Tag: Alloy 330 screws for cyclic conditions

A286 Bolts and Alloy 330 Bolts for Cyclic High Temperatures

Q: I need some suggestions on bolting for an application that is running at 610 degree C in a thermal cycling environment (Room temperature to 610 deg C). Is A286 a good fit?
A: This will depend a bit on the loads you are dealing with, but one of the best materials to look at for high temperature cycling would be A286. A286 bolts offer high strength, as well as creep and oxidation resistance to about 700°C.  Another choice would be Alloy 330 bolts. Alloy 330 fasteners are known for their ability to withstand cyclic temperature environments and are usable to around 1100C but not nearly as strong as A-286 fasteners. These two options are some of the best choices for furnace applications.

Inconel Bolts & Alloy 330 Bolts for Cyclic High Temperature Conditions

Q: I need a material that can stay oxidation resistant at 2000F in a cyclic temperature environment. Any suggestions?
A: One of the best choices is Inconel 601, UNS N06601,which is highly resistant to oxidation up to 2200°F and can handle even severe thermal cycling. These Inconel bolts will offer good high temperature strength and retain ductility after long service exposure. Also an excellent choice would be an Alloy 330 bolt. They offer oxidation and carburization resistance to 2100F – just over your requirement. Alloy 330 bolts are also known for their ability to withstand cyclic conditions of temperature extremes from heating and cooling. Which fastener is better, Inconel or Alloy 330, will depend on your strength requirements at temperature.