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30CrMoV9

1.7707
alloy_steelnitriding
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THE Cr-Mo-V nitriding steel — Cr 2.3-2.7% forms hard CrN nitrided case (800 HV surface). V addition for secondary hardening. Core QT to UTS 1080-1270 MPa before nitriding at 570-580°C. Used for piston rods, valve stems, cylinder liners, turbine parts, and any component needing extreme surface hardness + fatigue resistance without distortion (low nitriding temp).

International equivalents

FlagStandardCountryGradeNumberMatch
🇪🇺ENEurope30CrMoV9 / 1.77071.7707100%

Sources: EN 10085

Chemical composition comparison (wt%)

Side-by-side: 30CrMoV9 (EN 10085) vs 30CrMoV9 / 1.7707 (EN) (EN 10085)

Element30CrMoV9 (EN 10085)30CrMoV9 / 1.7707 (EN)Overlap
C—0.26–0.34%—
Si—0–0.4%—

Mechanical properties

Compatibility verdict

30CrMoV9 and 30CrMoV9 / 1.7707: 100% composition match

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