UK B.S. BS 2S 129, S.129 Specialsteel Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | S.129 | B.S. | UK | Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm) | 
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | 
|---|---|---|---|---|---|---|---|---|
| ≤0.12 | 0.20 -1.00 | 0.50 -2.00 | ≤0.035 | ≤0.025 | 17.00 -19.00 | 8.00 -11.00 | ≤ ≥ | ≤5×C | 
| 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) | 
|---|---|---|---|---|---|---|
| 849 (≥) | 888 (≥) | 11 | 44 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 231 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 33 | - | - | 0.43 | - | |||
| 683 | 269 | - | 13.3 | 231 | - | ||
| 252 | - | 43 | 23.2 | 113 | 224 | 
Heat treated : 1724°C - 1267°C
| BS 2S 129 | Specification for 18/9 chromium-nickel corrosion-resisting steel (titanium stabilized) billets, bars, forgings and parts (540 MPa: limiting ruling section 150 mm) | BS-2S-129.pdf | 
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