Key Specifications/Special Features:
Description
Low alloyed cold working tool steel.
Applications
Cold rolls, back-up rolls, straightening rolls, non-ferrous-2 and 4 high roll mills.
Chemical Composition (in weight%)
C 0.87
Si 0.30
Mn 0.38
Cr 1.75
V 0.10
Mo 0.28
Ni 0.13
Physical properties (average values) at ambient temperature
Modulus of elasticity [103xN/mm2]: 210
Density [g/cm3]: 7.85
Thermal conductivity [W/m. K]: 35.0
Electric resistivity [Ohm mm2/m]: 0.30
Specific heat capacity [J/g. K]: 0.46
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 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 oil or water quenching. Hardness after quenching is 64-67 HRC.
Tempering
Tempering temperature: 200-600ºC
Forging
Hot forming temperature: 1150-850ºC.
Specifications:
Grade: 86CrMoV7
Standard: DIN, GB
Diameter: 50-500mm
Certification: ISO
Technical treatment: cold-rolled and hot rolled
Packing and delivery
Packing: standard export seaworthy package or as customers' requirements.
Delivery: 7-20 days after received deposit of T/T.
| C |
Mn |
Si |
P |
S |
Cr |
Ni |
Mo |
| 0.03 |
0.5 |
0.5 |
0.02 |
0.005 |
11.5~13.5 |
4.5~6.5 |
1.5~3.5 |
Mechanical behavior
State: hardening and tempering state. The supply status is typically 95 or 110 ksi, 0.2% yield strength
Extreme tensile strength: 115 ksi or more (792N / mm2)
0.2% Yield point: 110 ksi or more (758 N / mm2)
Elongation: 15%
V-notch impact strength (-10 ° C): 78 Joules (60ft-lbf)
Hardness: 33%
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