UK BM4 Carbide for cutting tools and BM4 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Type | Steel Grade | Standard | Country | Application |
---|---|---|---|---|---|
Steel Grades | Tool Steel And Hard Alloy | BM4 | UK | Carbide for cutting tools | |
BT20① |
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BT20① |
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BT20① |
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BT20① |
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BT21 |
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BT21 |
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BT42 |
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BM2 |
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BM2 |
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BM4 |
C(%) | Si(%) | Mn(%) | Cr(%) | Ni(%) | Mo(%) | V(%) | W(%) | Co(%) | Other(%) |
---|---|---|---|---|---|---|---|---|---|
1.25-1.40 | ≤0.40 | ≤0.40 | ≤1.00 | ≤0.40 | 4.25-5.00 | 3.75-4.25 | 5.75-6.50 | ≤1.00 | Cu≤0.20,Sn≤0.05 |
Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
---|---|---|---|---|---|---|
366 (≥) | 242 (≥) | 31 | 41 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 441 |
Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
---|---|---|---|---|---|---|---|
42 | - | - | 0.41 | - | |||
893 | 421 | - | 12.3 | 341 | - | ||
687 | - | 31 | 43.2 | 122 | 213 |
Heat treated : 1976°C - 1575°C
Grade | Standard | Country | Application |
---|---|---|---|
BM4 | UK | Carbide for cutting tools | |
BM4 | UK | Carbide for cutting tools | |
BM42 | UK | Carbide for cutting tools | |
BM42 | UK | Carbide for cutting tools |
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