CL 40 Cast Iron Rod Material Cast Iron Material Grade CL 40 Overall Length 36 in Heat Treatable Yes Heat Treatment No Mechanical Finish Mill Outside Diameter 3 1/4 in Outside Diameter Tolerance +0.087/+0.163 in Yield Strength 42 500 psi Fabrication Cast Rockwell Hardness Not Applicable Brinell Hardness 197 Tensile Strength 40 000 psi Machinability Not Available Length Tolerance +/-3.000 in Includes Material Certificate Yes Standards ASTM A48 Shape Rod