1.1 This specifcation establishes the requirements for copper-tin alloy (phosphor bronze), copper-tin-lead lloy (leaded phosphor bronze). and copper tin-lead-zinc alloy (bear-ing bronze), plate, sheet, strip, and rolled bar. The phosphor bronzes commonly are used for deep draw ing into bellows and stamping and forming into spring devices and into terminals and connectors for electrical apparatus because they combine high strength with high elongation. The leaded phosphor bronzes are used where strength, corrosion resistance, and machinbility are required. The bearing bronze is used in bushings. bearings, and load-bearing thrust washers. The following alloys are covered:
