Optimum Spring manufactures extension, torsion and compression springs with Beryllium Copper - ASTM B 197 - Spring Wire Properties
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Beryllium Copper - ASTM B 197 - Spring Wire Properties

Copper-base alloys are important spring materials because of their good electrical properties combined with their excellent resistance to corrosion. Although these materials are more expensive than the high-carbon and the alloy steels, they nevertheless are frequently used in electrical components and in subzero temperatures. All copper-base alloys are drawn to the American wire gage (same as Brown & Sharpe gage) and are nonmagnetic.


convert to metric units
Beryllium Copper
ASTM B 197
Nominal Chemistry
Cu98.0-%
Be2.0-%
Minimum Tensile Strength
psi x 103
150-230
E - Modulus of Elasticity
psi x 106
18.5
Design Stress % Minimum Tensile 45
G - Modulus in Torsion
psi x 106
7.0
Maximum Operating Temperature
°F
400
Rockwell Hardness C35-42
Density
lb/in3
0.298
Shear Modulus
c GPa
11600 80.0
Method of Manufacture
Chief Uses
Special Properties
Cold drawn and may be mill hardened before fabrication. Good corrosion resistance and electrical conductivity. High physicals.
Equivalent or Common Trade Names BeCu
ASTM B194
Alloy 25
C172
QQ-C-533
UNS C17200
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