| El grado | N | C | H | Fe | O. | Al. | V | Pa | Mo | Ni | Ti |
| Gr1 | 0.03 | 0.08 | 0.015 | 0.2 | 0.18 | / | / | / | / | / | Bal |
| Gr2 | 0.03 | 0.08 | 0.015 | 0.3 | 0.25 | / | / | / | / | / | Bal |
| Gr3 | 0.05 | 0.08 | 0.015 | 0.3 | 0.35 | / | / | / | / | / | Bal |
| Gr4 | 0.05 | 0.08 | 0.015 | 0.5 | 0.4 | / | / | / | / | / | Bal |
| Gr5 | 0.05 | 0.08 | 0.015 | 0.4 | 0.2 | 5.5-6.75 | 3.5-4.5 | / | / | / | Bal |
| Gr7 | 0.03 | 0.08 | 0.015 | 0.3 | 0.25 | / | / | 0.12-0.25 | / | / | Bal |
| Gr9 | 0.03 | 0.08 | 0.015 | 0.25 | 0.15 | 2.5-3.5 | 2.0-3.0 | / | / | / | Bal |
| Gr12 | 0.03 | 0.08 | 0.015 | 0.3 | 0.25 | / | / | / | 0,2-0,4 | 0,6-0,9 | Bal |
| Material | Fuerza tensil MPa | La elongacióN % | La reduccióN de la zona % |
| GR1 | >=240 | >=24 | >=30 |
| GR2 | >=400 | >=20 | >=30 |
| GR3 | >=500 | >=18 | >=30 |
| GR4 | >=580 | >=15 | >=25 |
| GR5 | >=895 | >=10 | >=25 |
| GR5ELI | >=825 | >=8 | >=15 |