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40Cr2

1.7065
alloy_steelquenched_tempered
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Chromium Q&T steel with higher Cr (1.3-1.6%) than 41Cr4 (0.9-1.2%) — deeper hardenability for larger ruling sections. Used for heavy shafts, large bolts, and machine components up to ~60mm ruling section where 41Cr4 would not through-harden. Also offers slightly better wear resistance and corrosion resistance than lower-Cr grades.

International equivalents

FlagStandardCountryGradeNumberMatch
🇪🇺ENEurope40Cr2 / 1.70651.7065100%

Sources: EN 10083-3

Chemical composition comparison (wt%)

Side-by-side: 40Cr2 (EN 10083-3) vs 40Cr2 / 1.7065 (EN) (EN 10083-3)

Element40Cr2 (EN 10083-3)40Cr2 / 1.7065 (EN)Overlap
C—0.35–0.42%—
Si—0–0.4%—

Mechanical properties

Compatibility verdict

40Cr2 and 40Cr2 / 1.7065: 100% composition match

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