The mechanical properties

microstructure and electric performance as well as their fracture morphologies were investigated by SEM for beryllium bronze （QBe2） and chromium bronze （QCr0.5） and aluminum bronze （QAl9-4） after solid solution treatment. The strength and electric performance of the three heat treated alloys can be improved

in which QBe2 possesses the best elasticity and QCr0.5 has the best electric performance

and the performance of QAl9-4 is located between those of the oher alloys. Fracture morphology shows that QBe2

QCr0.5 and QAl9-4 are ductile fracture

near to brittle fracture and quasi-cleavage fracture

respectively. QBe2 can be substituted for QCr0.5 for elastic electrical components under the conditions of low elasticity and low electric resistance requirement

while QAl9-4 is not suitable for elastic electrical components.