C45 is a medium carbon steel for e.g. mechanical engineering and automotive components.
Variant SB8673 / SB-C45 is a variant with a narrowed chemical composition in order to reach a high hardenability and it is fine grain treated with Al
Variant SB1672 is a standard variant of C45 with medium Carbon for all purpose use
Variant SB1671 is a C45 with slightly lower alloy content and with an increased Sulphur content
Variant 5081 is a M-treated variant wich is offered under the name Imatra 4M
Variant 5155 is similar to 5081 but is a non M-steel with lower Sulphur content
Variant 047A is an ingot cast variant. High hardness and high strength can be achieved after hardening thanks to the relatively high carbon content. The steel is suitable for various type of applications where high strength is needed.
The basis for the concept is that non-metallic inclusions are modified and controlled with calcium treatment in a way to minimize tool wear and to maximize chip control in machining operations.
Our M-Steel treatment can be applied to any steel grade.
For further reading about our M-steel concept see our home page.
For additional Heat Treatment Data, please visit the Heat Treatment Guide.
C43, C44, C45R - 1.1201, C45E - 1.1191, Ck45, St70-2, SAE 1045, 080A42, SS 1672, XC 48, C 45, S 45 C, GOST 45, AISI/SAE/ASTM 1045, 1.0503