Popular and commonly used steel for heat treatment & chemical treatment, and carburizing. Products made of this type of steel maintain high core ductility at high surface hardness. Suitable for machining. Weldable after heating. Suitable for cutting.
Parts exposed to high abrasive wear and working under medium stress: piston pins, levers, scroll wheels, sleeves, camshafts & other vehicle parts.
Chemical composition
| Element | C | Si | Mn | P | S | Cr | Cu |
| min | 0.14 | 0.15 | 1.00 | max | max | 0.80 | max |
| max | 0.19 | 0.40 | 1.30 | 0.025 | 0.035 | 1.10 | 0.40 |
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Equivalents
| Wr.Nr. | PN | EN | GOST | AISI |
| 1.7131 | 16HG | 16MnCr5 | ~18ХГ | 5115 |
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