{"id":9334,"date":"2025-08-02T10:11:30","date_gmt":"2025-08-02T02:11:30","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9334"},"modified":"2026-04-26T00:12:20","modified_gmt":"2026-04-25T16:12:20","slug":"m42-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/m42-tool-steel\/","title":{"rendered":"M42 tool steel | 1.3247 | SKH59"},"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; M42 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\">AISI M42 Tool Steel | 1.3247 | SKH59 Super Hard Cobalt High Speed Steel<\/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 M42 Material<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">M42 tool steel is classified as a molybdenum-based high-speed tool steel within the M series. It\u2019s a complex iron-based alloy known for its high-carbon content and the addition of various alloying elements. These alloying elements are critical because they form carbides that contribute significantly to the steel\u2019s properties, such as wear resistance and resistance to softening at elevated temperatures.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-chemical-composition\">1. Chemical 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>W<\/td><td>Co<\/td><td>V<\/td><td>Mn<\/td><td>Si<\/td><td>P<\/td><td>S<\/td><td>Cu<\/td><td>Ni<\/td><\/tr><tr><td>1.05 \u2013 1.1<\/td><td>3.5 \u2013 4.25<\/td><td>9.0 \u2013 10.0<\/td><td>1.15 \u2013 1.85<\/td><td>7.75 \u2013 8.75<\/td><td>0.95 \u2013 1.35<\/td><td>0.15 \u2013 0.40<\/td><td>0.15 \u2013 0.65<\/td><td>0.03 max<\/td><td>0.03 max<\/td><td>0.25 max<\/td><td>0.3 max<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-properties\">2. Properties<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A clear understanding of&nbsp;<strong>M42 tool steel properties<\/strong>&nbsp;is crucial for operations that require high-performance cutting tools. M42 is a molybdenum-type high-speed tool steel (HSS), typically containing tungsten and cobalt. It\u2019s engineered for applications where heat and wear are primary concerns.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here are its key characteristics based on the provided information:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-1-core-performance-attributes\">2.1 Core Performance Attributes<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Exceptional Hardness:<\/strong>&nbsp;M42 achieves very high hardness levels (up to 68-70 HRC) after heat treatment. Its as-quenched hardness is typically around 65 HRC, placing it among the hardest HSS grades.<\/li>\n\n\n\n<li><strong>Excellent Hot Hardness:<\/strong>&nbsp;This steel maintains high hardness at elevated temperatures (up to 538\u00b0C\/1000\u00b0F), which is crucial for high-speed cutting operations. Its hot hardness surpasses that of conventional HSS, such as&nbsp;<em><a href=\"https:\/\/aobosteel.com\/ko\/m2-tool-steel\/\">M2<\/a><\/em>&nbsp;or M7.<\/li>\n\n\n\n<li><strong>Superior Wear Resistance:<\/strong>&nbsp;M42 offers excellent wear resistance. This is due to its hard martensitic matrix and the presence of hard alloy carbides formed by elements such as vanadium, molybdenum, tungsten, and chromium.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-2-heat-treatment-and-structural-integrity\">2.2 Heat Treatment and Structural Integrity<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Secondary Hardening:<\/strong>\u00a0M42 exhibits secondary hardening during\u00a0tempering. Tempering at specific elevated temperatures (e.g., 950\u00b0F\/510\u00b0C or 1000\u00b0F\/538\u00b0C) can result in a tempered hardness equal to or higher than its as-quenched hardness. Multiple tempering steps are generally recommended to improve overall toughness by transforming retained\u00a0<em>austenite<\/em>.<\/li>\n\n\n\n<li><strong>Toughness:<\/strong>&nbsp;While M42 offers good toughness, it is relatively low compared to some other tool steel types. This can sometimes lead to chipping in general applications where a grade like M2 might perform better.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-2-3-machinability-and-processing\">2.3 Machinability and Processing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M42 tool steel has a machinability rating of approximately 65 (where W1 carbon tool steel = 100). It is also considered relatively easy to grind.<\/p>\n\n\n\n<div class=\"wp-block-columns has-ast-global-color-8-background-color has-background 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=\"1000\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel.avif\" alt=\"M42 TOOL STEEL\" class=\"wp-image-4845\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel.avif 1000w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel-300x300.avif 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel-150x150.avif 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel-768x768.avif 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/03\/M42-high-speed-steel-12x12.avif 12w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><figcaption class=\"wp-element-caption\">M42 high-speed steel<\/figcaption><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Are you looking for M42 high-speed steel? Please fill out the following form to contact us now!