Fastener for cyrogenic application

Q: I need to attach an LNG cryogenic pump and need to make sure I use a material that can withstand temperatures of –120 °F as well as don’t embrittle when fluctuating back to room temperature. Any suggestions?

A:  Monel K500 is a common choice for  cyrogenic fasteners. It can handle temperatures as low as -200°F with virtually no change it is ductility or toughness – in fact at low temperatures K500 actually increases in tensile and yield strength. Monel K500 fasteners are also are virtually non-magnetic and spark resistant at cryogenic temperatures.

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