AISI 1040 Composition overview Compositional summary Fe99 / Mn0.6-0.9 / C0.37-0.44 (impurities: S<0.05, P<0.04) Material family Metal (ferrous) Base material Fe (Iron) AISI 1040 Composition Detail C (carbon) 0.37 – 0.44 % Fe (iron) 98.6 – 99 % Mn (manganese) 0.6 – 0.9 % P (phosphorus) 0 – 0.04 % S (sulfur) 0 – 0.05 … Continue reading AISI 1040 Carbon Steel Chemical Composition