<\/p>\n\n\n\n<div class=\"wp-block-leadin-hubspot-form-block\">\n\t\t\t\t\t\t<script>\n\t\t\t\t\t\t\twindow.hsFormsOnReady = window.hsFormsOnReady || [];\n\t\t\t\t\t\t\twindow.hsFormsOnReady.push(()=>{\n\t\t\t\t\t\t\t\thbspt.forms.create({\n\t\t\t\t\t\t\t\t\tportalId: 242461771,\n\t\t\t\t\t\t\t\t\tformId: \"1f7a4dcb-eb56-45e5-bd4f-5921cbf714c1\",\n\t\t\t\t\t\t\t\t\ttarget: \"#hbspt-form-1781065727000-3862392104\",\n\t\t\t\t\t\t\t\t\tregion: \"na2\",\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t})});\n\t\t\t\t\t\t<\/script>\n\t\t\t\t\t\t<div class=\"hbspt-form\" id=\"hbspt-form-1781065727000-3862392104\"><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-m42-tool-steel-heat-treatment\">3. M42 Tool Steel\u00a0<em>Heat Treatment<\/em><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An ideally treated M42 tool undergoes several distinct phases: preparation and preheating, austenitizing (hardening), quenching, and tempering. Each stage is indispensable for developing the desired microstructure and mechanical properties.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-1-preparation-and-preheat\">3.1 Preparation and Preheat<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Meticulous preparation is crucial before subjecting M42 tool steel to high-temperature hardening. This often includes initial processes, such as\u00a0annealing, which softens the steel, refines its microstructure, and prepares it for effective hardening. Tools may also be\u00a0spheroidized\u00a0to enhance machinability.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M42 tool steel heat treatment typically incorporates a staged preheating phase, vital for minimizing thermal shock and potential cracking, especially in tools with varying cross-sections.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A common preheat temperature for M42 is&nbsp;<strong>815\u00b0C (1500\u00b0F)<\/strong>.<\/li>\n\n\n\n<li>The goal is to uniformly bring the steel to temperature, reducing stress before the critical austenitizing stage.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-2-austenitizing-hardening\">3.2 Austenitizing (Hardening)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Austenitizing is the fundamental transformation stage. Here, annealed M42 tool steel (mainly ferrite and alloy carbides) is heated to a specific high temperature. This converts the structure to&nbsp;<strong>austenite<\/strong>&nbsp;and dissolves complex alloy carbides, essential for final hardness and wear characteristics.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key parameters for austenitizing M42 tool steel include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"><strong>Temperature:<\/strong>&nbsp;Typically between&nbsp;<strong>1180\u00b0C and 1190\u00b0C (2155\u00b0F and 2175\u00b0F)<\/strong>.<\/span> One study identified 1180\u00b0C (1453 K) as an optimal austenitizing temperature.<\/li>\n\n\n\n<li><strong>Holding Time:<\/strong>&nbsp;Relatively short for high-speed steels, generally&nbsp;<strong>2 to 6 minutes<\/strong>&nbsp;once the steel reaches the target temperature. For instance, a 4-minute soak at 1190\u00b0C (2175\u00b0F) is a common recommendation. Holding M42 at 1180\u00b0C for 15 to 30 minutes has shown consistent microstructure and hardness.<\/li>\n\n\n\n<li><strong>Caution:<\/strong>&nbsp;Exceeding the recommended temperature or holding time can be detrimental. It can lead to excessive carbide dissolution and undesirable grain growth, negatively impacting the steel\u2019s properties, including a potential decrease in hardness due to phenomena like Ostwald ripening if held for too long (e.g., 45 minutes at 1180\u00b0C).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-3-quenching\">3.3 Quenching<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After austenitizing, M42 tool steel is rapidly cooled (quenched) to transform austenite into\u00a0martensite. Martensite is the hard crystal structure providing cutting and wear-resistant properties.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Quenching Media:<\/strong>&nbsp;This can be achieved using air, oil, or a salt bath. M42 tool steel has deep hardenability, achieving good hardness throughout its cross-section.<\/li>\n\n\n\n<li><strong>Cooling Rate:<\/strong>&nbsp;A high cooling rate is important. It influences the martensite start (Ms) and finish (Mf) temperatures and can affect the amount of retained austenite.<\/li>\n\n\n\n<li>As-Quenched Hardness: M42 tool steel typically achieves an as-quenched hardness of around 65-68 HRC.<br>Untempered martensite, while very hard, is also highly stressed, brittle, and unstable. Tempering is therefore essential.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-4-tempering\">3.4 Tempering<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tempering, a critical step after quenching, involves reheating M42 tool steel to an intermediate temperature below its critical transformation point. This significantly enhances usability and performance through several mechanisms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stress Relief:<\/strong>&nbsp;Relieves internal stresses from quenching, reducing susceptibility to cracking.