Spring Material for Hot Environment?

[PJGD]

I would welcome suggestions for a spring material that can operate in a hot environment indefinitely. Specifically, a material which might be applicable in a location where one might otherwise use a helical compression spring. The environment involves immersion in a somewhat corrosive fluid over the temperature range of -30°C up to say 500°C. Any ideas?

Thanks
PJGD

 

[CoryPad]

Titanium alloys, stainless steels, or nickel alloys. If you are more specific with conditions, we can be more specific with recommendations.

 

[gunsmith]

There is a steel-wire with E-modulus independent from temperature called DYNAVAR (Ni-Fe-Cr-Co). The range goes from -400C to +400C with an Rm>1440 N/mm^2. I never used such a material, but is a registered name. Anyone dealing with technical wires or spring wires should be able to find out who is the manufacturer of this material.

Andreas

 

[mcguire]

Cold-worked austenitic stainless steel can be obtained widely as spring material in yield strengths easily up to 200,000 psi. It is simply a case of choosing the grade that is appropriate for the corrosivity of the projected environment.

 

[TVP]

I agree with CoryPad. Depending on the stresses, corrosive environment, etc. I would recommend Inconel X-750 (nickel-based superalloy) or Titanium alloy 3-8-6-4-4, also known as Beta-C. You can find more information on these two alloys at the following websites:

Inconel

http://www.specialmetals.com/publication/tech_bulletin_x750.pdf

Beta-C

http://www.allvac.com/allvac/pages/PDF/tech/TI-50938-644.pdf

http://www.rti-intl.com/

 

[PJGD]

Thank you to all respondants! I will investigate all of your leads.

The fluid in question is aqueous urea (32.5% urea by weight, ie, utectic), and the hot environment is diesel exhaust.

PJGD