... service 30CrMnSiNi2A Alloy steel C 0.27~0.34 Si 0.90~1.20 Mn 1.00~1.30 S ≤0.020 ... .40~1.80We are specialized in heat-resisting super alloy, anticorrosion alloy, precision alloy, flat steel, square steel, die steel, spring steel, carbon ... tool steel, stainless steel, alloy steel, high speed steel, carbon structural steel, hot-rolled bar, hot-rolled wire rod, forged steel ...