|
Chemical composition |
Maximum percent allowable |
| Carbon |
0.24% ( 0.28%)
(0.28% for head and trunnion) |
| Manganese | 0.90% |
| Silicon | 0.30-0.45% |
| Sulfur | 0.025% |
| Phosphorus | 0.025% |
| Nickel | 0.25% |
| Chromium | 0.20% |
| Molybdenum | 0.15% |
| Cooper | 0.20% |
| Vanadium | 0.03% |