Ferrite test in Austenitic Stainless Steel.
Ferrite test in Austenitic Stainless Steel.
(OP)
DEAR ALL,
Our normal practice for checking ferrite content in Austenitic s.s is before heat treatment.I want to inform you that we are doing Solution Annealing at 1040°C for Austenitic stainless steel(i.e.A403 WP304L,WP316L) pipe fittings.so can anyone guide me why we are performing this ferrite testing before heat treatment.
If we check the ferrite content after Heat treatment,can we achieve the ferrite content in between 3 to 10% or this value will fall below 3% ???? can you provide me any reference code to justify the same? I cannot find any comment in code for doing the ferrite content test specifically before or after heat treatment.
Our normal practice for checking ferrite content in Austenitic s.s is before heat treatment.I want to inform you that we are doing Solution Annealing at 1040°C for Austenitic stainless steel(i.e.A403 WP304L,WP316L) pipe fittings.so can anyone guide me why we are performing this ferrite testing before heat treatment.
If we check the ferrite content after Heat treatment,can we achieve the ferrite content in between 3 to 10% or this value will fall below 3% ???? can you provide me any reference code to justify the same? I cannot find any comment in code for doing the ferrite content test specifically before or after heat treatment.





RE: Ferrite test in Austenitic Stainless Steel.
Because your first sentence indicates your organization performs this as your normal practice.
Determination of ferrite content in austenitic stainless steels is typically based on customer specification requirements for end use.
RE: Ferrite test in Austenitic Stainless Steel.
Weather the parts will have a low ferrite after heat treatment will depend on the chemistry of material. In particular the Cr and nitrogen balance. How are you checking the ferrite?
Bob
RE: Ferrite test in Austenitic Stainless Steel.
How you are checking is a good question. Surface condition, probe tip diameter, and field strength all will be significant factors.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Ferrite test in Austenitic Stainless Steel.
My weapon of choice is the Fischer FerritScope.
RE: Ferrite test in Austenitic Stainless Steel.
Thomas Eun
RE: Ferrite test in Austenitic Stainless Steel.
sorry for replying too late.
For "metengr" - yes,we are the manufacturer of pipe fittings,in which the ferrite test is normally done for AUSTENITIC S.S.and our normal practice to check the same is before heat treatment.
FOR "bhollands" we are checking the ferrite content with using FISCHER FERRITSCOP.
Finally thank you ALL especially "Thomas Eun" for giving such aggod explanation.
RE: Ferrite test in Austenitic Stainless Steel.
sorry for replying too late.
For "metengr" - yes,we are the manufacturer of pipe fittings,in which the ferrite test is normally done for AUSTENITIC S.S.and our normal practice to check the same is before heat treatment.
FOR "bhollands" we are checking the ferrite content with using FISCHER FERRITSCOP.
Finally thank you ALL especially "Thomas Eun" for giving such a good explanation.