EN31

Technical Data

EN31 is a high carbon alloy steel which achieves a high degree of hardness with compressive strength and abrasion resistance.

Forging:
Forge at 1000/1050C.  Heat slowly, allowing sufficient time at the forging temperature for the steel to be thoroughly soaked through. Re-heat as often as necessary to keep the temperature above 850C. After forging cool very slowly, preferably in a furnace. 

Annealing:
Heat uniformly to 800C, equalise, then furnace cool. (Hardness about 229 Brinell).

Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700C, equalise, then cool slowly.

Hardening:
Heat uniformly to 800/820°C until heated through. Allow 30 minutes per inch of ruling section and quench immediately in oil. 

Tempering: 
Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness.

 Available sections: