AISI SAE M-2 Tool Steel

1.3343 AISI M2 is a general purpose high speed steel. 1.3343 S6-5-2 high speed steel offers good wear resistance with excellent toughness and cutting power.

Forging: The forging temperature for 1.3343 high speed steel is 1050°/1150°C. Do not charge direct into the high temperature part of the furnace. Pre-heat slowly to 850°/900. The heat should then be increased more quickly to the forging temperature. If, during the forging, the temperature of the 1.3343 material drops below 880/900°C, re heating will be necessary. Cool very slowly after forging.

Annealing: Annealed at 850°C. Soak thoroughly at this temperature and furnace cool. Hardening: Pre heat slowly to 840°C/860°C and thoroughly soak. Continue heating to the final hardening temperature of 1230/1250°C and allow the  1.3343 component to be heated through. Quenching in oil or cool in air. Great care must be take not to allow the 1.3343 tools to remain too long at the hardening temperature.  

Tempering: Heat uniformly and thoroughly at the selected tempering temperature and hold for at least two hours (one hour per inch of total thickness). Double tempering of 1.3343 high speed steel is essential with intermediate cooling to room temperature between tempers.