Material Notes:
Fatigue-Proof® has the high strength properties usually associated only with heat treated steels. It also has excellent machining characteristics, resistance to fatigue and corresponds to AISI Grade 1144. From this special quality hot roll grade Fatigue-Proof® is made by various combinations of mechanical working and thermal treatment wear, and it minimizes distortion. Fatigue-Proof® is produced from a high manganese, resulfurized, silicon killed steel.Information provided by Niagra LaSalle Corporation