What is a good reference for the mechanical properties of materials at cryogenic temperatures?

Question

I want to research various the properties of various materials, namely tensile strength at cryogenic temperatures (~20K). I was wondering if a freely available database of material properties exists.

Answer 1

I know you probably tried googling this yourself, but is http://cryogenics.nist.gov/MPropsMAY/material%20properties.htm helpful? It is the first result for me from the query "cryogenic properties database."

EDIT: Also: http://cryogenics.nist.gov/Papers/Cryo_Materials.pdf