Cast Iron Rod, Material Cast Iron, Material Grade CL 40, Overall Length 12 in, Heat Treatable Heat Treatable, Heat Treatment Tempered, Mechanical Finish Mill, Outside Diameter 4 1/2 in, Outside Diameter Tolerance +0.092 in/+0.188 in, Yield Strength Not Rated, Fabrication Cast, Rockwell Hardness 50 HRC, Brinell Hardness 197 BHN, Tensile Strength 40,000 psi, Machinability Not Available, Length Tolerance +/-1 in, Includes Material Certificate Material Certificate with Lot Number