UK B.S. BS HR 404 (1973), BS 2HR 404 (2011), HR404 Specialsteel Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | HR404 | B.S. | UK | Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5) | 
| C | Si | Mn | P | S | Cr | Ni | Mo | Co | Ti | Fe | Al | Ag | Al+Ti | Cu | B | Bi | Pb | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.04 -0.08 | ≤0.40 | ≤0.60 | ≤ ≥ | ≤0.007 | 19.00 -21.00 | ≤remaining | 5.60 -6.10 | 19.00 -21.00 | 1.90 -2.40 | ≤0.70 | 0.30 -0.60 | ≤0.0005 | 2.40 -2.80 | ≤0.20 | ≤0.0050 | ≤0.0001 | ≤0.002 | 
| 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) | 
|---|---|---|---|---|---|---|
| 485 (≥) | 755 (≥) | 41 | 11 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 412 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 24 | - | - | 0.23 | - | |||
| 624 | 963 | - | 24.3 | 333 | - | ||
| 769 | - | 32 | 23.2 | 343 | 443 | 
Heat treated : 1636°C - 1651°C
| BS HR 404 (1973) | Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5) | BS-HR-404-(1973).pdf | 
| BS 2HR 404 (2011) | Specification for nickel-cobalt-chromium-molybdenum-titanium-aluminium heat-resisting alloy cold worked solution treated seamless tubes (nickel base, Co 20, Cr 20, Mo 5.9, Ti 2.1, Al 0.5) | BS-2HR-404-(2011).pdf | 
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