Abstract
1. The ultimate strength of beryllium wire with a purity of 99.96–99.99% is lower than that of wire from commercial beryllium; it increases from 54 to 90 kgf/mm2 as the diameter of the wire is reduced from 1.3 to 0.19 mm. The strength of annealed wire is independent of the diameter. The ductility is high for wire of high purity beryllium. 2. Mechanical stresses and plastic deformation of wire at 77°K induce relatively small changes in the specific electrical resistivity, which decreases with decreasing purity of the wire.
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