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 |
|
