{"id":13462,"date":"2026-03-11T11:10:58","date_gmt":"2026-03-11T03:10:58","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=13462"},"modified":"2026-05-06T09:42:44","modified_gmt":"2026-05-06T01:42:44","slug":"d2-steel-composition","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/d2-steel-composition\/","title":{"rendered":"D2 Steel Chemical Composition: Aobo Steel Gives the Definitive Answer"},"content":{"rendered":"
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Composi\u00e7\u00e3o qu\u00edmica do a\u00e7o ferramenta D2<\/h1>\n\n\n\n

D2 tool steel is a high-carbon, high-chromium, air-hardening cold-work tool steel. Its typical composition contains 1.40\u20131.60% carbon and 11.00\u201313.00% chromium, with molybdenum and vanadium added to improve hardenability, wear resistance, tempering stability, and dimensional control during heat treatment.<\/p>\n\n\n\n

D2 Chemical Composition and Equivalent Grades<\/h2>\n\n\n\n
Padr\u00e3o<\/strong><\/td>Grau<\/strong><\/td>C (%)<\/strong><\/td>Cr (%)<\/strong><\/td>Mo (%)<\/strong><\/td>V (%)<\/strong><\/td>Si (%)<\/strong><\/td>Mn (%)<\/strong><\/td><\/tr>
AISI \/ SAE<\/td>D2<\/td>1.40\u20131.60<\/td>11.00\u201313.00<\/td>0.70\u20131.20<\/td>0.50\u20131.10<\/td>\u22640.60<\/td>\u22640.60<\/td><\/tr>
ONU<\/td>T30402<\/td>1.40\u20131.60<\/td>11.00\u201313.00<\/td>0.70\u20131.20<\/td>0.50\u20131.10<\/td>\u22640.60<\/td>\u22640.60<\/td><\/tr>
DIN \/ EN<\/td>1.2379<\/td>1.45\u20131.60<\/td>11.00\u201312.50<\/td>0.70\u20131.00<\/td>0.70\u20131.00<\/td>\u22640.60<\/td>\u22640.60<\/td><\/tr>
JIS<\/td>SKD11<\/td>1.40\u20131.60<\/td>11.00\u201313.00<\/td>0.80\u20131.20<\/td>0,20\u20130,50<\/td>\u22640.60<\/td>\u22640.40<\/td><\/tr>
GB<\/td>Cr12Mo1V1<\/td>1.40\u20131.60<\/td>11.00\u201312.00<\/td>0.70\u20131.00<\/td>0.70\u20131.00<\/td>\u22640.40<\/td>\u22640.40<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

D2, 1.2379, SKD11, and Cr12Mo1V1 are commonly treated as equivalent or closely comparable cold-work tool steels. However, buyers should confirm the required standard, chemical analysis, delivery condition, and heat-treatment route before final use.<\/p>\n\n\n\n

Role of Key Alloying Elements in D2 Steel<\/h2>\n\n\n\n

D2 performance is mainly controlled by carbon, chromium, molybdenum, and vanadium. These elements determine carbide volume, hardenability, wear resistance, toughness, and dimensional behavior during heat treatment.<\/p>\n\n\n\n

Elemento<\/strong><\/td>Fun\u00e7\u00e3o principal<\/strong><\/td>Practical Effect<\/strong><\/td><\/tr>
Carbono<\/td>Increases hardness and carbide volume<\/td>Improves wear resistance, but reduces toughness<\/td><\/tr>
Cromo<\/td>Forms chromium-rich carbides and improves hardenability<\/td>Provides strong abrasion resistance, but does not make D2 a true stainless steel<\/td><\/tr>
Molibd\u00eanio<\/td>Improves hardenability and tempering resistance<\/td>Supports air hardening and reduces quenching distortion<\/td><\/tr>
Van\u00e1dio<\/td>Refines grain structure and forms stable hard carbides<\/td>Improves wear resistance and helps control grain growth<\/td><\/tr>
Silicon and Manganese<\/td>Support deoxidation and hardenability control<\/td>Secondary supporting elements<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Carbon is the foundation of D2\u2019s hardness. At 1.40\u20131.60%, it allows D2 to achieve high hardness after quenching and provides sufficient carbon to form a large volume fraction of alloy carbides. This improves wear resistance, but reduces the steel\u2019s ability to absorb impact.<\/p>\n\n\n\n

