Alloy Steel Rod, Material Alloy Steel, Material Grade 4140, Overall Length 36 in, Heat Treatable Heat Treatable, Heat Treatment Annealed, Mechanical Finish Mill, Outside Diameter 1 1/2 in, Outside Diameter Tolerance 0 in/-0.005 in, Yield Strength Not Rated, Fabrication Cold Rolled, Rockwell Hardness Not Rated, Brinell Hardness 241 BHN, Machinability Not Rated, Tensile Strength Not Rated, Includes Material Certificate No Certificates Included, Standards AISI 4140, ASTM A108, ASTM A29, UNS G41400