A2 Tool Steel Rod, Material Tool Steel, Material Grade A2, Overall Length 6 ft, Heat Treatable Yes, Heat Treatment Air Hardened, Mechanical Finish Mill, Outside Diameter 1/2 in, Outside Diameter Tolerance +.01/+.032, Yield Strength 55,000 psi, Fabrication Hot Rolled, Rockwell Hardness C60, Brinell Hardness 201 to 235, Tensile Strength Not Rated, Machinability 42 Percent, Length Tolerance +/-6.00 in, Includes Material Certificate Yes, Standards ASTM A681, DIN 1.2363, SAE J437, SAE J438, Shape Rod