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4317/X4317/18CrNiMo7- 6 case hardening steel, forged steel bar, DIA 80-1200mm
TYPICAL APPLICATIONS: Heavy-duty arbors, bushings, wear pins, bearings, sprockets, gears and shafts etc. Or can be used for high tensile applications uncarburised but through hardened and tempered.
Equivalent grades of steel 18CrNiMo7-6 (1.6587)
| EU EN | Germany DIN,WNr | France AFNOR | England BS | Italy UNI | China GB | Finland SFS | Inter ISO | ||||||||
| 18CrNiMo7-6 |
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Chemical Composition (%):
| C | Si | Mn | Ni | P | S | Cr | Mo |
| 0.15 - 0.21 | max 0.4 | 0.5 - 0.9 | 1.4 - 1.7 | max 0.025 | max 0.035 | 1.5 - 1.8 | 0.25 - 0.35 |
| Treatment | Condition | Temperature cycle | Cooling/quenching |
|---|---|---|---|
| Hot forging | +U | 800-1200°C | In air |
| Normalizing | +N | 860-890°C | In air |
| Carburizing | +C | 850-930°C Carbon potential see diagram | |
| Hardening | +QT | 840-870°C | In oil |
| Hardening | +QT | 780-830°C Hardening of as-carburized components | In oil |
