{"id":1949,"date":"2024-11-28T13:34:01","date_gmt":"2024-11-28T13:34:01","guid":{"rendered":"https:\/\/mmturbo.com\/?page_id=1949"},"modified":"2024-12-02T13:26:44","modified_gmt":"2024-12-02T13:26:44","slug":"tool-die-steel","status":"publish","type":"page","link":"https:\/\/786fumigations.com\/mmtturbo\/tool-die-steel\/","title":{"rendered":"Tool ( Die) Steel"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"1949\" class=\"elementor elementor-1949\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-93a7c28 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"93a7c28\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e22dfc3\" data-id=\"e22dfc3\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-82d49d0 elementor-widget elementor-widget-heading\" data-id=\"82d49d0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Tool ( Die) Steel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e214faa elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"e214faa\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-163a870d\" data-id=\"163a870d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-168ff88c elementor-widget elementor-widget-heading\" data-id=\"168ff88c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Tool Die Steel<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4690e788 elementor-widget elementor-widget-text-editor\" data-id=\"4690e788\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThis category of steel is normally referred as fine high class steel which is quite appropriate to be made into tools. The grades that are part of tool steel group are differentiated from other categories of steel on the basis of their distinctive hardness, high resistance to abrasion, resistance to deformation at elevated temperatures and their ability to hold a cutting edge.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d1b2bf5 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"3d1b2bf5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-f834e84\" data-id=\"f834e84\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-1944867c elementor-widget elementor-widget-text-editor\" data-id=\"1944867c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tThis category of steel is normally referred as fine high class steel which is quite appropriate to be made into tools. The grades that are part of tool steel group are differentiated from other categories of steel on the basis of their distinctive hardness, high resistance to abrasion, resistance to deformation at elevated temperatures and their ability to hold a cutting edge. Tool steel is generally used in a heat treated state for the purpose of getting good performance and increasing the life of material. There are many grades in tool steel that are used in different applications.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-31945037\" data-id=\"31945037\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2cd3301 elementor-widget elementor-widget-image\" data-id=\"2cd3301\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"525\" height=\"421\" src=\"https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-1024x822.jpeg\" class=\"attachment-large size-large wp-image-1954\" alt=\"\" srcset=\"https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-1024x822.jpeg 1024w, https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-300x241.jpeg 300w, https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-768x617.jpeg 768w, https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-1536x1233.jpeg 1536w, https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2-600x482.jpeg 600w, https:\/\/786fumigations.com\/mmtturbo\/wp-content\/uploads\/2024\/11\/WhatsApp-Image-2024-11-18-at-11.12.10-PM-2.jpeg 1538w\" sizes=\"(max-width: 525px) 100vw, 525px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-27d04405 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"27d04405\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3b3642e1\" data-id=\"3b3642e1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-493ad94f elementor-widget elementor-widget-html\" data-id=\"493ad94f\" data-element_type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\n<div class=\"table-container\">\n  <table>\n    <tr>\n      <th>Temperature [\u00b0C]<\/th>\n      <td>400<\/td>\n      <td>500<\/td>\n      <td>550<\/td>\n      <td>600<\/td>\n      <td>650<\/td>\n    <\/tr>\n    <tr>\n      <th>Hardness [HRC]<\/th>\n      <td>56<\/td>\n      <td>58<\/td>\n      <td>54<\/td>\n      <td>50<\/td>\n      <td>48<\/td>\n    <\/tr>\n  <\/table>\n<\/div>\n<style>\n  .table-container {\n    overflow-x: auto;\n    display: inline-block;\n    border-collapse: collapse;\n    border: 1px solid #ccc;\n    font-family: Arial, sans-serif;\n    width: 100%;\n    max-width: 1200px;\n  }\n  .table-container table {\n    width: 100%;\n    border-collapse: collapse;\n  }\n  .table-container th, .table-container td {\n    padding: 10px;\n    text-align: center;\n    border: 1px solid #ddd;\n  }\n  .table-container th {\n    background-color: #202457;\n    color: #fff;\n    font-weight: bold;\n  }\n<\/style>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-21e44218 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"21e44218\" data-element_type=\"section\" id=\"xs_faq_5\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-535c2aa6\" data-id=\"535c2aa6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-329c0207 elementor-section-boxed