# coefficient of thermal expansion

Coefficient of thermal expansion is defined as the change in unit length per degree of temperature change. Linear thermal expansion coefficients of metals including aluminum, steel, bronze, iron, brass, copper, gold, silver, invar, magnesium, nickel, titanium and zinc are given in the following thermal expansion coefficients chart. representing the length change per degree per unit length, e.g., in./in./°F or mm/mm/°C. dl = elongation (m, in) α = temperature expansion coefficient (m/mK, in/in o F) l o = initial length (m, in). It generally measures the fractional change in the size of the object with the change in the temperature keeping the pressure constant. 12, Thermal Expansion, IFI/Plenum, New York, 1975. The Coefficient of Thermal Expansion is the rate change in the size of an object (could be solid, liquid or in gaseous state) with the rate change in the temperature. The linear thermal expansion coefficient (CTE) is dependent on the material from which an object is made. These linear thermal expansion coefficients are room temperature values of metals. 10-6 1/ºC), the quadratic term of the equation (8) can be neglected. The coefficient of thermal expansion or CLTE, Coefficient of Linear Thermal Expansion. CRC Press. Generally, linear thermal expansion is most applicable to solids. Thermal Expansion - Axial Force Calculator; Linear expansion due to change in temperature can be expressed as. The coefficient of thermal expansion is defined as the change in length or volume of a material for a unit change in temperature. The coefficient of linear thermal expansion (CLTE) of any material is the change of a material's dimension per unit change in temperature. The CTE employs reciprocal temperature units (K-1, °F-1, °C-1, etc.) dt = temperature difference (o C, o F) The strain - or deformation - for an unrestricted expansion can be expressed as The overall coefficient is the linear thermal expansion (in.) Boca Raton, Florida, 2003; Section 12, Properties of Solids; Thermal and Physical Properties of Pure Metals Touloukian, Y. S., Thermophysical Properties of Matter, Vol. dl = α l o dt (1). CR2. The CTE data is calculated by the change in length divided by the quantity of the length at room temperature, multiplied by the change of temperature. Assuming that the initial area is equal with the square of the initial length: \[A_0 = L_{0}^2 \tag{9}\] equation (8) becomes (6). where . The same principle applies to areal thermal expansions. per degree Fahrenheit or Celsius. - special thanks to reader Eric, P.E. Coefficients of Linear Thermal Expansion - Linear temperature expansion coefficients for aluminum, copper, glass, iron and other common materials; Linear Thermal Expansion - Linear temperature expansion - online calculator; Pipes and Tubes - Temperature Expansion - Pipes expands when heated and contracts when cooled and the expansion can be expressed with the expansion formula; … The linear expansion of a heated solid (or liquid) is measured by .