cr12)<\/td><td>1.90 &#8211; 2.20<\/td><td>0.10 &#8211; 0.60<\/td><td>0.20 &#8211; 0.60<\/td><td>11.0 &#8211; 13.0<\/td><td>\u2264 0.030<\/td><td>\u2264 0.030<\/td><\/tr><tr><td>Japan JIS SKD1<\/td><td>1.90 &#8211; 2.20<\/td><td>0.10 &#8211; 0.60<\/td><td>0.20 &#8211; 0.60<\/td><td>11.0 &#8211; 13.0<\/td><td>\u2264 0.030<\/td><td>\u2264 0.030<\/td><\/tr><tr><td>China GB Cr12<\/td><td>2.00 &#8211; 2.30<\/td><td>\u2264 0.40<\/td><td>\u2264 0.40<\/td><td>11.50 &#8211; 13.00<\/td><td>\u2264 0.030<\/td><td>\u2264 0.030<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><em>We guarantee that all materials are manufactured in strict compliance with the specified chemical compositions for AISI D3, DIN 1.2080, and JIS SKD1.<\/em><\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-1a53334c alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"3-eael-table-of-content\">D3 Tool Steel Properties<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"4-eael-table-of-content\">Mechanical Properties<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Impact Toughness<\/td><td>Hardness <\/td><td>Hardness (After Quenching)<\/td><td>Poisson\u2019s Ratio<\/td><td>Modulus of Elasticity<\/td><td>Tensile Strength (UTS)<\/td><td>Yield Strength<\/td><\/tr><tr><td>28 J\/cm\u00b2<\/td><td>57\u201358 HRC<\/td><td>64.5 HRC<\/td><td>0.27\u20130.30<\/td><td>190\u2013210 GPa (30 x 10^6 psi)<\/td><td>770\u20132050 MPa<\/td><td>480\u20131550 MPa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"5-eael-table-of-content\">Physical Properties<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Density<\/td><td>Melting Point<\/td><td>Thermal Conductivity<\/td><td>Coefficient of Thermal Expansion<\/td><td>Electrical Resistivity<\/td><\/tr><tr><td>7.7\u22127.87\u00d71000 kg\/m\u00b3 (0.278\u22120.284 lb\/in\u00b3)<\/td><td>1421\u22121430\u2103 (2590\u00b0F)<\/td><td>16.6 W\/(m*K) at 20\u2103<\/td><td>10.7\u221213.3\u00d710\u22126 m\/(m*K) (20\u2212700\u2218\u00b0C)<\/td><td>54.8 uOhm-cm at 21\u2103<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-6dc8075d alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<h2 class=\"wp-block-heading\" id=\"h-heat-treatment-overview\">Heat Treatment Overview<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">D3 tool steel is a high-carbon, high-chromium cold work steel that requires controlled heat treatment to achieve optimal wear resistance and dimensional stability. Due to its high carbide content and relatively low thermal conductivity, careful heating and cooling procedures are essential to prevent cracking and excessive retained austenite.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Preheating: 650\u2013705\u00b0C (1200\u20131300\u00b0F)<\/li>\n\n\n\n<li>Austenitizing (Hardening): 940\u2013960\u00b0C (1725\u20131760\u00b0F)<\/li>\n\n\n\n<li>Quenching: Oil quench recommended<\/li>\n\n\n\n<li>Tempering: Double or triple tempering recommended<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Oil quenching is commonly used for D3 to reduce the risk of cracking compared to water quenching. Immediate tempering after quenching is essential due to the high hardness and brittleness of the as-quenched structure.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-\">Because of its high carbon content, D3 may retain austenite after quenching. For applications requiring maximum dimensional stability, sub-zero treatment can be considered before final tempering.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For a complete step-by-step hardening and tempering guide, including hardness curves and metallurgical considerations, please refer to: <a href=\"https:\/\/aobosteel.com\/ko\/d3-tool-steel-heat-treatment\/\">D3 Tool Steel Heat Treatment Guide<\/a><\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100\"><a class=\"wp-block-button__link wp-element-button\">Open RFQ Form<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\\\/\",\n    \"@type\": \"Product\",\n    \"name\": \"Forged D3 \\\/ 1.2080 \\\/ SKD1 Tool Steel Round Bar\",\n    \"image\": \"https:\\\/\\\/aobosteel.com\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/D3.avif\",\n    \"description\": \"High-quality Forged D3 (1.2080 \\\/ SKD1) Cold Work Tool Steel directly from Aobo Steel factory. High carbon high chromium steel with excellent wear resistance. Custom forged sizes available. 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