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Chemical Composition (in weight %) of 86CrMoV7
C |
Si |
Mn |
Cr |
Mo |
Ni |
V |
W |
Others |
0.87 |
0.30 |
0.38 |
1.75 |
0.28 |
0.13 |
0.10 |
- |
- |
Description
Low alloyed cold working tool steel.
Applications
Cold rolls, back-up rolls, straightening rolls, non-ferrous 2 and 4 high roll mills.
Soft Annealing
Heat to 720-750oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 230.
Stress Relieving
Stress relieving to remove machining stresses should be carried out by heating to approx. 650oC, holding for 1-2 hours at heat, followed by air cooling. This operation is performed to reduce distortion during heat treatment.
Hardening
Harden from a temperature of 800-820oC, 830-850oC followed by water or oil quenching. Hardness after quenching is 64-67 HRC.
Tempering
Tempering temperature: 200-600oC.
Tempering Temperature (oC) vs. Hardness (HRC)
100oC |
200oC |
300oC |
400oC |
65 |
61 |
58 |
- |
Forging
Hot forming temperature: 1150-850oC.