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20MnB5

1.5530
alloy_steelboron
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Low-carbon manganese-boron steel for case hardening or through-hardening. Boron (0.0008-0.005%) provides cost-effective hardenability without expensive Cr/Mo/Ni. Lower C than 22MnB5 — better weldability and formability before hardening. Used for chains, fasteners, agricultural implements, and structural parts that are induction-hardened or carburized.

International equivalents

FlagStandardCountryGradeNumberMatch
🇪🇺ENEurope20MnB5 / 1.55301.5530100%

Sources: EN 10083-3

Chemical composition comparison (wt%)

Side-by-side: 20MnB5 (EN 10083-3) vs 20MnB5 / 1.5530 (EN) (EN 10083-3)

Element20MnB5 (EN 10083-3)20MnB5 / 1.5530 (EN)Overlap
C—0.17–0.23%—
Si—0–0.4%—

Mechanical properties

Compatibility verdict

20MnB5 and 20MnB5 / 1.5530: 100% composition match

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