A286: An Economic Alternative to Inconel 718

Q: I need a 12 point bolt for a vacuum application with low off-gassing, min yield of 120 ksi, low magnetic permeability and minimum operating temps of 400C / 750F. Is Inconel 718 a good choice?

A: An Inconel 718 bolt will certainly work. The only other material you may want to consider would be an A286 in the cold worked version which will get you a min Tensile of 160ksi and a min yield of 120ksi. A286 bolts are readily available in a Socket Head Cap Screw design (if lead time is important) but if you need a 12 Point it could be made that way.  Same is true for Inconel 718.

For more information on A286 see the link: https://www.extreme-bolt.com/a-286-fasteners-flanges.html

 

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