Chromium is the second major element in D2. At 11.00\u201313.00%, it forms chromium-rich carbides, which are the main source of D2\u2019s abrasion resistance. However, much of the chromium is tied up in carbides rather than remaining free in the matrix. For this reason, D2 has better staining resistance than plain carbon steel, but it should not be treated as a true stainless steel.<\/p>\n\n\n\n

Molybdenum helps make D2 an air-hardening steel. It slows the formation of pearlite during cooling, allowing D2 to harden without a severe water or oil quench. This helps reduce distortion and the risk of cracking during controlled heat treatment.<\/p>\n\n\n\n

Vanadium improves grain control and forms hard, stable carbides. These carbides support wear resistance and help maintain hardness stability after heat treatment.<\/p>\n\n\n\n

How D2 Composition Affects Material Properties<\/h2>\n\n\n\n

D2 develops a hard martensitic matrix with a high volume of alloy carbides after proper heat treatment. This structure explains both its high wear resistance and its limited toughness.<\/p>\n\n\n\n

Propriedade<\/strong><\/td>Effect of D2 Composition<\/strong><\/td>Significado pr\u00e1tico<\/strong><\/td><\/tr>
Dureza<\/td>High carbon supports high martensitic hardness<\/td>Common working hardness is usually about 58\u201362 HRC after heat treatment<\/td><\/tr>
Resist\u00eancia ao desgaste<\/td>Chromium-rich carbides resist abrasion<\/td>Suitable for long-run cold-work dies, punches, knives, and shear blades<\/td><\/tr>
Robustez<\/td>High carbide volume reduces impact resistance<\/td>Not ideal for heavy shock, bending stress, or impact-loaded tooling<\/td><\/tr>
Usinabilidade<\/td>Hard carbides increase cutting and grinding difficulty<\/td>Processing cost is higher than lower-alloy steels<\/td><\/tr>
Estabilidade dimensional<\/td>Air hardening reduces severe quench distortion<\/td>Suitable for precision tools when heat treatment is properly controlled<\/td><\/tr>
Resist\u00eancia \u00e0 corros\u00e3o<\/td>Chromium is partly locked in carbides<\/td>Better staining resistance than plain carbon steel, but not stainless<\/td><\/tr>
Soldabilidade<\/td>High carbon and carbide content increase cracking risk<\/td>Welding is generally difficult and not recommended for normal tooling use<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

D2 is suitable when abrasive wear is the main failure mode. Its carbide-rich structure helps cutting edges and working surfaces resist wear during repeated contact with work materials. This is why D2 is widely used for blanking dies, forming dies, punches, slitting cutters, shear blades, and trimming tools.<\/p>\n\n\n\n

The same carbide structure reduces toughness. Large carbides can become crack initiation points under impact or cyclic stress. If the tool must withstand repeated shock, severe bending, or impact loading, a tougher grade such as A2<\/a> ou S7<\/a> may be more suitable.<\/p>\n\n\n\n

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Not Sure Between D2, A2, or S7? Get Expert Advice from Aobo Steel<\/a><\/div>\n<\/div>\n\n\n\n

Heat Treatment Behavior Controlled by Composition<\/h2>\n\n\n\n

D2\u2019s high carbon and chromium content create a carbide-rich structure, while molybdenum and vanadium improve hardenability and tempering stability. This is why D2 can be air-hardened and usually exhibits better dimensional stability than tool steels that require more severe quenching.<\/p>\n\n\n\n

During heat treatment, austenitizing temperature and tempering control are important because excessive carbide dissolution can increase retained austenite and reduce dimensional stability. For most buyers, the key point is simple: D2 composition supports high hardness, strong wear resistance, and controlled size change, but only when heat treatment is properly managed.<\/p>\n\n\n\n

