| Elfen | Ni +Co | Cr | Nb | Ti | C | Mn | Si | Cu | Al | S | Haearn |
| Cyfansoddiad Cemegol (%) | 70% Isafswm | 14%-17% | 0.7%-1.2% | 2.25%-2.75% | Uchafswm o 0.08% | Uchafswm o 1% | Uchafswm o 0.5% | Uchafswm o 0.30% | 0.4%-1.0% | Uchafswm o 0.01% | 5%-9% |
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