Products: ALLVAR Alloy 30 Round bar, Tube, and Custom Components

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Round Bar and Tube Sizing

Negative CTE Round bar and Tube shown with an image of three tubes and bars in a stylized format.

ALLVAR is provided in round bar and tube to the nearest size needed for your project. ALLVAR Round bar and Tube compensate for the natural expansion and contraction of other materials. These materials were made to make athermalization easy.

Table Header Table Header Header
Round Bar
Tube
Max Diameter
2.25″
3.00″*
Minimum Order Length
3.00″
3.00″

*Tube maximum diameter is dependent on the wall thickness needed.

Custom Components

Want to incorporate ALLVAR Alloys into your design, but not sure how. ALLVAR can help. Our engineers are able to assist during the design stage to successfully create ALLVAR Alloy components to athermalize your design. We can even deliver machined parts per your design.

ALLVAR provides custom-machined components for the following industries:

  • Energy
  • Aerospace
  • Automotive
  • Medical
  • Defense
  • Physics Laboratories
  • Optics
  • and Others
A zoomed in ALLVAR Alloy custom component is shown to show that negative thermal expansion materials are available for order. The words "custom components" are listed under the image.

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Lead Time and Pricing

Ready to get your hands on negative thermal expansion ALLVAR Alloy 30? We’ve got you covered. 

ALLVAR Alloy 30 is available to order in round bar, tube, and custom components. These items are custom made to order, so please inquire as soon as possible to discuss availability, lead time, and pricing.

ALLVAR Alloy 30 Specifications

Property Units ALLVAR Alloy Invar 304 Stainless Steel 6061 Aluminum Titanium 64
Property
Units
ALLVAR Alloy 30
INVAR
304 Stainless Steel
6061 Aluminum
Titanium 6Al4V
CTE Range @20°C
(ppm/°C)
-30
1.6 to 6
17.3
23.6
9
Max Operating Temperature
(°C)
100
200
870
120
540
Yield Stress
(MPa)
405
276
215
55
828
UTS
(MPa)
800
448
505
124
895
Elastic Modulus
(GPa)
75
141
193
68.9
113.8
Density
(g/cc)
5.08
8.1
8.0
2.7
4.42
Thermal Conductivity
(W/m·K)
8.88
10.15
16.2
180
6.6

Where can I learn more about your alloys?

You can start by visiting our FAQ page and our Resources Page for in-depth articles on various applications, learning videos, and articles about ALLVAR Alloys. We have coined this portion of the site ALLVAR University because we aim to help individuals learn how to use and design with these innovative Alloys 

For application-specific information, please see the dropdown options under technologies. In this area, you can learn the basics of ALLVAR Alloys spacers for optics, ultra-stable struts, and constant force load washers. Links to additional reading and videos is given for each application.

You can also find more information on ALLVAR Alloy 30’s matweb.com page or read published SPIE proceedings on SPIE’s Digital Library.

You can also contact us for more information.

Request a quote: ALLVAR Alloy Round bar, Tube, and Custom Components

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