Ferosíra
| prvek | obsah |
|---|---|
| S | 39-41 min. |
| Fe | 51-54% max. |
| C | 0,4-0,6 |
| P | 0,02% max. |
| O | 5-6% max. |
| SiO2 | 0,8-1% max. |
| Al2O3 | 3-8% max. |
| Kusovost | 10-50 mm |
| prvek | obsah |
|---|---|
| S | 39-41 min. |
| Fe | 51-54% max. |
| C | 0,4-0,6 |
| P | 0,02% max. |
| O | 5-6% max. |
| SiO2 | 0,8-1% max. |
| Al2O3 | 3-8% max. |
| Kusovost | 10-50 mm |