M4 Tool Steel Machinability

The high impact toughness and high transverse bend strength are results of the fine grain.

M4 tool steel machinability. Sbsm high speed steel properties comparison. Cpm rex m4 hc powder metal high speed steel. M4 is an extremely versatile high speed steel with its extremely high carbon and vanadium contents for exceptional abrasion resistance. Better annealed machinability b more consistent and safer heat treat response.

Pm steels have excellent grindability vs conventional steels. Heat treatment m4 steels can be preheated at 788 c 1450 f and then rapidly heated to 1218 c 2224 f for 3 5 minutes followed by oil salt bath or air quenching process. Form tools hobs milling cutters etc the trend is toward upgrading to cpm m4 which is the toughest high speed steel we produce and is surpassed in wear resistance only by cpm t15. Cpm rex m4 hc high speed steel is an extremely versatile high speed steel that provides a unique combination of high wear resistance with high impact toughness and transverse bend strength.

The machinability of m4 steels is comparatively low rating about 40 than that of water hardening tool steels which are much easier to machine. Pm m4 is a molybdenum tungsten high speed steel produced using the pm powdered metal steel making process. The grade has an excellent balance of toughness and wear resistance making it ideal for cutting tools and for cold work tooling. This specialty high speed steel was developed to have a greater abrasion and wear resistance for high tool life quality and cutting speeds.

There are four principal benefits of cpm high speed steels for tool users.