Used mainly for spring applications, 302 is chemically identical to 304 with the exception of its higher carbon content, which means that 304 also meets ASTM requirements for 302. Given the same amount of cold work, 302 is harder than 304.
| ASTM A313 | |
| Carbon | 0.12 |
| Manganese | 2.00 |
| Silicon | 1.00 |
| Phosphorus | 0.045 |
| Sulfur | 0.030 |
| Chromium | 17.0-19.00 |
| Nickel | 8.00-10.00 |
| Molybdenum | - |
| Copper | - |
| Nitrogen | 0.10 |
| Iron | Balance |
| Cobalt | - |
| %CW | Y.S. (psi) |
U.T.S. (psi) |
% Elongation (10" gauge length) |
|---|---|---|---|
| 0% | 49,000 | 106,000 | 48% |
| 20% | 125,000 | 147,000 | 9.8% |
| 37% | 169,000 | 189,000 | 3.2% |
| 50% | 196,000 | 220,000 | 2.6% |
| 60% | 222,000 | 244,000 | 2.2% |
| 68% | 243,000 | 273,000 | 2.1% |
| 75% | 251,000 | 289,000 | 2.4% |
| 80% | 282,000 | 309,000 | 2.2% |
| 84% | 295,000 | 327,000 | 2.2% |
| 87% | 300,000 | 332,000 | 2.3% |
| 90% | 319,000 | 345,000 | 2.2% |
| 92% | 322,000 | 371,000 | 2.5% |
For more detailed specifications on 302 please click here.