Thermal expansion of some bronzes

Abstract

The results obtained in the course of independent tests and investigations on the linear thermal expansion of four groups of bronzes designated as tin-zinc, leaded, aluminum, and silicon bronzes are given for different temperature ranges. Curves showing the typical expansion and contraction characteristics of these bronzes during heating and cooling are prcsented. Ternary diagrams are given to show the effect of composition on the coefficients of expansion of copper-tin-zinc and copper-tin-Iead alloys. In general, the coefficients of expansion of these copper-base alloys increase as the addition of tin, zinc, or lead is increased. For the range from 20° to 100° C, the average coefficients of expansion of the various bronzes were found to be between 16.8 X 10-6 and 19.0 X 10-6 /° C .