32CrMoV12-10
1.7765Premium CrMoV nitriding steel with highest Cr (3%) and Mo (1%) in the nitriding series — designed for maximum core strength after nitriding. Higher strength than 31CrMoV9 and 31CrMo12. AMS 6481 for aerospace. THE gun barrel material. Nitrided surface reaches 860+ HV while maintaining tough core at 415 HV. Used for gun barrels, high-performance gears, ball bearing races, crankshafts, and components requiring the ultimate combination of core strength + surface hardness.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AMS | USA | AMS 6481 | — | REF |
| 🇪🇺 | EN | Europe | 32CrMoV12-10 / 1.7765 | 1.7765 | 100% |
Sources: AMS 6481, SEL
Chemical composition comparison (wt%)
Side-by-side: 32CrMoV12-10 (SEL / AMS 6481) vs 32CrMoV12-10 / 1.7765 (EN) (SEL)
| Element | 32CrMoV12-10 (SEL / AMS 6481) | 32CrMoV12-10 / 1.7765 (EN) | Overlap |
|---|---|---|---|
| C | — | 0.3–0.35% | — |
| Si | — | 0–0.35% | — |
Mechanical properties
Compatibility verdict
32CrMoV12-10 and 32CrMoV12-10 / 1.7765: 100% composition match
Related materials
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