USA SAE A 646/A 646M (2011), A 646 Grade Nit. 135 Specialsteel Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Class | Grade | Type | Standard | Country | Application |
---|---|---|---|---|---|---|
Steel Grades | Specialsteel | A 646 Grade Nit. 135 | Precipitation-Hardening | SAE | USA | Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings |
C | Si | Mn | Cr | Ni | Mo | Co | W | Al | Cu | Ti | Fe |
---|---|---|---|---|---|---|---|---|---|---|---|
0.38 -0.43 | 0.20 -0.40 | 0.50 -0.70 | ≤ ≥ | 0.30 -0.40 | ≤ ≥ | ≤ ≥ | 0.95 -1.30 | ≤ ≥ | ≤ ≥ | ≤ ≥ | ≤ ≥ |
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) |
---|---|---|---|---|---|---|
595 (≥) | 991 (≥) | 11 | 23 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 332 |
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 |
---|---|---|---|---|---|---|---|
13 | - | - | 0.14 | - | |||
259 | 173 | - | 41.3 | 412 | - | ||
155 | - | 41 | 13.2 | 432 | 342 |
Heat treated : 1826°C - 1158°C
A 646/A 646M (2011) | Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings | A-646-A-646M-(2011).pdf |
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