Flat Stock, General Purpose, Alloy Steel, Alloy Type 4140, Thickness 1/2 in, Width 1 in, Length 36 in, Unpolished Finish, Temper Cold Finished/Annealed, Thickness Tolerance +0.000/-0.007 in, Width Tolerance +0.000/-0.009 in, Length Tolerance +/-3.000 in, Typical Tensile Strength (PSI) -, Typical Yield Strength (PSI) -, Typical Hardness 241 Max, Hardness Scale BHN, AISI 4140, ASTM A108, ASTM A29, UNS G41400 Standards Package of 4.