| Symbol of class | % C | % Mn | % S | % P | % Si | % Cr | % Ni | % Mo | % V | % B | % W | % Al |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S 20 C | 0.18/0.23 | 0.30/0.60 | 0.035 max | 0.030 max | 0.15/0.35 | - | - | - | - | - | - | - |
| 525C | 0.22/0.28 | 0.30/0.60 | 0.035 max | 0.030 max | 0.15/0.35 | - | - | - | - | - | - | - |
| S 45 C | 0.42/0.48 | 0.60/0.90 | 0.035 max | 0.030 max | 0.15/0.35 | - | - | - | - | - | - | - |
| SCr420 | 0.18/0.23 | 0.60/0.85 | 0.030 max | 0.030 max | 0.15/0.35 | 0.90/1.20 | - | - | - | - | - | - |
| SCr440 | 0.38/0.43 | 0.60/0.85 | 0.030 max | 0.030 max | 0.15/0.35 | 0.90/1.20 | - | - | - | - | - | - |
| SCM420H | 0.17/0.23 | 0.55/0.90 | 0.030 max | 0.030 max | 0.15/0.35 | 0.85/1.25 | - | 0.15/0.35 | - | - | - | |
| SCM440H | 0.37/0.44 | 0.55/0.90 | 0.030 max | 0.030 max | 0.15/0.35 | 0.85/1.25 | - | 0.15/0.35 | - | - | - | - |
| SUP6 | 0.56/0.64 | 0.70/1.00 | 0.035 max | 0.035 max | 1.50/1.80 | - | - | - | - | - | - | - |
| SUP7 | 0.56/0.64 | 0.70/1.00 | 0.035 max | 0.035 max | 1.80/2.20 | - | - | - | - | - | - | - |
| SUP9 | 0.52/0.60 | 0.65/0.95 | 0.035 max | 0.035 max | 0.15/0.35 | 0.65/0.95 | - | - | - | - | - | - |
| SUP9A | 0.56/0.64 | 0.70/1.00 | 0.035 max | 0.035 max | 0.15/0.35 | 0.70/1.00 | - | - | - | - | - | - |
| SUP10 | 0.47/0.55 | 0.65/0.95 | 0.035 max | 0.035 max | 0.15/0.35 | 0.80/1.00 | - | - | 0.15/0.25 | - | - | - |
| SUP11A | 0.56/0.64 | 0.70/1.00 | 0.035 max | 0.035 max | 0.15/0.35 | 0.70/1.00 | - | - | - | 0.0005 min | - | - |
