0.00000645in/in/deg F is the coefficient of expansion for steel. so if you had a 12" plate, that was heated up 30°f you would get "0.00000645 * 12 * 30 = 0.002322" (12" + 0.002322") would be the new length at the increased temperature.
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Steel will begin to expand when it reaches temperatures above 1000°F (538°C). The expansion rate of steel is approximately 0.00000645 in/in/°F (0.0000116 mm/mm/°C) per degree Fahrenheit (Celsius).
All metal expands and contracts as soon as there is a change in temperature. The amount various metals expand and contract varies with the metal type.
The temperature of steel is determined by the amount of vibration of its constituent atoms. Hotter atoms vibrate more. And when they vibrate more, they take up more space. Hence, the steel expands.
Steel is not an element it is a metallic alloy containing iron, carbon and other additives. At standard temperature and pressure it is a solid.
No, liquids do not always expand uniformly with temperature. Generally, liquids expand as they are heated, but the expansion may not be uniform due to factors such as the specific properties of the liquid and the conditions under which it is heated.
It will contract.
The amount a bearing will expand when heated depends on factors such as material composition and temperature. However, typically a bearing will expand around 0.0005 inches per inch of diameter for every 100°F increase in temperature.