Our Iron Ore processing also yields Steel Billets - another one of our finest products. Our billets are tailored to withstand additional processing with ease to yield the next intermediate or final product. Specification : Descriptions BS 4449 Grade 460 : C: 0.18% to 0.23% Si: 0.16% to 0.30% Mn: 0.85% to 1.25% ASTM A 615 Grade 40 : C: 0.22% to 0.31% Si: 0.15% to 0.30% Mn: 0.75% to 1.10% ASTM A 615 Grade 60 : C: 0.32% to 0.38% Si: 0.16% to 0.30% Mn: 1.00% to 1.40%