USA AMS SA-479/SA-479M, SA-479 S32550 Specialsteel Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | SA-479 S32550 | Duplex steel | AMS | USA | Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels | 
| C | Mn | Si | P | S | Cr | Ni | Mo | Cu | N | 
|---|---|---|---|---|---|---|---|---|---|
| ≤0.04 | ≤1.50 | ≤1.00 | ≤0.04 | ≤0.03 | 24.00 -27.00 | 4.50 -6.50 | 2.90 -3.90 | 1.50 -2.50 | 0.10 -0.25 | 
| 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) | 
|---|---|---|---|---|---|---|
| 557 (≥) | 954 (≥) | 31 | 11 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 222 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 33 | - | - | 0.11 | - | |||
| 823 | 965 | - | 14.3 | 333 | - | ||
| 885 | - | 31 | 32.2 | 433 | 311 | 
Heat treated : 1488°C - 1512°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| 1.2550 | |||
| 1.2552 | |||
| 1.3255 | |||
| StE 255 | |||
| S255N | |||
| WStE 255 | |||
| S255NH | |||
| TStE 255 | |||
| S255NL | |||
| EStE 255 | |||
| S255NL1 | |||
| E255 | |||
| 255 | |||
| S32550 | |||
| Ferralium alloy 255 | |||
| Ferralium alloy 255/SD40 | |||
| Ferralium alloy 255/SD50 | |||
| Ferralium alloy 255-3 SC | |||
| Ferralium alloy 255-3 SF | |||
| SM 2550 | 
| SA-479/SA-479M | Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels | SA-479-SA-479M.pdf | 
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