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ALLVAR (College Station, TX) was founded in 2014 and manufactures revolutionary metal alloys. These alloys’ unique negative thermal expansion helps compensate and eliminate the detrimental effects thermal expansion has in a variety of applications. Negative thermal expansion alloys can be used to athermalize optic designs, reduce thermal stress in assemblies, maintain a constant force load, and maintain thermal stability.
Currently, we are able to offer our Negative Expansion Alloys in Bar (up to 2.25” round) and tube (up to 3.00” OD) depending on wall thickness. We also offer thermal compensating washers and spacers to maintain constant pre-loads to control the margin of safety of bolted joints. These negative thermal expansion washers and spacers are available as Type B washers and in custom sizes.