1045 Carbon Steel Disc Material Carbon Steel Material Grade 1045 Overall Length 1 in Heat Treatable Yes Heat Treatment No Heat Treatment Mechanical Finish Mill Outside Diameter 2 in Outside Diameter Tolerance +0.000 in/-0.004 in Yield Strength 77 000 psi Fabrication Cold Finished Rockwell Hardness Not Rated Brinell Hardness 90 Tensile Strength 110 000 psi Machinability 64 Percent Length Tolerance +/-0.125 in Includes Material Certificate Yes Standards ASTM A108 ASTM A29