Rod Stock General Purpose Alloy Steel Alloy Type 4140 Diameter 2 In Length 6 Ft Turned Ground And Polished Finish Temper Cold Finished/Heat Treated Diameter Tolerance +0.000/-0.0015 In Length Tolerance +/-6.000 In Typical Tensile Strength 125 000 PSI Typical Yield Strength 105 000 PSI Typical Hardness 321 Hardness Scale BHN Standards ASTM A108 ASTM A29 ASTM A193-B7 UNS# G41400 AISI 4140