M2 （W6Mo5Cr4V2 ，SKH51, 1.3343） High-Speed Steel

M2 (W6Mo5Cr4V2 or SKH51) (high-speed steel) is characterized by its high toughness, good wear resistance and low carbide inhomogeneity. As such is best suited for cutting tools and molds under vibration and shock loads.

M2 is from the molybdenum series characterized with high toughness and uniform carbides. It is prone to face high temperature, so quenching temperature control and heat treatment protection is extremely important. It is commonly used for difficult cutting tool materials because of its hardness and wear resistance.

Similar Grade

Main Chemical Composition%

Size

• • • Round Bar/mm

• • • Specification for Hot-rolled flat bar in common use/mm (black surface)

M2 High-Speed Steel Heat Treatment Process

Hardening and tempering of M2 high-speed steel has played an important role in improving its hardness, wearresistance. and toughness. The typical heat treatment for M2 high-speed steel generally follows an Anneal, Quench, and a Temper process scheme. Here is the detailed explanation for each step:

1. Annealing：

   Basically, to soften the steel by relieving stress and make it easier to machine.

2. Quenching：

   A process of heat treatment to increase hardness and wear resistance by rapidly cooling the steel.

3. Tempering：

   When using M2 steel, tempering follows quenching in order to relieve stress and fine-tune hardness and toughness for optimum performance.

Heat treatment process reference

HSS M2 Isothermal spheroidizing

Annealing–Quenching-Tempering graph (HRC：62-64）

After Heat Treatment, Performance

The following properties can be obtained after proper heat treatment on M2 high-speed steel:

• Very Strong Hardness：

  Hardness 62-64 HRC Shape cutting tasks.

• Fantastic Wear Resistance：

  The quenching and tempering process puts them in a condensed matrix, very suitable for high-freguency and long-term cut.

• Stable Toughness：

  The tempering process eliminates internal stress, increases impact resistance for complexmachining and heavy-duty applications.

How to maintain?

• Control Cooling Speed：

  Strictly control the cooling speed at quenching, to avoid true hardness uneven hardness or cracking caused by too fast or too slow cooling.

• Multiple Tempering Cycles：

  At least two tempering cycles, then internal stress will be fully released and also improve toughness.

• Avoid Excessive Temperatures：

  keep the temperature under control within reasonable bounds during the whole heat treatment，do not allow to go critical condition that will cause the grain coarsening or performance degradation.

Why Choose Our M2 High Speed Steel?

• Better value for money

  • Same Quality, Lower Price:

    M2 high-speed steel, the same quality but competitively priced: We are able to offer similar quality to Japanese, European and American brands at a lower price. Which it does through exacting smelting and rigid quality control.

• Advanced Production Equipment
  • Leading Smelting Process:

    EAF+LF+VD+RS ESR, with more uniform microstructure and more fine carbide particles thus better toughness and wear resistance.

  • Advanced Heat Treatment:

    Heat treatment technology that greatly improves toughness and hardness for superb wear resistance.

• Stable Product Quality

  • Consistent Material Quality：

    We have control of the entire production process from the raw materials production to final production as a result, we assure the consistent quality of the material.

  • International Standards Compliant：

    M2 high-speed steel produced by our company conforms to international standards including: GB/T 9943-2008, AISI M2, JIS SKH51 and DIN 1.3343.

• Technical Expertise

  • Research and Development：

    Our company is under the National Ministry of Science and Technology “13th Five-Year Plan”; it can get government funding and subsidies.

  • Our unique technology：

    In line with our own actual conditions, we have developed a domestic unique rapid solidification electro-slag remelting (RS ESR) process (joint research with Shanghai University and Beijing Iron & Steel Research Institute), which can effectively improve the purity and carbide distribution of materials.

  • Spray Forming HSS：

    In collaboration with Baosteel Group, we innovated the proprietary powder injection molding of Spray Forming High-Speed Steel, which only our factory in China can implement.

Microstructure

Surface condition

• Application:

Applicable to the production of drill, tap, screw die, milling cutter, gear cutter, cold die mold and other cutting tools, and molds with high wear resistance and strength.

• Cutting Tools:

  Best suited for the manufactur of high performance punch,taps,drills, reamers and milling cutters etc.

• Machinability：

  Suitable for high-speed metal machining, as its properties guarantee high-quality and precise operation.

• Industrial Equipment：

  Used in different industrial applications where wear resistance and high strength are important.

FAQ

• What differentiates M2 high speed steel from other high speed steel?

M2 high speed steel has better toughness, impact and vibration resistance than other high speed steel types, and has a more uniform carbide distribution. Moreover, it also has good wear resistance, which is why it is ideal for manufacturing the cutting tools with high performance.

• Can you do the customization of your M2 high speed steel products?

Yes, we do provide custom service for M2 high speed steel. Whether Raw materials, semi-finished products or finished products, our products can be customized according to the specific size and needs of customers, and ensure that products can be perfectly adapted to your production found.

• What is M2 high speed steel, and how do I select the right specification for my application?

We can offer professional advice for different applications with our customers and help select proper M2 high speed steel specifications. We will customize according to your requirements, and size and machining requirements can be given if you have special requirements.

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