G.E. ALLOY J-1570 is a cobalt-base alloy having good forgeability and superior fatigue strength at 1500 deg. F. It is an age-hardening alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Co-11. Producer or source: Metallurgical Products Department, GE.