UK B.S. BS 970-4, 349S54 Specialsteel Specification for wrought steels for mechanical and allied engineering purposes. Valve steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Class | Grade | Standard | Country | Application |
---|---|---|---|---|---|
Steel Grades | Specialsteel | 349S54 | B.S. | UK | Specification for wrought steels for mechanical and allied engineering purposes. Valve steels |
C | Si | Mn | P | S | Cr | Ni | Mo | N | C+N |
---|---|---|---|---|---|---|---|---|---|
0.48 -0.58 | ≤0.25 | 8.00 -10.00 | ≤0.040 | 0.035 -0.080 | 20.00 -22.00 | 3.25 -4.50 | ≤ ≥ | 0.38 -0.50 | 0.90 - ≥ |
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) |
---|---|---|---|---|---|---|
851 (≥) | 659 (≥) | 32 | 44 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 344 |
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 |
---|---|---|---|---|---|---|---|
41 | - | - | 0.22 | - | |||
768 | 844 | - | 11.3 | 222 | - | ||
477 | - | 32 | 34.2 | 441 | 241 |
Heat treated : 1337°C - 1559°C
BS 970-4 | Specification for wrought steels for mechanical and allied engineering purposes. Valve steels | BS-970-4.pdf |
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