ALLVAR Alloys are the only materials in the world that have a negative coefficient of thermal expansion. Our alloys are unrivaled in their capacity to athermalize a wide range of systems, leading to improved performance, reduced lead time, and reduced costs. Keep scrolling to learn more!
Athermalization of Optics using NTE Spacers
ALLVAR has a variety of commercially off-the-shelf (COTS) and custom NTE Spacers that help maintain alignment and improve performance of optics, including:
- Refractive Optics
- Head mounted systems
- Military & Aerospace optics
- Augmented and virtual reality (AR/VR) systems
- Free space optical systems
- Reconnaissance optics
Ultra Stable Struts for Precision Systems
Have a metering application? ALLVAR’s Ultra-Stable Struts can solve thermalization issues in:
- Telescopes and Reflective Systems
- Satellites
- Spacecraft
- Ultra-precision systems
Constant Force Load Washers
ALLVAR offers a wide range of washers that can counteract the force and dimensional changes experienced during extreme temperature cycling. Utilize these revolutionary washers to:
- Tackle CTE mismatch in extreme environments
- Increase reliability of components in cryogenic systems, scientific instruments, precision machinery, and energy industries
- Maintain constant force load in industrial seals and pre-loaded bolts
- Solve thermal mismatch in liquid natural gas transport
Custom Negative Thermal Expansion Products or Components
The negative thermal expansion of ALLVAR Alloy 30 can be machined into custom products or components best suited for your specific product or project. Not sure if ALLVAR is a good fit for your project? Please contact us. We would be happy to discuss negative thermal expansion Alloy 30’s applicibility for your application.
Negative Coefficient of Thermal Expansion Washers
Kit includes:
• 12 hours of design and engineering time from Allvar engineers
• Set of washers (quantity depends on size of washers and the application)
Washers available in #2, #4, #6, and #8 sizes. Custom washer and spacer sizes are available
Contact us
Type B Regular Plain Washers
- Nominal Washer Size: 2
- Washer Inside Diamter: 0.094″
- Washer Outside Diameter: 0.250″
- Thickness Range: 0.028″ – 0.036
- Washer Standards: ASME B18.22.1
- ASME B18.24 Part Number: AEW26X08R000GY0A1
- Item Number: AW30-0002
- Nominal Washer Size: 4
- Washer Inside Diamter: 0.125″
- Washer Outside Diameter: 0.375″
- Thickness Range: 0.036″ – 0.045″
- Washer Standards: ASME B18.22.1
- ASME B18.24 Part Number: AEW26X11R000GY0A1
- Item Number: AW30-0004
- Nominal Washer Size: 6
- Washer Inside Diamter: 0.156″
- Washer Outside Diameter: 0.438″
- Thickness Range: 0.036″ – 0.045″
- Washer Standards: ASME B18.22.1
- ASME B18.24 Part Number: AEW26X13R000GY0A1
- Item Number: AW30-0006
- Nominal Washer Size: 8
- Washer Inside Diamter: 0.188″
- Washer Outside Diameter: 0.500″
- Thickness Range: 0.036″ – 0.045″
- Washer Standards: ASME B18.22.1
- ASME B18.24 Part Number: AEW26X16R000GY0A1
- Item Number: AW30-0008