What is the coefficient of thermal expansion of 304 stainless?

Answer 1

304:

CTE, linear 20°C 16.9 µm/m-°C 0 to 100°C

CTE, linear 20°C 18.7 µm/m-°C to 649°C

and 316L:

CTE, linear 20°C 16 µm/m-°C 0 to 100°C

CTE, linear 20°C 19.9 µm/m-°C to 871°C

if you want better CTE in an oxygen free environment, try carbon fibre (-1 to +1 µm/m-°C, parallel measurement). Or 'till 450°C at normal atmosphere.

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