Material properties - Steel Screws and Bolts - ISO 898 pt 1 EN 20898 pt 1
| Property class | Material/treatment | Chemical composition (%) | ||
|---|---|---|---|---|
| C (max.) | P (max.) | S (max.) | ||
| 4.6, 4.8 | Carbon steel | 0.55 | 0.05 | 0.06 |
| 8.8 | Carbon Steel (+ Bn, Mn or Cr) quenched and tempered | 0.4 | 0.035 | 0.035 |
| 8.8 | Carbon Steel quenched and tempered | 0.55 | 0.035 | 0.035 |
| 10.9* | Carbon Steel (+ Bn, Mn or Cr) quenched and tempered | 0.35 | 0.035 | 0.035 |
| 10.9 | Carbon Steel quenched and tempered | 0.55 | 0.035 | 0.035 |
| 10.9 | Carbon Steel (+ Bn, Mn or Cr) quenched and tempered | 0.55 | 0.035 | 0.035 |
| 10.9 | Alloyed steel quenched and tempered | 0.55 | 0.035 | 0.035 |
| 12.9 | Alloyed steel quenched and tempered | 0.5 | 0.035 | 0.035 |