Korea KS STS420J2 martensitic steel and STS420J2 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Heat-Resistant Steel | STS420J2 | KS | Korea | martensitic steel | 
| STS430F | |||||
| STS434 | |||||
| STS447J1 | |||||
| STSXM27 | |||||
| STS403 | |||||
| STS410 | |||||
| STS41oJl | |||||
| STS41OF2 | |||||
| STS416 | |||||
| STS420J1 | 
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | 
|---|---|---|---|---|---|---|
| 0.26-0.40 | Max 1.00 | Max 1.00 | Max 0.04 | Max 0.03 | 12.0-14.0 | Max 0.60 | 
| 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) | 
|---|---|---|---|---|---|---|
| 864 (≥) | 668 (≥) | 32 | 21 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 333 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 14 | - | - | 0.33 | - | |||
| 961 | 567 | - | 13.3 | 123 | - | ||
| 645 | - | 24 | 12.2 | 312 | 113 | 
Heat treated : 1279°C - 1636°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| STS420J2 | KS | Korea | martensitic steel | 
| STS420J2 | KS | Korea | martensitic steel | 
| STS420J2TKA | KS | Korea | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) | 
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