USA UNS SAE AMS 5638G (2010), SAE J 405 (1998) , 303 MA Specialsteel Steel, Corrosion-Resistant, Bars and Forgings 0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA) Free-Machining; Swaging or Upsetting Solution Heat Treated and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application | 
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | 303 MA | Austenite | UNS | USA | Steel, Corrosion-Resistant, Bars and Forgings 0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA) Free-Machining; Swaging or Upsetting Solution Heat Treated | 
| C | Si | Mn | P | S | Cr | Ni | Mo | Al | 
|---|---|---|---|---|---|---|---|---|
| ≤0.15 | ≤1.00 | ≤2.00 | ≤0.05 | 0.11 -0.16 | 17.0 -19.0 | 8.00 -10.0 | 0.40 -0.60 | 0.60 -1.00 | 
| 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) | 
|---|---|---|---|---|---|---|
| 912 (≥) | 526 (≥) | 21 | 22 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 434 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 14 | - | - | 0.23 | - | |||
| 811 | 865 | - | 44.3 | 331 | - | ||
| 318 | - | 31 | 43.2 | 132 | 333 | 
Heat treated : 1889°C - 1149°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| 303MA | 
| SAE AMS 5638G (2010) | Steel, Corrosion-Resistant, Bars and Forgings 0.14S - 18Cr - 9.5Ni - 0.50Mo - 0.80Al (303MA) Free-Machining; Swaging or Upsetting Solution Heat Treated | SAE-AMS-5638G--(2010).pdf | 
| SAE J 405 (1998) | Chemical compositions of SAE wrought stainless steels | SAE-J-405--(1998)-.pdf | 
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