Strain Vs Temperature

Thermal expansion refers to a material’s natural increase in size with increasing temperature. While all other metals in the world expand with increasing temperature, ALLVAR Alloys are designed to shrink with increasing temperature.

This revolutionary property can compensate for the expansion or contraction of other materials in the world’s most demanding thermal stability applications.

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The pictures show a 12″ rod of ALLVAR Alloy vs. the same size Aluminum at room temperature, 100°C, and -196°C. At elevated temperatures, the ALLVAR alloy shrinks while aluminum expands. When cooled, the opposite occurs.

 

 

 

 

 

 

Property Units ALLVAR Alloy 16 Invar 304 Stainless Steel 6061 Aluminum Titanium 64
CTE Range @20°C (°C) -16 to -32 1.6 to 6 17.3 23.6 9
Max Operating Temperature (°C) 100 200 870 120 540
Yield Stress (MPa) 710 276 215 55 828
UTS (MPa) 750 448 505 124 895
Elastic Modulus (GPa) 70 141 193 68.9 113.8
Density (g/cc) 5.08 8.1 8.0 2.7 4.42
Thermal Conductivity ((W/m·K)) 6.2 – 8.7 10.15 16.2 180 6.6

Potential Applications… What can ALLVAR alloys do for you?

Infrared and Optics
Telescopes, Satellites, and Spacecraft
Extreme Environments
Energy and Petrochemical
Lasers
Industrial
UAV Optics
Liquid Natural Gas