{"id":9340,"date":"2025-08-02T11:32:18","date_gmt":"2025-08-02T03:32:18","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=9340"},"modified":"2026-04-26T00:11:23","modified_gmt":"2026-04-25T16:11:23","slug":"m35-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/m35-tool-steel\/","title":{"rendered":"M35 Tool Steel | 1.3243 | SKH55"},"content":{"rendered":"
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Home<\/mark> <\/a>> Tool Steel Catalog<\/mark> <\/u><\/a>> M35 Tool Steel<\/h6><\/div>\n\n\n\n
Aobo Steel | Global Tool Steel Supplier in China<\/em><\/h5><\/div>\n\n\n\n

AISI M35 Tool Steel | 1.3243 | SKH55 Cobalt High Speed Steel (HSS-Co)<\/h2><\/div>\n\n\n\n
\u2713100% UT Tested Quality Assurance<\/h5><\/div>\n\n\n\n
\u2713SEP 1921-82 Class D\/d Guaranteed<\/h5><\/div>\n\n\n\n
\u2713Annealed State Delivery<\/h5><\/div>\n\n\n\n
\u2713Surface: Black Scale, Turned, Mill Finish, or Polished<\/h5><\/div>\n\n\n\n
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Quick Inquiry For M35 Material<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n
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M35 tool steel is a Cobalt-bearing molybdenum high-speed steel. Its composition, specifically the Cobalt addition, leads to higher temper hardness, wear resistance, and hot hardness compared to M2 tool steel<\/mark><\/a><\/em>, enabling higher cutting speeds.<\/p>\n\n\n\n

1. Chemical composition<\/h2>\n\n\n\n

The M35 steel we provide fully meets the standard requirements. Due to its cobalt content, M35 steel has some special properties compared to other ordinary tool steels. Its composition table is as follows:<\/p>\n\n\n\n

Element<\/td>Carbon<\/td>Chromium<\/td>Molybdenum<\/td>Tungsten<\/td>Vanadium<\/td>Cobalt<\/td>Manganese<\/td>Silicon<\/td><\/tr>
Composition (%)<\/td>0.80\u20130.90<\/td>3.75\u20134.50<\/td>4.50\u20135.50<\/td>5.50\u20136.75<\/td>1.75\u20132.20<\/td>4.50\u20135.50<\/td>0.20\u20130.45<\/td>0.20\u20130.45<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

2. Properties of M35 Tool Steel<\/h2>\n\n\n\n

The specific blend of elements in M35 tool steel translates into a set of performance characteristics that are highly valued in various tooling applications.<\/p>\n\n\n\n

2.1 Enhanced Hardness and Tempering <\/em>Response<\/h3>\n\n\n\n

A critical aspect of M35 tool steel properties is its superior hardness. The 5% cobalt content is instrumental here, not only increasing the achievable hardness compared to standard M2 grades but also significantly intensifying the steel\u2019s response during the tempering process.\u00a0<\/p>\n\n\n\n

2.2 Exceptional Wear Resistance<\/h3>\n\n\n\n

The operational lifespan and efficiency of tooling are directly linked to wear resistance. M35 tool steel demonstrates exceptional performance in this regard. The higher hardness, a direct result of its cobalt alloying and optimized carbide structure, provides robust resistance against abrasive wear. This means M35 tools will last longer, reducing downtime and replacement costs.<\/p>\n\n\n\n

2.3 Superior Hot Hardness (Red Hardness)<\/h3>\n\n\n\n

One of the most significant M35 tool steel properties is its excellent hot hardness, often referred to as red hardness. This is a direct benefit of the cobalt addition. This characteristic is vital for applications involving high cutting speeds and feeds, where tools are subjected to considerable heat generation. M35 maintains its strength and hardness at these elevated temperatures, allowing machining operations to run at higher speeds and feeds, thereby boosting productivity without prematurely compromising tool integrity.<\/p>\n\n\n\n

2.4 Balancing Toughness<\/h3>\n\n\n\n

While M35 tool steel is engineered for high hardness and wear resistance, it also offers a commendable level of toughness. This is particularly noticeable when compared to some other highly wear-resistant high-speed steels. This toughness allows M35 tools to withstand a degree of mechanical stress and impact during operation. While for applications requiring extreme shock resistance, other grades might be considered, M35 provides a well-rounded profile suitable for a broad array of cutting and forming tools where a balance of wear resistance and toughness is needed. It\u2019s generally regarded as tougher than T15, though its shock resistance is slightly less than that of M42.<\/p>\n\n\n\n

2.5 Favorable Grindability<\/h3>\n\n\n\n

The ease of tool fabrication and subsequent maintenance, such as regrinding, is an important practical consideration. The grindability of M35 tool steel is quite good, generally similar to that of M2 high-speed steel. The distribution of undissolved carbides in M35 is such that the added vanadium does not negatively impact its grindability to the extent it might in other high-vanadium grades like M3. This facilitates easier and more efficient tool sharpening and shaping processes.<\/p>\n\n\n\n

2.6 Physical Properties<\/h3>\n\n\n\n
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  • Density:<\/strong> Approximately 8.3-8.5 g\/cm\u00b3<\/li>\n\n\n\n
  • Melting Point:<\/strong> Approximately 1420-1450\u00b0C<\/li>\n\n\n\n
  • Thermal Conductivity:<\/strong> Approximately 20-25 W\/(m\u00b7K)<\/li>\n\n\n\n
  • Thermal Expansion Coefficient:<\/strong> Approximately 11-13\u00d710\u207b\u2076\/\u00b0C<\/li>\n\n\n\n
  • Elastic Modulus:<\/strong> Approximately 210-220 GPa<\/li>\n<\/ul>\n\n\n\n

    2.7 Mechanical Properties<\/h3>\n\n\n\n
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    • M35 material hardness after\u00a0<\/strong>heat treatment:<\/strong>\u00a0HRC 65-67 (quenching\u00a0+ multiple tempering).<\/li>\n\n\n\n
    • High-Temperature Hardness:<\/strong> At 600\u00b0C, it still maintains HRC 54-58 (cobalt improves red hardness).<\/span><\/li>\n\n\n\n
    • Tensile Strength:<\/strong> Approximately 2000-2500 MPa<\/li>\n\n\n\n
    • Toughness:<\/strong> Impact toughness is low (approximately 4-8 J\/cm\u00b2),<\/li>\n\n\n\n
    • Wear Resistance:<\/strong> Excellent, especially for high-speed cutting and processing of high-hardness materials (such as stainless steel and titanium alloys).<\/li>\n\n\n\n
    • Compressive Strength:<\/strong> Approximately 3000-3500 MPa<\/li>\n<\/ul>\n\n\n\n
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      M35 tool steel<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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      Are you looking for M35 high-speed steel? Please fill out the following form to contact us now!<\/strong><\/p>\n\n\n\n

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