Asked by: Adonina Overmohle
home and garden indoor environmental quality

Does plastic expand more than metal?

Last Updated: 18th April, 2021

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If you're simply asking about the magnitude of thermalexpansion, then plastics typically have a largercoefficient of thermal expansion compared to metals.So, subjected to the same change in temperature, a plasticwill generally expand more (or contract more)than a metal. However, one is plastic and oneis metal.

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Herein, does metal expand more than glass?

You really cannot generalize between metal andglass. Overall glass has a smaller temperatureexpansion coefficient than most, and I repeat mostmetals. There are exceptions, for instance beryllium has asmaller expansion coefficient than doesglass.

One may also ask, does metal expand in cold? This means that each atom will take up more space due toits movement so the material will expand. When it iscold the kinetic energy decreases, so the atoms take up lessspace and the material contracts. Some metals expand morethan others due to differences in the forces between the atoms /molecules.

Just so, does aluminum expand more than steel?

(Steel has the same value as iron.) Thecoefficient for aluminum is 2.4, twice that of iron orsteel. This means that an equal temperature change willproduce twice as much change in the length of a bar ofaluminum as for a bar of iron. Lead is among the mostexpansive solid materials, with a coefficient equal to3.0.

Does a hole in metal get bigger when heated?

Metals expand when you heat them, so thecircle should expand. There's no real difference between thecircle and a hole (of the same size) cut out of it. Thecircle is, in effect, the circumference of the hole you putinto it. So the hole will get larger.

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