Alloy Steel Rod, Material Alloy Steel, Material Grade 4340, Overall Length 4 ft, Heat Treatable Heat Treatable, Heat Treatment Annealed, Mechanical Finish Mill, Outside Diameter 3 1/2 in, Outside Diameter Tolerance +0.047 in, Yield Strength 68,000 psi, Fabrication Hot Rolled, Rockwell Hardness B95, Brinell Hardness 217 BHN, Machinability 50 Percent, Tensile Strength 108,000 psi, Includes Material Certificate Material Certificate with Lot Number, Standards AMS 6415, AMS 6484, ASTM A29, ASTM A322