<\/li>\n\n\n\n<li><strong>Toughness Improvement:<\/strong>&nbsp;Significantly increases toughness, making the steel less brittle.<\/li>\n\n\n\n<li><strong>Retained Austenite Transformation:<\/strong>&nbsp;Transforms retained austenite (which can reduce hardness and dimensional stability) into fresh martensite, tempered in subsequent cycles.<\/li>\n\n\n\n<li><strong>Secondary Hardening:<\/strong>&nbsp;M42 exhibits&nbsp;<strong>secondary hardening<\/strong>. Fine, complex alloy carbides precipitate during tempering, further increasing hardness. M42 is known for excellent hot hardness, reaching up to&nbsp;<strong>69 HRC<\/strong>&nbsp;after tempering (typically around&nbsp;<strong>538\u00b0C \/ 1000\u00b0F<\/strong>). Optimal results often involve tempering on the high side of the secondary hardness peak.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Multiple Tempering Cycles:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M42 tool steel requires multiple tempering cycles (usually two to four) to ensure full transformation of retained austenite and to temper new martensite.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Temperature:<\/strong>&nbsp;Common tempering temperatures for M42 are between&nbsp;<strong>510\u00b0C (950\u00b0F) and 538\u00b0C (1000\u00b0F)<\/strong>.<\/li>\n\n\n\n<li><strong>Soaking Time:<\/strong>&nbsp;Each tempering cycle typically involves soaking for&nbsp;<strong>2 to 4 hours<\/strong>&nbsp;at the chosen temperature.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Stress-Relief Temper (Post-Machining):<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After significant grinding, welding, or Electrical Discharge Machining (EDM) on heat-treated M42, a final stress-relief temper is strongly recommended at a temperature 14-28\u00b0C (25-50\u00b0F) lower than the last tempering temperature.<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">M42 Tool Steel Tempering Temperatures and Resulting Hardness<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Tempering Temperature<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Rockwell C<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">As quenched<\/td><td class=\"has-text-align-center\" data-align=\"center\">65<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">900\u00b0F\/480\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">67<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">950\u00b0F\/510\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">68<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1000\u00b0F\/540\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">67<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1050\u00b0F\/565\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">66<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1100\u00b0F\/595\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">62<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1150\u00b0F\/620\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">56<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1200\u00b0F\/650\u00b0C<\/td><td class=\"has-text-align-center\" data-align=\"center\">50<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-3-5-summary-of-m42-tool-steel-heat-treatment-parameters\">3.5 Summary of M42 Tool Steel Heat Treatment Parameters<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">To provide a quick overview, the typical parameters for M42 tool steel heat treatment are summarized below:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Stage<\/strong><\/td><td><strong>Purpose<\/strong><\/td><td><strong>Typical Temperature for M42<\/strong><\/td><td><strong>Typical Holding Time for M42<\/strong><\/td><td><strong>Key Considerations for M42<\/strong><\/td><\/tr><tr><td><strong>Preheating<\/strong><\/td><td>Minimize thermal shock, prepare for austenitizing<\/td><td>815\u00b0C (1500\u00b0F)<\/td><td>Varies based on size\/furnace<\/td><td>Gradual and uniform heating is crucial.<\/td><\/tr><tr><td><strong>Austenitizing (Hardening)<\/strong><\/td><td>Dissolve carbides, form austenite for hardening<\/td><td>1180\u00b0C \u2013 1190\u00b0C (2155\u00b0F \u2013 2175\u00b0F)<\/td><td>2-6 minutes at temperature (e.g., 4 mins soak)<\/td><td>Avoid excessive temp\/time to prevent grain growth &amp; ensure optimal carbide dissolution.<\/td><\/tr><tr><td><strong>Quenching<\/strong><\/td><td>Rapidly cool to transform austenite to hard martensite<\/td><td>Cool to handling temperature<\/td><td>Rapid<\/td><td>Air, oil, or salt bath. M42 exhibits deep hardenability. As-quenched: ~65-68 HRC.<\/td><\/tr><tr><td><strong>Tempering (Multiple)<\/strong><\/td><td>Relieve stress, increase toughness, transform retained austenite, secondary harden<\/td><td>510\u00b0C \u2013 538\u00b0C (950\u00b0F \u2013 1000\u00b0F)<\/td><td>2-4 hours per temper (2-4 tempers recommended)<\/td><td>Critical for achieving final properties (up to 69 HRC), hot hardness, and tool stability.<\/td><\/tr><tr><td><strong>Stress-Relief Temper<\/strong>&nbsp;(If needed post-machining)<\/td><td>Relieve stresses from grinding, welding, or EDM<\/td><td>14-28\u00b0C (25-50\u00b0F) below last tempering temperature<\/td><td>~1-2 hours<\/td><td>Ensures tool integrity after significant post-heat treat operations.