China CNS SNCM439 China Taiwan Structural steel and SNCM439 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Type | Steel Grade | Standard | Country | Application | 
|---|---|---|---|---|---|
| Steel Grades | Structure Steel | SNCM439 | CNS | China | China Taiwan Structural steel | 
| STKM18B | |||||
| STKM18C | |||||
| STKM19A | |||||
| STKM19C | |||||
| STKM20A | |||||
| SNCM220 | |||||
| SNCM240 | |||||
| SNCM415 | |||||
| SNCM420 | |||||
| SNCM431 | 
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | Mo(%) | Cu(%) | 
|---|---|---|---|---|---|---|---|---|
| 0.36-0.43 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.030 | 0.60-1.00 | 1.60-2.00 | 0.15-0.30 | 0.30 | 
| 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) | 
|---|---|---|---|---|---|---|
| 324 (≥) | 232 (≥) | 23 | 13 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 431 | 
| 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 | - | - | 0.31 | - | |||
| 551 | 285 | - | 34.3 | 111 | - | ||
| 762 | - | 34 | 43.2 | 242 | 122 | 
Heat treated : 1589°C - 1797°C
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