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FAQs about ALLVAR

Yes.  ALLVAR alloys are titanium-based alloys. 

Currently, we provide:

  • Solid bar up to 2 1/2″ round
  • Tube up to 3″ OD, depending on the wall thickness
  • Rod as small as 1/8″ diameter
  • Constant force-load washers for fasteners in temperature variant environments

 Yes.  ALLVAR Alloys machine like titanium.

ALLVAR Alloys have similar magnetic properties to other titanium-based alloys, which are generally considered non-magnetic.

Not yet, but stay tuned!

Since ALLVAR Alloys are made of true metals, they behave like all other metals do in a vacuum. There is no moisture or other material component that would cause problems from outgassing.

 Yes.  We have successfully welded ALLVAR Alloys to Ti-6-4 and other ALLVAR pieces.

ALLVAR Alloy 30 operates from cryogenic temperatures to 100 °C.

The newer developed ALLVAR Alloy HT has a higher operating temperature of 250°C.

Let us know if you have an application that exists outside of this range, we are materials scientists at heart and would love the opportunity to develop a higher temperature NTE alloy.

No.  ALLVAR is anisotropic, meaning if the bar shrinks in length, it will grow in the radial direction.  The growth is consistent and runs about 2 ppm/°C more than the shrinkage in the length.  For example, if the ALLVAR bar has a negative 30 ppm/°C in the length, it will have a positive 32 ppm/°C in the radial.

ALLVAR Alloys are a titanium-based set of alloys and contain alloying elements that are comparable to titanium in regards to corrosion resistance.

We have never coated it ourselves, but we have been told it can be coated like titanium. 

We have never polished it. But it will polish like titanium, which, we have been told, is a bit gummy.

While we have not studied this directly, we have never observed a change in CTE characteristics or performance during normal the normal handling experienced in a machine shop environment.

No.  ALLVAR alloys do not absorb moisture from the surrounding environment.