Chemical Composition C(%)Si(%)Mn(%)Cr(%)Cu(%)Mo(%)P(%)S(%)0.7-0.800.17-0.370.7-0.80.50-0.600.25max0.3max0.035max0.035maxSize 20-200mm(0.8inch-8inch) Hardness SeriousSurfaceVolume HardnessStandard Hardness23-26HRC20-23HRCHigh Hardness43-45HRC40-42HRCImpact Value ≥15J/CM^2Strength of Extension ≥1200mpa/mm^2Length Tolerance +1m,-25mmDiameter Tolerance(mm) +0m,-1.5mm Production Process Raw material inspection--Blanking--Burr grinding--Furnace heating--Straightening-- Quenching--Tempering treatment--Inspection--PackageApplication Mines, Chemical industries, Quartz sand plant, Other rod millsPackage Steel wire