302 stainless steel has increased carbon content for higher tensile strength. This material is produced using an electric-arc melt process, resulting in a high-quality austenitic stainless steel.
Chemical composition
| Composition |
ASTM A313 |
| Carbon | 0.12 max |
| Manganese | 2.00 max |
| Phosphorus | 0.045 max |
| Sulfur | 0.030 max |
| Silicon | 1.00 max |
| Chromium | 17.0 - 19.0 |
| Nickel | 8.0 - 10.0 |
| Nitrogen | 0.10 max |
| Iron | Balance |
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*Localized variations in final melt chemistry can cause slight changes in ultimate tensile strength when 302 stainless steel is drawn to fine wire. |
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Physical properties
| Metric |
English |
|
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Density |
7.89 g/cm³ | 0.285 lbs/in³ |
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Modulus of elasticity |
193 GPa | 28 Mpsi |
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Electrical resistivity |
720 µohms*mm | 28.3 µohms*in |
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Thermal conductivity |
16.3 W/(m*°C) |
113 BTU*in/(hr*ft²*°F) |
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Coefficient of thermal expansion |
18.72 µm/(m*°C) |
10.4 µin/(in*°F) |
*Values calculated at 22 °C [72 °F]
Mechanical properties
|
Cold worked % |
Yield strength |
Ultimate tensile |
Elongation % |
| 0 | 338 MPa [49 ksi] | 731 MPa [106 ksi] | 48 |
| 20 | 862 MPa [125 ksi] | 1014 MPa [147 ksi] | 9.8 |
| 37 | 1165 MPa [169 ksi] | 1303 MPa [189 ksi] | 3.2 |
| 50 | 1351 MPa [196 ksi] | 1517 MPa [220 ksi] | 2.6 |
| 60 | 1531 MPa [222 ksi] | 1682 MPa [244 ksi] | 2.2 |
| 68 | 1675 MPa [243 ksi] | 1882 MPa [273 ksi] | 2.1 |
| 75 | 1731 MPa [251 ksi] | 1993 MPa [289 ksi] | 2.4 |
| 80 | 1944 MPa [282 ksi] | 2130 MPa [309 ksi] | 2.2 |
| 84 | 2034 MPa [295 ksi] | 2255 MPa [327 ksi] | 2.2 |
| 87 | 2068 MPa [300 ksi] | 2289 MPa [332 ksi] | 2.3 |
| 90 | 2199 MPa [319 ksi] | 2379 MPa [345 ksi] | 2.2 |
| 92 | 2220 MPa [322 ksi] | 2558 MPa [371 ksi] | 2.5 |
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*All data represent results from 25.4 cm [10 in] test gauge length. |
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