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Name: Tbasnet
Status: student
Grade: 9-12
Country: Nepal
Date: Summer 2014

What is the name of substances that do not expand on heating?

Hi Tbasnet

In fact, there are no substances that (over a wide temperature range) do not expand at all. There are a few alloys that exhibit very LOW rates of thermal expansion, but they only exhibit this property over a relatively narrow temperature range. An example is the alloy "Invar".

I am unaware of a generic name for these alloys.

Regards, Bob Wilson

I do not know of any quasi-greek name ... I only know them as zero thermal expansion materials.

Wish I could help more, Burr Zimmerman

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