Cast Iron 65-45-12 Dura-bar is a ductile iron grade offering high wear resistance, strength, durability, ductility, with excellent consistency, impact resistance, machinability, and finish. Tensile and Yield Strength are comparably strong to 1040 steel in the "as-rolled" condition.
65-45-12 Dura-Bar is manufactured through the Continuous Cast process, which is actually closer to extrusion than casting. However, this process causes all of the impurities in the molten iron to float to the top of the crucible, away from the metal being used to create the bar. This removes porosity and other impurities common to other cast iron grades.
65-45-12 can be oil quench hardened from 1600 F (885 C) to a minimum hardness of Rockwell C 50 on the outside of the bar. The inside diameter hardness will be less than Rockwell C 50.
It is typically used in the automotive and power industries for gears, rotors, pistons, valves, rollers, bushings, chucks, flywheels, pile drivers, rams pulleys, housings, and motorcycle disc brakes.