Delta ferrite limit in 316L
Delta ferrite limit in 316L
(OP)
Does anyone know if any international standards specify delta ferrite limit in their material spec?
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Delta ferrite limit in 316L
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RE: Delta ferrite limit in 316L
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Plymouth Tube
RE: Delta ferrite limit in 316L
In terms of NDT, higher level of Ferrite could cause some difficulties in terms of Eddy current testing MPI by encircling coils ( similr to Metal positive inspection).
Edstainless is right but his sentence doens't mean Ferrite is every time "dangerous". There are a lot of specifications imposes a limit of Ferrite but the main important thing remains in following question: is this limit an useful and mandatory requiremnt or is according to a tradition handed down from year to year in the stainless steels story ?
If you inform us what is the final use,we would give ,about % Ferrite, the right answer.
RE: Delta ferrite limit in 316L
And there are two different issues.
One is the calculated dF amount at equilibrium.
The second is the actual amount of dF in the material. Even alloys with high calculated dF can be annealed thoroughly and result in undetectable amounts of dF in the final product.
One other application that requires low residual ferrite is exposure to acids (such as orange juice).
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Plymouth Tube
RE: Delta ferrite limit in 316L
RE: Delta ferrite limit in 316L
RE: Delta ferrite limit in 316L
The measurable amount in annealed sheet is so low that it is undetectable. The same goes for properly annealed welded tubing.
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Plymouth Tube