| Iron, Fe | 49 |
| Nickel, Ni | 48 |
| Cobalt, Co | 1 |
| Manganese, Mn | 0.80 |
| Silicon, Si | 0.30 |
| Chromium, Cr | 0.25 |
| Aluminum, Al | 0.10 |
| Carbon, C | 0.050 |
| Phosphorous, P | 0.025 |
| Sulfur, S | 0.025 |
| Material | Ultimate Tensile Strength | Yield Strength 0.2 % | Elongation (%) | ||
| psi | MPa | psi | MPa | ||
| Alloy 48 | 75,000 | 520 | 38,000 | 260 | 43 |