ASTM B103/B103M-19,Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar.
ASTM B103/B103M-19 establishes the requirements for copper-tin alloy (phosphor bronze), copper-tin-lead alloy (leaded phosphor bronze), and copper-tin-lead-zinc alloy (bearing bronze), plate, sheet, strip, and rolled bar.
Chemical Composition
The materials shall conform to the chemical composition requirements specified in Table1 for the copper alloy UNS No. designation specified in the ordering information.
These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and purchaser, limits may be established and analysis required for unnamed elements.
Grain Size of Annealed Tempers
Other than O60 (soft) temper, as indicated in Table 2,annealed tempers are special, and the material shall conform to grain size requirements agreed upon between the manufacturer and purchaser as defined in Classification B601.
ASTM B103/B103M-19 pdf can be downloaded on www.freestandardsdownload.com

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