China GB GB/T 1221 (1992) , GB/T 12773 (1991) , 4Cr10Si2Mo Specialsteel Heat-resisting steel bars and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Class | Grade | Type | Standard | Country | Application |
---|---|---|---|---|---|---|
Steel Grades | Specialsteel | 4Cr10Si2Mo | Martensite | GB | China | Heat-resisting steel bars |
C | Si | Mn | P | S | Cr | Mo |
---|---|---|---|---|---|---|
0.35 -0.45 | 1.90 -2.60 | ≤0.70 | ≤0.035 | ≤0.60 | 9.00 -10.50 | 0.70 -0.90 |
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) |
---|---|---|---|---|---|---|
913 (≥) | 551 (≥) | 42 | 31 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 121 |
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 |
---|---|---|---|---|---|---|---|
34 | - | - | 0.12 | - | |||
789 | 786 | - | 12.3 | 114 | - | ||
614 | - | 41 | 23.2 | 223 | 243 |
Heat treated : 1933°C - 1143°C
GB/T 1221 (1992) | Heat-resisting steel bars | GB-T-1221--(1992)-.pdf |
GB/T 12773 (1991) | Valve steel bars for internal combustion engines - Technical requirements | GB-T-12773--(1991)-.pdf |
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