8 grades

Carbon Manganese Steel Billets

Carbon manganese steels add roughly 1.3 to 1.7% manganese to a plain carbon base. The extra manganese raises hardenability and strength without alloy additions, so they are used for forgings that are quenched and tempered.

Supplied as continuous cast billets and blooms, 100 × 100 to 250 × 250 mm and 200 mm round, in lengths up to 12 m. Send the grade, standard, section and length for a quotation. Chemistry is certified on the heat test certificate.

20Mn227Mn237Mn2EN15EN15AEN15BSAE 1541SAE 1541B

Carbon manganese grades

In IS 1570 the Mn2 in a name means about 1.5% manganese.

20Mn2 steel billets

About 0.20% C with about 1.5% Mn. Low carbon manganese steel for case hardened and forged parts.

27Mn2 steel billets

About 0.27% C with about 1.5% Mn. Medium-low carbon, quench and temper grade.

37Mn2 steel billets

About 0.37% C with about 1.5% Mn. Medium carbon manganese steel for shafts and axles.

EN15 steel billets

BS 970 manganese steel with higher hardenability than plain carbon grades.

EN15A steel billets

A variant of EN15. Order against the stated limits.

EN15B steel billets

A variant of EN15. Order against the stated limits.

SAE 1541 steel billets

About 0.36–0.44% C and 1.35–1.65% Mn. Used for forged shafts, axles and gears.

SAE 1541B steel billets

The boron-treated version of SAE 1541, for deeper hardening.

Other grade families

See also steel billet specifications and the billet size chart.