USA SAE A 400 (1969), A 400 9261 Specialsteel Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | A 400 9261 | Precipitation-Hardening | SAE | USA | Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties | 
| C | Si | Mn | P | S | Ni | Cr | Al | Cu | Ti | Fe | N | Mo | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.06 | ≤0.75 | ≤0.75 | ≤ ≥ | ≤ ≥ | ≤0.50 | 25.00 -27.00 | ≤ ≥ | ≤0.20 | ≤ ≥ | ≤ ≥ | ≤0.04 | 0.75 -1.50 | 
| 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) | 
|---|---|---|---|---|---|---|
| 617 (≥) | 354 (≥) | 13 | 23 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 134 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 44 | - | - | 0.14 | - | |||
| 693 | 123 | - | 42.3 | 442 | - | ||
| 617 | - | 12 | 13.2 | 422 | 241 | 
Heat treated : 1871°C - 1719°C
| A 400 (1969) | Standard Practice for Steel Bars, Selection Guide, Composition, and Mechanical Properties | A-400-(1969).pdf | 
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