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 Alloy 16™ is 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 16 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 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