Composition Factor<\/strong><\/td>Heat Treatment Effect<\/strong><\/td><\/tr>
Alto teor de carbono<\/td>Supports high hardness after quenching<\/td><\/tr>
High chromium<\/td>Forms wear-resistant carbides<\/td><\/tr>
Molibd\u00eanio<\/td>Improves air-hardening response<\/td><\/tr>
Van\u00e1dio<\/td>Supports grain control and hardness stability<\/td><\/tr>
High alloy con<\/strong>tent<\/strong><\/td>Requires controlled heating and tempering<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

For detailed information, see \ud83d\udc49\u00a0how to heat-treat<\/a> A\u00e7o para ferramentas D2<\/a>.<\/p>\n\n\n\n

Engineering Considerations for D2 Tool Steel<\/h2>\n\n\n\n

D2\u2019s composition defines how the material should be used and processed. Its air-hardening behavior helps reduce distortion during quenching, making it suitable for precision cold-work tooling. However, controlled preheating is important because D2 has relatively low thermal conductivity and high alloy content.<\/p>\n\n\n\n

D2 is suitable for high-wear, low-impact applications such as blanking dies, shear blades, punches, forming tools, and trimming tools. It is not suitable for tooling exposed to repeated shock loading, where toughness is more important than wear resistance.<\/p>\n\n\n\n

Surface treatments such as nitriding or PVD coatings can extend tool life when D2 is used under the right working conditions. These treatments work best when the base material has appropriate hardness, a stable heat treatment, and sufficient toughness for the application.<\/p>\n\n\n\n

Application Condition<\/strong><\/td>Suitability of D2<\/strong><\/td>Raz\u00e3o<\/strong><\/td><\/tr>
desgaste abrasivo<\/td>Excelente<\/td>High carbide volume resists wear<\/td><\/tr>
Long-run blanking and forming<\/td>Bom<\/td>High hardness and dimensional stability support tool life<\/td><\/tr>
Precision cold-work tools<\/td>Bom<\/td>Air hardening helps reduce distortion<\/td><\/tr>
Heavy impact<\/td>Pobre<\/td>Carbide-rich structure limits toughness<\/td><\/tr>
Severe bending stress<\/td>Pobre<\/td>Crack risk increases under bending load<\/td><\/tr>
Stainless steel stamping<\/td>Conditional<\/td>Galling risk may require coating or surface treatment<\/td><\/tr>
Welding repair<\/td>N\u00e3o recomendado<\/td>High carbon and carbide content increase cracking risk<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"Barras<\/figure>\n\n\n\n

Aobo Steel supplies D2 \/ 1.2379 \/ SKD11 tool steel in an annealed condition for bulk industrial orders. We provide round bar and plate for distributors, stockists, and tooling manufacturers. You can view our P\u00e1gina do produto em a\u00e7o ferramenta D2<\/a> or contact us directly via sales@aobosteel.com<\/a><\/p>\n\n\n\n

Perguntas frequentes<\/h2>\n\n\n\n
Qual \u00e9 a composi\u00e7\u00e3o qu\u00edmica do a\u00e7o ferramenta D2?<\/strong>

D2 tool steel typically contains 1.40\u20131.60% carbon<\/strong>, 11.00\u201313.00% chromium<\/strong>, 0.70\u20131.20% molybdenum<\/strong>, e 0.50\u20131.10% vanadium<\/strong>. It also contains controlled levels of manganese, silicon, nickel, phosphorus, and sulfur. This high-carbon, high-chromium composition gives D2 strong wear resistance and high hardness after heat treatment.<\/p> <\/div>

Why does D2 steel have high wear resistance?<\/strong>

D2 has high wear resistance because its high carbon and chromium content form a large volume of hard chromium-rich carbides. These carbides resist abrasive wear and help D2 maintain edge stability in cold-work tools such as blanking dies, punches, shear blades, and forming tools.<\/p> <\/div>

How does carbon affect D2 tool steel?<\/strong>

Carbon increases the hardenability and carbide volume fraction of D2 tool steel. This improves wear resistance and compressive strength but reduces toughness. The high carbon content is one reason D2 performs well in wear-dominated tooling but is less suitable for heavy-impact applications.<\/p> <\/div>

