A194 Chemical Properties
| Element | 2, 2H, and 2HM | 4 | 7 and 7M (AISI 4140) | 8 (AISI 304) | 8M (AISI 316) |
|---|---|---|---|---|---|
| Carbon | 0.40% min | 0.40 - 0.50% | 0.37 - 0.49% | 0.08% max | 0.08% max |
| Manganese | 1.00% max | 0.70 - 0.90% | 0.65 - 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.040% | 0.035% | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.050% | 0.040% | 0.040% | 0.030% | 0.030% |
| Silicon | 0.40% max | 0.15 - 0.35% | 0.15 - 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 - 1.20% | 18.0 - 20.0% | 16.0 - 18.0% | ||
| Nickel | 8.0 - 11.0% | 10.0 - 14.0% | |||
| Molybdenum | 0.20 - 0.30% | 0.15 - 0.25% | 2.00 - 3.00% |