Japan JIS SUS631 precipitation-hardening stainless and SUS631 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Special Steel | SUS631 | JIS | Japan | precipitation-hardening stainless | 
| SUS420J1 | |||||
| SUS420J2 | |||||
| SUS420F | |||||
| SUS420F2 | |||||
| SUS431 | |||||
| SUS440A | |||||
| SUS440B | |||||
| SUS440C | |||||
| SUS440F | |||||
| SUS630 | 
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | 
|---|---|---|---|---|---|---|
| Max 0.09 | Max 1.00 | Max 1.00 | Max 0.04 | Max 0.03 | 16.0-18.0 | 6.50-7.75 | 
| 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) | 
|---|---|---|---|---|---|---|
| 921 (≥) | 554 (≥) | 11 | 24 | 42 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 111 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 22 | - | - | 0.32 | - | |||
| 654 | 213 | - | 31.3 | 224 | - | ||
| 984 | - | 21 | 14.2 | 244 | 141 | 
Heat treated : 1446°C - 1272°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| SUS631 | JIS | Japan | precipitation-hardening stainless | 
| SUS631-CPS | JIS | Japan | stainless steel | 
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