beryllium copper
Beryllium Copper - S.A.E. CA 172


Beryllium Copper Alloy 172, the highest strength copper-base material, combines the strength of steel with such desirable properties of copper as good electrical coonductivity and high corrosion resistance. Unhardened Beryllium Copper can be severly formed and then heat-treated to a high strength level not possible through normal rolling practices. Typical applications are switches, coontacts, relays, springs, thermostats and fasteners.

Nominal Chemical Composition:
Copper 98.00%
Beryllium 1.90%
Cobalt 0.10%

Typical Mechanical Properties
SOFT HALF-HARD
Tensile Strength, psi 70,000
92,000
Yield strength, psi 32,000
82,000
Elongation, % in 2" 45
15
Rockwell Hardness, B Scale 60
92

Typical Physical Properties
SOFT HALF-HARD
Density, Lbs./Cu. In. 0.298
0.298
Melting Point, approx. °F 1800
1800
Electrical Conductivity, % IACS at 20°C (68°F) 22
22
Thermal Conductivity, btu at 20°C (68°F) 62
62
Average Coefficient of Thermal Expansion at 68 to 572°F 0.0000099
0.0000099

Government and Industry Specifications
SOFT HALF-HARD
A.M.S. 4530 4532
A.S.T.M. B194 B194
Federal QQ-C-533 QQ-C-533
S.A.E. CA172 CA172




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