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Boron-alloyed case-hardening and heat-treatable steel

Boron-alloyed case-hardening steel

Steel grade designation Standard designation Material no.
HLB 8 8MnCrB3 1.7135
HLB 17 modified 17MnB3 1.5506

Boron-alloyed heat-treatable steel (Manganese-boron steel)
DIN EN 10083

Steel grade designation Standard designation Material no.
HLB 20 modified 20MnB5 1.5530
HLB 22 22MnB5 1.5528
HLB 27 27MnCrB5-2 1.7182
HLB 30 modified 30MnB5 1.5531
HLB 37 37MnB4 1.5524
HLB 37 modified 36MnB4 / 38MnB5 1.5537 / 1.5532
HLB 42 40MnB4 1.5527
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