| C | Si | Ni | Co | Al | Fe | Mn | Cr | Mo | Ti | B |
| 0.06 - 0.12 | 0.20 max | Bal | 10-12 | 1.4-1.6 | 5.0 max | 0.1 max | 18-20 | 9.0-10.5 | 3-3.3 | 0.003-0.01 |
| Material | Tensile Strength ksi | Yield Strength ksi | Elongation in 4D | Reduction of Area | Hardness |
| Rene 41 (R41) Solution Treated Bar | 363 HB max | ||||
| Rene 41 (R41) Solution Treated Aged Bar | 170 | 130 | 8 | 10 | 311 HB min |
| Rene 41 (R41) Solution Treated Sheet | 170 max | 100 max | 30 max | 30HRC max | |
| Rene 41 (R41) Solution Treated Aged Sheet | 170 min | 130 min | 10 min | 35 HRC min |