| Carbon Steels and Alloy Steels |
| DIN 17210 |
| Chemical Composition, % |
| Steel Grade |
C |
Si Max |
Mn |
P Max |
S Max |
Cr |
Mo |
Ni |
| C 10 |
.07/.13 |
.15/.35 |
.30/.60 |
.045 |
.045 |
— |
— |
— |
| C 15 |
.12/.18 |
.15/.35 |
.30/.60 |
.045 |
.045 |
— |
— |
— |
| Ck 10 |
.07/.13 |
.15/.35 |
.30/.60 |
.035 |
.035 |
— |
— |
— |
| Ck 15 |
.12/.18 |
.15/.35 |
.30/.60 |
.035 |
.035 |
— |
— |
— |
| 15 Cr 3 |
.12/.18 |
.15/.40 |
.40/.60 |
.035 |
.035 |
.40/.70 |
— |
— |
| 16 MnCr 5 |
.14/.19 |
.15/.40 |
1.00/1.30 |
.035 |
.035 |
.80/1.10 |
— |
— |
| 20 MnCr 5 |
.17/.22 |
.15/.40 |
1.10/1.40 |
.035 |
.035 |
1.00/1.30 |
— |
— |
| 20 MoCr 4 |
.17/.22 |
.15/.40 |
.60/.90 |
.035 |
.035 |
.30/.50 |
.40/.50 |
— |
| 25 MoCr 4 |
.23/.29 |
.15/.40 |
.60/.90 |
.035 |
.035 |
.40/.60 |
.40/.50 |
— |
| 15 CrNi 6 |
.12/.17 |
.15/.40 |
.40/.60 |
.035 |
.035 |
1.40/1.70 |
— |
1.40/1.70 |
| 17 CrNiMo 6 |
.14/.19 |
.15/.40 |
.40/.60 |
.035 |
.035 |
1.50/1.80 |
.25/.35 |
1.40/1.70 |
* Alloy steels intended for direct quenching shall contain at least 0.02% by weight. of metallic (acid soluble) aluminum.
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