Replacement of Hastelloy C276
Replacement of Hastelloy C276
(OP)
Hi People
Can anybody help me? I currently use a mixture of 316L stainless and Hastelloy C276 in the manufacture of some magnet driven pumps. The Hastelloy is used because the application is as a thin can which sits between the inner magnet and the outer magnet for containment. It is used instead of 316L because it has:
A) very low iron content (so the magnets do not heat it up via eddy curents)
B) Good mechanical strength as the can is very thin walled.
C) Good chemical resistance which is important but only needs to be as good as if not better than 316L
The price of Hastelloy however is going through the roof and I would like to look at options to replace the Hastelloy C276, has any of you good people got any ideas?
Can anybody help me? I currently use a mixture of 316L stainless and Hastelloy C276 in the manufacture of some magnet driven pumps. The Hastelloy is used because the application is as a thin can which sits between the inner magnet and the outer magnet for containment. It is used instead of 316L because it has:
A) very low iron content (so the magnets do not heat it up via eddy curents)
B) Good mechanical strength as the can is very thin walled.
C) Good chemical resistance which is important but only needs to be as good as if not better than 316L
The price of Hastelloy however is going through the roof and I would like to look at options to replace the Hastelloy C276, has any of you good people got any ideas?





RE: Replacement of Hastelloy C276
One of the 6%Mo stainless grades would fall in between for corrosion resistance, and they would be stronger than C276. There are lower alloy choices as well.
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RE: Replacement of Hastelloy C276
Like I say earlier, im not looking for fantastic corrosion reistance, just enough to cover the corrosion properties of 316L stainless as the majority of the product is made from 316L. Diameter wise we are talking around 2 inch (50mm) to 4 inch (100mm) cans with a wall thickness of around 0.1 inch (2.5mm).
You suggested one of the 6%Mo stainless steels, can you give me an example and more importantly the iron content?
Thanks
RE: Replacement of Hastelloy C276
RE: Replacement of Hastelloy C276
RE: Replacement of Hastelloy C276
The only issue with using Ti (or Cu alloys) in these applications is that the lower modulus can lead to unacceptable levels of defection.
My earlier post has vanished. I'll try again.
A typical 6%Mo grade is AL-6XN. What really matters in electrical condutivity, since that is what relates to Eddy Currents. As I recall for C276 you are about 120-130, for AL-6XN or 904L you will be 95-100, and for 316 you will be 70-75. (and no, I don't remember the units off of the top of my head)
If you want to talk specific sizes contact me.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm