* SM45C,S45C,1045,1046,080M46,CK45,C45 Material comparison table (carbon steel for mechanical structures) 1. Chemical composition Code KS JIS AISI AISI BS DIN DIN Material Grade SM45C S45C 1045 1046 080M46 CK45 C45 C 0.42~0.48 0.42~0.48 0.43~0.50 0.43~0.50 0.42~0.50 0.42~0.50 0.42~0.50 Si 0.15~0.35 0.15~0.35 agreement agreement 0.10~0.40 0.15~0.35 0.15~0.35 Mn 0.60~0.90 0.60~0.90 0.60~0.90 0.70~..