Korea KS D 3691 (2001), STS630FB Specialsteel Stainless steel blooms and billets for forgings and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | STS630FB | Precipitation-Hardening | KS | Korea | Stainless steel blooms and billets for forgings | 
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu | Nb | 
|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.07 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 15.00 -17.00 | 3.00 -5.00 | ≤ ≥ | ≤ ≥ | 3.00 -5.00 | 0.15 -0.45 | 
| 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) | 
|---|---|---|---|---|---|---|
| 523 (≥) | 978 (≥) | 22 | 21 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 341 | 
| 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 | - | - | 0.23 | - | |||
| 394 | 985 | - | 41.3 | 442 | - | ||
| 942 | - | 24 | 31.2 | 231 | 312 | 
Heat treated : 1619°C - 1944°C
| D 3691 (2001) | Stainless steel blooms and billets for forgings | D-3691-(2001).pdf | 
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