Bismuth is a chemical element with symbol Bi and atomic number 83. Bismuth, a pentavalent post-transition metal, chemically resembles arsenic and antimony. Elemental bismuth may occur naturally
B 4674 (OTTO) Bismuth sputtering target, diam. x thickness 25.4 mm x 1 mm, 99.9% - used to make free-machining steels and free-machining aluminium alloys for precision machining properties.