USA SAE A 959 (2011), A 959 Type 29-4-2 Specialsteel Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | A 959 Type 29-4-2 | Precipitation-Hardening | SAE | USA | Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels | 
| C | Si | Mn | P | S | Ni | Cr | Al | Cu | Ti | Fe | N | Mo | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.01 | ≤0.20 | ≤0.30 | ≤ ≥ | ≤ ≥ | ≤0.15 | 28.00 -30.00 | ≤ ≥ | ≤0.15 | ≤ ≥ | ≤ ≥ | ≤0.02 | 3.50 -4.20 | 
| 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) | 
|---|---|---|---|---|---|---|
| 331 (≥) | 355 (≥) | 11 | 41 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 132 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 21 | - | - | 0.31 | - | |||
| 281 | 326 | - | 31.3 | 412 | - | ||
| 132 | - | 31 | 24.2 | 443 | 343 | 
Heat treated : 1127°C - 1188°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| 29-4 | |||
| 29-4C | |||
| 29-4-2 | |||
| 29-4 | |||
| 29-4-2 | |||
| 29-4C | |||
| 29-4 | |||
| 29-4-2 | |||
| 29-4 | |||
| 29-4-2 | |||
| 29-4C(S44735) | |||
| 29-4-2(S44800) | |||
| X2CrMoTi29-4 | |||
| X2CrMoTi29-4 | 
| A 959 (2011) | Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels | A-959-(2011).pdf | 
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