15NiCrMo13
1.6657Heavy-duty NiCrMo case hardening steel — Ni 3.0-3.5% for maximum core toughness and deep hardenability. For the largest case-hardened parts: heavy truck ring gears, mill pinions, crane slewing gears, and large marine gearboxes up to 500mm ruling section. Surface HRC 60-63 with extremely tough core. More Ni than 17CrNiMo6 = even deeper hardenability.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇪🇺 | EN | Europe | 15NiCrMo13 / 1.6657 | 1.6657 | 100% |
Sources: EN 10084
Mechanical properties — Pro
Case Hardened
| Property | Value | Unit |
|---|---|---|
| Hardness HRC |
QT Core
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elastic Modulus | ||
| Density |
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50CrV4
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51CrMoV4
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20MnCr5
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