UK B.S. BS 2S 131, 2S.131 Specialsteel Specification for high thermal expansion steel billets, bars, forgings and parts (620 MPa: limiting ruling section 150 mm) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | 2S.131 | B.S. | UK | Specification for high thermal expansion steel billets, bars, forgings and parts (620 MPa: limiting ruling section 150 mm) | 
| C | Si | Mn | P | S | Cr | Ni | Mo | W | V | 
|---|---|---|---|---|---|---|---|---|---|
| 0.55 -0.70 | 0.20 -0.50 | 3.50 -5.50 | ≤0.035 | ≤0.025 | 3.00 -4.00 | 11.00 -14.00 | ≤0.50 | ≤1.00 | ≤0.25 | 
| 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 (≥) | 644 (≥) | 14 | 24 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 422 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 32 | - | - | 0.31 | - | |||
| 114 | 617 | - | 14.3 | 333 | - | ||
| 819 | - | 33 | 41.2 | 132 | 223 | 
Heat treated : 1228°C - 1529°C
| BS 2S 131 | Specification for high thermal expansion steel billets, bars, forgings and parts (620 MPa: limiting ruling section 150 mm) | BS-2S-131.pdf | 
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