COPPER ALLOY
DATA SHEET
C21000
Gilding Brass C21000 has a nominal composition of 95% copper and 5% zinc. This combination results in the same excellent resistance to corrosion and stress corrosion cracking that pure, unalloyed copper has, but with a slightly greater strength due to the small amount of zinc. The added strength is specifically achieved by solid solution strengthening from the zinc.
Hot Working and Cold Working: This alloy possesses good hot working properties as well as an excellent capacity for being cold worked. It lends itself readily to most methods of fabrication, including blanking, drawing, etching, forming, swaging, and stamping.
Joining: Joining by soldering and brazing is excellent. Good joints can be obtained by oxyacetylene and gas shielded arc welding. Rod, bar, and wire may be resistance flash butt welded.
Applications: As an alloy, C21000 is rugged enough for use in industrial and engineering applications, yet is still exceptionally malleable for extensive use as base metal for coins, costume jewelry, medallions and ornamental trim. It is also an excellent base for coating with vitreous enamels, lacquer, and gold plating.
Among this alloy's other noteworthy characteristics are its greater resistance to season cracking than the yellow brasses, and its durability when exposed to the rigors of outdoor services. These properties have greatly extended its use to general engineering purposes and to the manufacture of small arms ammunition components such as bullet jackets, primer caps, and firing pin support shells.
Alloy C21000 can be supplied as cold heading wire for use on products where its strength and moderate conductivity are required. Typical applications requiring these properties are fasteners, electrical equipment and connectors.
Applicable Specifications: When so specified, C21000 will be manufactured to the latest revision of ASTM Specification B134 (wire) and customer specifications.
Standard Forms Available: Rod, bar or wire. For other forms, please contact Ansonia Copper & Brass, Inc.
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ADS No. C21000 |
Rev. No. 4 |
Rev. Date 8/2/99 |
C21000 |
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P. O. Box 109 - Ansonia,
Connecticut 06401 |
725 Bank St. - Waterbury,
Connecticut 06708 |
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Tel.: 1-800-521-1703 FAX 203-735-3787 |
Tel.: 1-800-243-3204 FAX 203-756-1330 |
PROPERTIES OF C21000
Nominal Composition: 95% Copper
5% Zinc
Physical Properties:
Melting Point (Liquidus): 1065°C (1950°F)
(Solidus): 1050°C (1920°F)
Density: 0.320
Lbs./In.3
Coefficient of Linear Thermal Expansion per °F: 1 x 10-5 (68-572°F)
Electrical Conductivity at 68°F (volumetric): 56% IACS (in the annealed condition; lower in hard temper)
Thermal Conductivity Btu/ft.2/ft./hr./°F at 68°F: 137
Modulus of Elasticity - Tension: 17,000 ksi
Modulus of Rigidity: 6,400 ksi
Fabrication
Properties:
Hot Working Temperature: 750-875°C (1400-1600°F)
Annealing Temperature: 425-800°C (800-1450°F)
Approximate Relative Machinability: 20 (free cutting brass arbitrarily rated at 100.)
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Mechanical Properties: |
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Wire |
Tensile Strength (psi) |
Yield Strength (0.5% Ext.) (psi) |
% Elongation (in 2") |
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Hard |
74,000 |
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2 |
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Soft |
40,000 |
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42 |
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ADS No. C21000 |
Rev. No. 4 |
Rev. Date 8/2/99 |
C21000 |
The
statements and data provided on this data sheet are to be considered only as a
general guide. Commercial variations in
material properties are expected, so values listed here are not intended to be
used for specifications. Please consult
the appropriate industry specifications where applicable. Ansonia Copper & Brass, Inc. also cannot
assume responsibility for performance of these products in service because we
do not control or supervise subsequent use of our products.