elementor-section-height-default elementor-section-height-default wpr-particle-no wpr-jarallax-no wpr-parallax-no wpr-sticky-section-no\" data-id=\"329c0207\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-inner-column elementor-element elementor-element-3ea919f1\" data-id=\"3ea919f1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-73b192f0 elementor-widget elementor-widget-elementskit-accordion\" data-id=\"73b192f0\" data-element_type=\"widget\" data-widget_type=\"elementskit-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"ekit-wid-con\" >\n        <div class=\"elementskit-accordion accoedion-primary\" id=\"accordion-69d43d9857c06\">\n\n            \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-0-73b192f0\">\n                        <a href=\"#collapse-b8294b969d43d9857c06\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-b8294b969d43d9857c06\" aria-expanded=\"false\" aria-controls=\"Collapse-b8294b969d43d9857c06\">\n                            \n                            <span class=\"ekit-accordion-title\">H 13 (Hot Work) Tool (Die) Steel<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-b8294b969d43d9857c06\" class=\" collapse\" aria-labelledby=\"primaryHeading-0-73b192f0\" data-parent=\"#accordion-69d43d9857c06\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>[elementor-template id=\"1964\"]<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-1-73b192f0\">\n                        <a href=\"#collapse-30f4fff69d43d9857c06\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-30f4fff69d43d9857c06\" aria-expanded=\"false\" aria-controls=\"Collapse-30f4fff69d43d9857c06\">\n                            \n                            <span class=\"ekit-accordion-title\">H 13 Supra  (Hot Work) Tool (Die) Steel<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-30f4fff69d43d9857c06\" class=\" collapse\" aria-labelledby=\"primaryHeading-1-73b192f0\" data-parent=\"#accordion-69d43d9857c06\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            [elementor-template id=\"2367\"]                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-2-73b192f0\">\n                        <a href=\"#collapse-1b30ae469d43d9857c06\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-1b30ae469d43d9857c06\" aria-expanded=\"false\" aria-controls=\"Collapse-1b30ae469d43d9857c06\">\n                            \n                            <span class=\"ekit-accordion-title\">D2(Cold Work) Tool (Die) Steel<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-1b30ae469d43d9857c06\" class=\" collapse\" aria-labelledby=\"primaryHeading-2-73b192f0\" data-parent=\"#accordion-69d43d9857c06\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>[elementor-template id=\"1986\"]<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                \n                <div class=\"elementskit-card \">\n                    <div class=\"elementskit-card-header\" id=\"primaryHeading-3-73b192f0\">\n                        <a href=\"#collapse-7bd342e69d43d9857c06\" class=\"ekit-accordion--toggler elementskit-btn-link collapsed\" data-ekit-toggle=\"collapse\" data-target=\"#Collapse-7bd342e69d43d9857c06\" aria-expanded=\"false\" aria-controls=\"Collapse-7bd342e69d43d9857c06\">\n                            \n                            <span class=\"ekit-accordion-title\">D3(Cold Work) Tool (Die) Steel<\/span>\n\n                            \n                                <div class=\"ekit_accordion_icon_group\">\n                                    <div class=\"ekit_accordion_normal_icon\">\n                                        <!-- Normal Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-down-arrow1\"><\/i>                                    <\/div>\n\n                                    <div class=\"ekit_accordion_active_icon\">\n                                        <!-- Active Icon -->\n\t\t\t\t\t\t\t\t\t\t<i class=\"icon icon-up-arrow\"><\/i>                                    <\/div>\n                                <\/div>\n\n                            \n                                                    <\/a>\n                    <\/div>\n\n                    <div id=\"Collapse-7bd342e69d43d9857c06\" class=\" collapse\" aria-labelledby=\"primaryHeading-3-73b192f0\" data-parent=\"#accordion-69d43d9857c06\">\n\n                        <div class=\"elementskit-card-body ekit-accordion--content\">\n                            <p>[elementor-template id=\"2003\"]<\/p>                        <\/div>\n\n                    <\/div>\n\n                <\/div><!-- .elementskit-card END -->\n\n                                        <\/div>\n    <\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Tool ( Die) Steel Tool Die Steel This category of steel is normally referred as fine high class steel which is quite appropriate to be made into tools. The grades that are part of tool steel group are differentiated from other categories of steel on the basis of their distinctive hardness, high resistance to abrasion, resistance to deformation at elevated temperatures and their ability to hold a cutting edge.This category of steel is normally referred as fine high class steel which is quite appropriate to be made into tools. The grades that are part of tool steel group are differentiated from other categories of steel on the basis of their distinctive hardness, high resistance to abrasion, resistance to deformation at elevated temperatures and their ability to hold a cutting