Washington Alloy 450 HT is designed for metal-to-metal abrasion involving impact such as rolling or sliding parts in earth moving equipment where lubrication is not possible. The weld deposits of 450 HT are martensitic in structure. Common uses would include printing and paper mill rolls, power shovel tumblers/ idlers, mine car wheels, brake drums, tractor rollers, Undercarriage Parts, Rollers, and Hook Rolls, etc.