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Coefficient of thermal expansion. The coefficient of thermal expansion describes how the size of an object changes with a change in temperature. Specifically, it measures the fractional change in size per degree change in temperature at a constant pressure. Several types of coefficients have been developed: volumetric, area, and linear.
Chapter 17 Material Expansion Coefficients. Linear Thermal Expansion Coefficients of Metals and Alloys. 17-2 Userâs Manual. Linear Thermal Expansion Coefficients of. Metals and Alloys. Table 17-1 provides the linear thermal expansion coefficients of the. most frequently used metals and allows. Table 17-1. Linear thermal expansison coefficients of metals and alloys. Coefficient of Expansion. Alloys ppm/Â°C ppm/Â°F.