edge. Tool steel is generally used in a heat treated state for the purpose of getting good performance and increasing the life of material. There are many grades in tool steel that are used in different applications. Temperature [\u00b0C] 400 500 550 600 650 Hardness [HRC] 56 58 54 50 48 H 13 (Hot Work) Tool (Die) Steel H13 too steel comes in hot work category of Die\/ Tool Steel. It is a versatile chromium molybdenum that is extensively used in hot work applications especially in die &amp; molds.The Hot strength of H13 resists thermal fatigue cracking which occurs as a result of frequent heating &amp; cooling cycles of in hot work tooling applications.Major applications includes hot forging dies, pressure die casting molds, hot extrusion dies for aluminum, brass and copper, die holders &amp; backers. We are keeping this grade in rounds, plates &#038; blocks on regular basis in both EAF &#038; ESR melting processes. H13\/1.2344 Chemical Composition Chemical Contents Carbon test Manganese Molybdenum Vanadium Silicon Percentage 0.38-0.42 4.5-5.5 0.40-0.50 1.20-1.40 0.9-1.1 0.9-1.1 Hardening and Tempering Preheating H13 tool steels to 816\u00b0C (1500\u00b0F). The temperature is then instantly raised to 990-1040\u00b0C and held there for sometime depending on the size of component. After that, the steels are either oil quenched &#038; air-quenched. Hardening \u00b0C Quenching Hardness after quenching HRC 1030 &#8211; 1060 Air, oil or salt bath, 500 &#8211; 550 \u00b0C 55 Tempering \u00b0C 100 210 300 400 500 550 600 650 700 HRC 54 53 53 55 56 54 51 43 34 H 13 Supra (Hot Work) Tool (Die) Steel H13 ( Supra) has been introduced by MMT as superior version of H13 making it more tough in terms of die strokes, mold strength being overall better in performance and life of parts. More chemical content of Mo makes it much more reliable when it comes to brass &#038; copper extrusion and forging. Hardening and Tempering Preheat to 790-810\u00b0C. Soak thoroughly, and then increase rapidly to the final hardening temperature of 990-1040\u00b0C. When H13( Supra) component has attained this temperature, soak for approximately thirty minutes. Cool in air. Large sections may be quenched in oil. Tools should be tempered as soon as they become hand warm. Heat uniformly to the required temperature allowing a soaking time of two hours per 25mm of ruling section. Withdraw from the furnace and allow to cool in air. A second tempering is strongly recommended, the tool being allowed to cool to room temperature between tempers. The usual tempering range is 530-650\u00b0C depending on the hardness requirements and the operating temperature of the tool. Responsive Table Temperature [\u00b0C] 400 500 550 600 650 Hardness [HRC] 56 58 54 50 48 D2(Cold Work) Tool (Die) Steel MMT is supplier of D2 tool steel in round bars, plates and blocks which can be sawn(cut) to your requirements. It is a high carbon high chromium tool steel grade offering very high wear resistance and toughness. D2 tool steel hardens in air with a low order of movement and offers a measure of corrosion resistance when polished. Commonly used for tools operating under conditions of severe wear and abrasion or as an alternative to oil hardening grades when long runs are required Chemical Contents Carbon Chromium Manganese Molybdenum Vanadium ****** Percentage 1.45-1.60 11.0-13.0 0.4-0.5 0.75-0.90 0.70-0.9 Applications A popular grade for toolmakers, D2 is used in a wide variety of tool making applications. Typical applications include blanking dies and punches for sheet in stainless steel, brass, copper, zinc and hard abrasive materials generally. Other applications include deep drawing dies, forming dies, sheet metal forming rolls, shear blades for strip and sheet including circular cutters for cold rolled strip, trimmer dies, thread rolling dies, cold extrusion dies, broaches, plug gauges, ring gauges, special taps, brick and tile mould liners and cut moulds for plastics. Hardening and Tempering It is preferable to heat the tools in a controlled atmosphere. If this is not possible, pack hardening is recommended. A reducing atmosphere is desirable. Pre heat the D2 tool steel component to 750-800\u00b0C. And allow to soak (putting in a liquid for some period of time) at this temperature. The tools may then be brought up to 1000-1040\u00b0C for air cooling, or 980\u00b0C for oil quenching. Soak thoroughly at the temperature for thirty minutes per 25mm of ruling section, then cool or quench accordingly. It is important not to exceed 1020\u00b0C when heating for hardening. Double tempering is recommended. Tempering of D2 tool steel should be done with the least possible delay after hardening, preferably when the tools are still hand warm. Select a suitable tempering temperature, bearing in mind the service requirements. Heat slowly and uniformly. When the D2 component has reached the desired temperature, soak for at least one hour per 25mm of section. The second tempering should be a repetition of the first. Temperature [\u00b0C] 150 200 250 300 350 400 Hardness [HRC] 62-61 61-60 60-59 57-56 56-55 56-55 D3(Cold Work) Tool (Die) Steel High carbon high chromium steel noted for its resistance to abrasion, it offers excellent dimensional stability in hardening. After heat treatment, D3 is hard, durable and dense, and is immune from sinking in use. It offers a measure of corrosion resistance when polished. 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