ASTM-B103 Standard Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar

Show Complete Document History

Document Center Inc. is an authorized dealer of ASTM standards.
The following bibliographic material is provided to assist you with your purchasing decision:

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



Want this as a site license?


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:

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

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

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; ICS Number Code 77.150.30 (Copper products)

To find similar documents by ASTM Volume:

02.01 (Copper and Copper Alloys)

To find similar documents by classification:

77.150.30 (Copper products)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.


Customers who bought this document also bought:

Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

Standard Test Methods for Rockwell Hardness of Metallic Materials

Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip

Document Number


Revision Level




Modification Type

Editorially changed

Publication Date

Oct. 11, 2023

Document Type


Page Count

6 pages

Committee Number