UK B.S. BS HR 40 (1972), BS 2HR 40 (2010), HR40 Specialsteel Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy billets, bars and forgings (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | HR40 | B.S. | UK | Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy billets, bars and forgings (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) | 
| C | Si | Mn | P | S | Cr | Ni | Mo | Co | Ti | Fe | W | 
|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.05 -0.15 | ≤0.40 | 1.00 -2.00 | ≤0.040 | ≤0.030 | 19.00 -21.00 | 9.00 -11.00 | ≤ ≥ | ≤remaining | ≤ ≥ | ≤3.00 | 14.00 -16.00 | 
| 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) | 
|---|---|---|---|---|---|---|
| 249 (≥) | 193 (≥) | 12 | 21 | 42 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 131 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 13 | - | - | 0.31 | - | |||
| 497 | 722 | - | 12.3 | 223 | - | ||
| 814 | - | 32 | 33.2 | 214 | 222 | 
Heat treated : 1953°C - 1978°C
| BS HR 40 (1972) | Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy billets, bars and forgings (cobalt base, Cr 20, W 15, Ni 10, Mn 1.5) | BS-HR-40-(1972).pdf | 
| BS 2HR 40 (2010) | Specification for cobalt-chromium-tungsten-nickel-manganese heat-resisting alloy billets, bars and forgings (cobalt base Cr 20, W 15, Ni 10, Mn 1.5) | BS-2HR-40-(2010).pdf | 
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