Beryllium copper's main characteristics
zhenzhongwang
Beryllium copper's main characteristics as a current carrying spring:
High strength
Beryllium copper can attain a high tensile strength, to a maximum of
1480 MPa and therefore can endure very high bending stresses as a
spring material.
High electrical conductivity
The electrical conductivity of Beryllium copper is 20% to 50% lACS,
depending on chemical composition and heat treatment applied, Beryllium
copper is the best material for high current density springs because of
the low heat generation resulting from this high electrical
conductivity.
High fatigue strength
Beryllium copper is known to have high fatigue strength because it
shows an excellent resistance to fatigue under reverse bending and it
continues to have a long life and high reliability.
High elasticity
Beryllium copper has an extremely high tensile strength to Young's
modulus ratio. This contributes to the fabrication of a compact spring
with good response to the load applied.
Elevated temperature properties
Beryllium copper is a precipitation hardening alloy with excellent
properties at elevated temperatures and can be used in a wide range of
temperatures
Good formability
Beryllium copper can be formed into complicated shapes in a solution
annealed state. High spring properties such as the highest mechanical
properties, good electrical conductivity and heat resistance will be
obtained by proper heat treatment after forming.
Corrosion resistance
Beryllium copper has good corrosion resistance nearly equal to nickel
silver and is not susceptible to hydrogen embrittlement.