Abstract
The present work was undertaken with the purpose of finding the more excellent alloys than Beryllium-Bronze containing 2-3% of beryllium. In this paper, the experimental results on Cu-Ni-Be alloys are dealt with. Among the alloys in the ranges of contents of 2-10% Ni and 0·2-2% Be, the alloy containing 2% Ni and 0·5% Be was found to have a very high tensile strength and electric conductivity when suitably heat-treatmented. In order to improve the propertics of this alloy, the effects of the addition of iron or chromium were investigated, and final'y, a very excellent alloy "Berychrome No. 1" was obtained, which standard composition is 2% Ni, 0·5% Be, 05% Cr, other elements less than 0·5%, and the remainder Cu. The mechanical properties of this alloy are shown in the following table.
Mechanical Properties of "Beryehrome No. 1."
This alloy has a slightly low tensile strength and hardnees than those of Beryllium-Bronze, but the elongation and electric conductivity are higher than those of the father.
