Elgiloy Creep curves

[kevlar49]

I am having trouble finding creep curves for Elgiloy. Does anyone know a good resource?

 

[EdStainless]

Contact ELP.
I have fatigue curves but no creep.
You do know that this alloy is not to be used above 850F.
I am not sure that creep would ever be an issue.

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P.E. Metallurgy, Plymouth Tube

 

this alloy is not to be used above 850F.

I've never encountered this alloy, but I am curious - why not? Elgiloy contains lots of high-temperature ingredients.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

Ring up the manufacturer.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

 

[EdStainless]

This is a precipitation hardened material and at temps over about 900F you will start to get coarsening of the precipitates which will significantly degrade the properties. This will happen quickly at 1000F.
Even though this alloy sort of resembles MP-35N they are not similar.

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P.E. Metallurgy, Plymouth Tube

 

[MagBen]

This alloy can be offered different conditions. We make some bar stock, mainly in annealed condition. We also make wire and strip products in cold worked condition. Wire products can also be aged.
Aged wire will be stronger than cold worked condition, while annealed product will have much lower strengths. under what condition are you looking for creep curves?

 

[kevlar49]

Hi MagBen,
Our material is in the cold worked condition. It operates in the 600–1000 °F range.

 

[EdStainless]

but if you operate up to 1000F aren't you aging it in service?
But even if it doesn't you may be getting some stress relief, not to be confused with creep.
I really doubt that you are getting any true creep at 1000F.

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P.E. Metallurgy, Plymouth Tube

 

[Metalero]

I found An experimental one under the trademark. Maybe if you use standard numbering systems (AMS 5833; AMS 5834; ASTM F-1058; AMS 5875; AMS 5876; UNS R30003; NOL-WS 13822; Phynox) could find more.

Source

 

[EdStainless]

I am not sure that I would call the stress relaxation of a heavily stressed spring 'creep', certainly not in the the traditional definition. Yes, with springs there is some stress relaxation, when you take a strong highly stresses starting material and then severely deform it there are a lot of competing strains. The clock spring people that I worked with were more concerned about what happened over 100 years than in the first year.

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P.E. Metallurgy, Plymouth Tube

 

[MagBen]

This is more of schematic curve for a student modeling study. It is a long-term stress relaxation (so-called creep strain) vs loads at room temperature, no time (years) is given.
Traditional creep will specify temperature, load, then test plastic strain in specific time, or test life time at a specific strain (say 0.2%), similar to stress rupture where the elongation is calculated manually (creep is calculated with an electronic equipment).
We do a lot for Waspaloy, did not see any for Elgiloy. If you could place an order, and ask for creep, we can do it routinely.