Komposisi Kimia
| Kelas | C% | P% | S% | Mn% | Si% | Cu% | Ni% | Co% | Fe% | |||
| Maks. 0.04 | Maks. 0.020 | Maks. 0.020 | Maks. 0.30 | Maks. 0.30 | Maks. 0.20 | Maks -0.5 | 49.0~51.0 | Bal. |
150 0000 2421