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🇺🇸 USA equivalent of

C451.0503

AISI 1045G10450REF

Standard: AISI · Source: ASTM A29

Very close, minor Mn difference

Other international equivalents

CountryStandardGradeMatch
🇪🇺EuropeENC45100%
🇯🇵JapanJISS45C98%
🇬🇧United KingdomBS080M46 / EN896%
🇨🇳ChinaGB4595%