Tool Steel Rod, Material Tool Steel, Material Grade A2, Overall Length 6 ft, Heat Treatable Heat Treatable, Heat Treatment Air-Hardened, Mechanical Finish Mill, Outside Diameter 3 1/4 in, Outside Diameter Tolerance +0.01 in/+0.067 in, Yield Strength 55,000 psi, Fabrication Hot Rolled, Rockwell Hardness 60 HRC, Brinell Hardness 201 BHN, Tensile Strength Not Rated, Machinability 42 Percent, Length Tolerance +/-6 in, Includes Material Certificate Material Certificate with Lot Number