Chemical composition
| element | min% | max% | |
|---|---|---|---|
| P | 0,045 | ||
| S | 0,045 | ||
| N | 0,009 |
Comparative chart
international standards
| Nation | Standard |
| Bulgary | Ast6 WSt6sp |
| Czech/Slovak Republic | 11600 |
| Europa | E335 Fe 60-2 FN |
| Germany | St 60-2 E335 |
| France | A60-2 |
| Great Britan | E335 |
| Hunghery | Fe 590-2 |
| Italy | Fe 590 E335 |
| Polon | St6 MSt6 |
| Rumania | OL 60.1 |
| Japon | SM 58 |
| Russia | St6ps |
| Spain | A 590 |
| Sveden | 1650 |
| China | HRB335 |