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-applications\">4. Applications<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-1-primary-nbsp-applications-of-m42-tool-steel\">4.1 Primary&nbsp;Applications of M42 Tool Steel<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The inherent strengths of M42 tool steel make it a preferred material for various cutting tools designed for precision and longevity. Factories and machine shops frequently specify M42 for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Drills:<\/strong>&nbsp;For creating precise holes, especially in harder materials where other steels might fail prematurely.<\/li>\n\n\n\n<li><strong>End Mills:<\/strong>&nbsp;Ideal for milling operations requiring sharp, durable cutting edges that can withstand high cutting forces.<\/li>\n\n\n\n<li><strong>Reamers:<\/strong>&nbsp;Used to enlarge existing holes to precise diameters, benefiting from M42\u2019s ability to maintain tight tolerances.<\/li>\n\n\n\n<li><strong>Taps:<\/strong>&nbsp;For cutting internal threads, where wear resistance is crucial for consistent thread quality.<\/li>\n\n\n\n<li><strong>Milling Cutters:<\/strong>&nbsp;Including various types of cutters used in milling machines for shaping and material removal.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-4-2-materials-suited-for-machining-with-m42-tool-steel\">4.2 Materials Suited for Machining with M42 Tool Steel<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">M42 tool steel demonstrates excellent performance when machining a wide array of materials, particularly those that pose challenges for standard tool steels. Its high cobalt content contributes significantly to its effectiveness in these scenarios:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Material Category<\/strong><\/td><td><strong>Specific Examples &amp; Characteristics<\/strong><\/td><td><strong>Why M42 Excels<\/strong><\/td><\/tr><tr><td><strong>High Hardness Materials<\/strong><\/td><td>Materials with hardness levels exceeding 35-50 HRC.<\/td><td>Maintains cutting edge and hardness under high stress.<\/td><\/tr><tr><td><strong>Difficult-to-Machine Alloys<\/strong><\/td><td>Aerospace alloys (e.g., superalloys), heat-treated high-strength steels.<\/td><td>Superior hot hardness and wear resistance combat abrasive and tough materials.<\/td><\/tr><tr><td><strong>Stainless Steels<\/strong><\/td><td>Various grades of stainless steel.<\/td><td>Resists wear and maintains sharpness when cutting gummy or work-hardening grades.<\/td><\/tr><tr><td><strong>Non-Ferrous Metals<\/strong><\/td><td>Aluminum, Brass.<\/td><td>Provides clean cuts and extended tool life due to high wear resistance.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-equivalent-grades\">5. Equivalent grades<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DIN 17350:<\/strong>&nbsp;1.3247 \/ HS 2-9-1-8<\/li>\n\n\n\n<li><strong>JIS G4403:<\/strong>&nbsp;SKH59<\/li>\n\n\n\n<li><strong>GB\/T 1299:<\/strong>&nbsp;W2Mo9Cr4VCo8<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-ast-global-color-8-background-color has-background is-layout-constrained wp-block-group-is-layout-constrained\">\n<h2 class=\"wp-block-heading has-text-align-center\">Interested in High-Performance M42 Tool Steel?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Experience the superior wear resistance and hot hardness of M42 High-Speed Tool Steel. Ideal for demanding cutting applications, M42 delivers exceptional performance and extended tool life. Let our experts help you find the perfect M42 solution for your needs.<\/p>\n\n\n\n<p class=\"has-text-align-center has-ast-global-color-0-color has-text-color has-link-color wp-elements-e84819d574e7dbfa0a38ed5fd1605fa0 wp-block-paragraph\"><strong>Fill out the form below to get a personalized quote or expert consultation!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-leadin-hubspot-form-block\">\n\t\t\t\t\t\t<script>\n\t\t\t\t\t\t\twindow.hsFormsOnReady = window.hsFormsOnReady || [];\n\t\t\t\t\t\t\twindow.hsFormsOnReady.push(()=>{\n\t\t\t\t\t\t\t\thbspt.forms.create({\n\t\t\t\t\t\t\t\t\tportalId: 242461771,\n\t\t\t\t\t\t\t\t\tformId: \"1f7a4dcb-eb56-45e5-bd4f-5921cbf714c1\",\n\t\t\t\t\t\t\t\t\ttarget: \"#hbspt-form-1781065727000-1314619782\",\n\t\t\t\t\t\t\t\t\tregion: \"na2\",\n\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t})});\n\t\t\t\t\t\t<\/script>\n\t\t\t\t\t\t<div class=\"hbspt-form\" id=\"hbspt-form-1781065727000-1314619782\"><\/div><\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>M42 tool steel is classified as a molybdenum-based high-speed tool steel within the M series. It\u2019s a complex iron-based alloy known for its high-carbon content and the addition of various alloying elements. These alloying elements are critical because they form carbides that contribute significantly to the steel\u2019s properties, such as wear resistance and resistance to [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4845,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"landing-page","_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-9334","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - 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