AL 200 and AL 201 alloys are wrought commercially pure nickel. They differ, as to composition, in maximum specified carbon levels (0.15 for AL 200 and 0.02 for AL 201). Strengths of both alloys in the annealed condition are similar to that of mild steel. The lower carbon AL 201 alloy has higher temperature servicability than AL 200 alloy. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-364. Producer or source: Allegheny Ludlum Corporation.