UK B.S. BS HR 402 (1973), BS 2HR 402 (2011), HR402 Specialsteel Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy seamless tubes (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | HR402 | B.S. | UK | Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy seamless tubes (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) | 
| C | Si | Mn | P | S | Cr | Ni | Mo | Co | Ti | Fe | Al | Cu | Zr | B | Bi | Pb | Ag | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.13 | ≤1.00 | ≤1.00 | ≤ ≥ | ≤0.015 | 18.00 -21.00 | ≤remaining | ≤ ≥ | 15.00 -21.00 | 2.00 -3.00 | ≤1.50 | 1.00 -2.00 | ≤0.20 | ≤0.15 | ≤0.02 | ≤0.0001 | ≤0.002 | ≤0.0005 | 
| 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) | 
|---|---|---|---|---|---|---|
| 883 (≥) | 599 (≥) | 12 | 43 | 33 | 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 | 
|---|---|---|---|---|---|---|---|
| 31 | - | - | 0.13 | - | |||
| 424 | 128 | - | 42.3 | 343 | - | ||
| 278 | - | 43 | 43.2 | 124 | 424 | 
Heat treated : 1838°C - 1395°C
| BS HR 402 (1973) | Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy cold worked and softened seamless tubes (nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) | BS-HR-402-(1973).pdf | 
| BS 2HR 402 (2011) | Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy seamless tubes (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5) | BS-2HR-402-(2011).pdf | 
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