Category: Ask the Experts

I would like to use metal springs made of Tungsten or Tantalum in low temperature environment. Does anybody have any experience with such springs? More precisely, I would like to make compression springs by rolling tungsten or tantalum wire on a rod. I expect that, typically, the spring constant will …

I am interested in finding out more about cryogenic applications and what standards, specifications and test methods (ASTM, etc.) are required for qualification of pipe and tube couplings.

I am looking to find a test house that is capable of testing the static coefficient of friction under cryogenic conditions. We can be flexible on most of the test parameters, including the test coupon configuration, but we're looking for a test house that can provide the following test environment: …

I am an Air Resources Engineer with the California Air Resources Board (CARB). My senior management has asked me to investigate approximating pressure changes over time in cryogenic cylinders that contain LNG. So far, I have taken a stab at the problem, seeking to take a back-of-the-envelope approach (as directed …

I have a cryostat with closed cycle cryocooler attached. The case is aluminum with a G-10 spacer between the case and a stainless steel bellows that supports the cryocooler.

I am a newly retired experimental physicist. Is it feasible for an “amateur” to construct a liquid air plant? Do you have detailed descriptions of older (presumably simpler) liquid air plants, or references that might be of assistance?

I'm looking for data on the thermal contraction value for Aluminum 6061-T6. Can you guide me in the right direction?

Could you advise on me where to find some literature regarding the cryoforming of steel for pressure vessel applications?

I am a student from Chicago, and I need to calculate the pressure necessary for an adiabatic liquefaction of nitrogen.

Can anyone help me get a table (or diagram) of different thermal expansion coefficient for different cryogenic liquids (especially LN2, LO2 and LH2)?

Where can I find a small, low power cryocooler to use in a working prototype device? Please provide a list of suitable manufacturers.

We need super insulation for a cylindrical container of approximately 10 cm in diameter and 10 cm height to be kept at -40 ° Centigrade for less than 24 hours (outside=room temperature).

What is the power requirement to liquefy hydrogen gas?

I have been making bells for a few years out of Bell Bronze, 87% Copper. Would cryogenic freezing have any effect on the tone of a bell if I had it treated after casting? Your help would be appreciated.

I am interested in the thermal conductivity and other properties of low temperature superconductors. Specifically I am interested in materials like Niobium, Tantalum, Lead and Tin. Would you know of a publication that dealt with thermal properties in general and also gave specific data on these materials?

In the event of a disaster such as a flood, could boxes of paper records be freeze-dried? Could cryogenics help in the recovery efforts?

I have been searching for information regarding the training of cryogenic insulators and have not been able to find any information in North America.

I am looking for some help in material selection for the magnet wire (CDA101 oxygen-free copper, phosphor bronze, beryllium copper, others?) and insulation materials. Also, what testing is required to establish the RRR for any particular wire?

I have been searching [unsuccessfully] for data on both the elasticity and density figures for 316 st/steel at low temperatures.

I am looking for a Al-SS transition pieces that will allow welding between aluminum and stainless steel tubes. Do you know a supplier of these transitions?