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ASTM B103/B103M-04

ASTM B103/B103M-04

Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar

2017-08-16 /Historical
Superseeded by:

1.1 This specification establishes 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. The phosphor bronzes commonly are used for deep drawing 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 machinability are required. The bearing bronze is used in bushings, bearings, and load-bearing thrust washers. The following alloys are covered:

SAE Specification CA 521 conforms to the requirements of UNS No. C52100.

Copper Alloy UNS No. Nominal Composition, %Previously Used Designation
CopperTin ZincLead
C51000955. . . . . .A1
C51100964. . . . . .A
C51180964. . .. . .. . .
C51900946. . . . . .
C5210092 8. . .. . .C
C52180928. . . . . . . . .
C524009010. . . . . .D
C53400945. . . 1B1

Note 1—All of the above alloys contain small amounts of phosphorus, used as a deoxidant in melting, and to enhance the mechanical properties.

1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

copper-tin alloy plate; copper-tin alloy rolled bar; copper-tin alloy sheet; copper-tin alloy strip; copper-tin-lead alloy plate; copper-tin-lead alloy rolled bar; copper-tin-lead alloy sheet; copper-tin-lead alloy strip; copper-tin-lead-zinc alloy plate; copper-tin-lead-zinc alloy rolled bar; copper-tin-lead-zinc alloy sheet; copper-tin-lead-zinc alloy strip
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