How does chromium affect D2 tool steel?<\/strong>

Chromium forms hard chromium-rich carbides and improves hardenability. These carbides are the main reason for D2\u2019s strong abrasion resistance. However, because much of the chromium is locked in carbides, D2 does not have the corrosion resistance of true stainless steels.<\/p> <\/div>

What is the role of molybdenum in D2 steel?<\/strong>

Molybdenum improves hardenability and helps D2 harden in air. This reduces the need for severe quenching and helps control distortion during heat treatment. It also supports tempering resistance and dimensional stability.<\/p> <\/div>

What is the role of vanadium in D2 steel?<\/strong>

Vanadium helps refine grain structure and forms hard, stable carbides. In D2 tool steel, vanadium supports wear resistance, grain control, and hardness stability after heat treatment.<\/p> <\/div>

Why is D2 difficult to machine?<\/strong>

D2 is difficult to machine because it contains a high volume of hard alloy carbides. These carbides increase cutting tool wear and make grinding more demanding, even when the material is supplied in an annealed condition.<\/p> <\/div> <\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"

Chemical Composition of D2 Tool Steel D2 tool steel is a high-carbon, high-chromium, air-hardening cold-work tool steel. Its typical composition contains 1.40\u20131.60% carbon and 11.00\u201313.00% chromium, with molybdenum and vanadium added to improve hardenability, wear resistance, tempering stability, and dimensional control during heat treatment. D2 Chemical Composition and Equivalent Grades Standard Grade C (%) Cr […]<\/p>\n","protected":false},"author":1,"featured_media":14999,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_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":"disabled","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":"set","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-13462","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nD2 Steel Chemical Composition: Aobo Steel Gives the Definitive Answer<\/title>\n<meta name=\"description\" content=\"Aobo Steel explains D2 steel chemical composition in a clear and direct way. 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It also supports tempering resistance and dimensional stability.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/d2-steel-composition\/#faq-question-1777939964378","position":6,"url":"https:\/\/aobosteel.com\/d2-steel-composition\/#faq-question-1777939964378","name":"What is the role of vanadium in D2 steel?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Vanadium helps refine grain structure and forms hard, stable carbides. In D2 tool steel, vanadium supports wear resistance, grain control, and hardness stability after heat treatment.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/d2-steel-composition\/#faq-question-1777939965804","position":7,"url":"https:\/\/aobosteel.com\/d2-steel-composition\/#faq-question-1777939965804","name":"Why is D2 difficult to machine?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"D2 is difficult to machine because it contains a high volume of hard alloy carbides. These carbides increase cutting tool wear and make grinding more demanding, even when the material is supplied in an annealed condition.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"uagb_featured_image_src":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-300x300.avif",300,300,true],"medium_large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-768x768.avif",768,768,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-12x12.avif",12,12,true]},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Chemical Composition of D2 Tool Steel D2 tool steel is a high-carbon, high-chromium, air-hardening cold-work tool steel. Its typical composition contains 1.40\u20131.60% carbon and 11.00\u201313.00% chromium, with molybdenum and vanadium added to improve hardenability, wear resistance, tempering stability, and dimensional control during heat treatment. D2 Chemical Composition and Equivalent Grades Standard Grade C (%) Cr…","rttpg_featured_image_url":{"full":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"landscape":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"portraits":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"thumbnail":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-150x150.avif",150,150,true],"medium":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-300x300.avif",300,300,true],"large":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-1024x1024.avif",1024,1024,true],"1536x1536":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"2048x2048":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition.avif",1254,1254,false],"trp-custom-language-flag":["https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/05\/d2-composition-12x12.avif",12,12,true]},"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"Chemical Composition of D2 Tool Steel D2 tool steel is a high-carbon, high-chromium, air-hardening cold-work tool steel. Its typical composition contains 1.40\u20131.60% carbon and 11.00\u201313.00% chromium, with molybdenum and vanadium added to improve hardenability, wear resistance, tempering stability, and dimensional control during heat treatment. D2 Chemical Composition and Equivalent Grades Standard Grade C (%) Cr…","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/13462","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/comments?post=13462"}],"version-history":[{"count":0,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/13462\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media\/14999"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=13462"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}