UK B.S. BS 3S 61 (1964), 3S.61 Specialsteel Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (35/45 tonf/sq in: limiting ruling section 6 in) and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application |
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | 3S.61 | B.S. | UK | Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (35/45 tonf/sq in: limiting ruling section 6 in) |
| C | Si | Mn | P | S | Cr | Ni | Mo | Nb/Ti |
|---|---|---|---|---|---|---|---|---|
| ≤0.12 | ≤0.80 | ≤1.00 | ≤0.030 | ≤0.025 | 11.50 -13.50 | ≤1.00 | ≤ ≥ | ≤ ≥ |
| 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) |
|---|---|---|---|---|---|---|
| 151 (≥) | 996 (≥) | 33 | 12 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 142 |
| 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 |
|---|---|---|---|---|---|---|---|
| 23 | - | - | 0.41 | - | |||
| 434 | 348 | - | 23.3 | 244 | - | ||
| 115 | - | 21 | 13.2 | 322 | 334 |
Heat treated : 1848°C - 1534°C
| BS 3S 61 (1964) | Specification for aircraft material. 12 per cent chromium corrosion-resisting steel (35/45 tonf/sq in: limiting ruling section 6 in) | BS-3S-61-(1964).pdf |
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