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EN31
Technical Data
EN31 is a high carbon alloy steel which achieves a high degree of hardness with compressive strength and abrasion resistance.
TYPICAL ANALYSIS
C.
Mn.
Cr.
Si.
1.00%
0.50%
1.40%
0.20%
Forging:
Forge at 1000°/1050°C. 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 850°C. After forging cool very slowly, preferably in a furnace.
Annealing:
Heat uniformly to 800°C, 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 700°C, 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.
Tempering °C
100
150
200
250
300
350
HRc
64/63
63/62
62/61
60/59
57/56
54/53
Available sections: