Austenitic Stainlees steel - NACE Compliance
Austenitic Stainlees steel - NACE Compliance
(OP)
Hi All,
I have a question on interpretation of NACE MR0175 in regard to compliance of Austenitic Stainless Steel (e.g. 304 / 316).
Table A.6 in Part 3 indicates that this type of material is acceptable as long as the hardness is not greater than 22HRc, it is solution annealed and is free from cold work intended to enhance mechanical properties.
It is the last two here that concern me, not the max hardness.
I see a lot of material certificates claiming that the material meets NACE MR0175, but commonly the yield strength is up on what i would expect from a material that has been solution annealed and the material has been cold drawn as a final process. How can that be shown to comply with the statement in Table A.6?
Cold drawing at the end of the processing is designed for dimensional tolerance but there will be an increase in properties that cannot be specified as 'incidental'.
Regards.
I have a question on interpretation of NACE MR0175 in regard to compliance of Austenitic Stainless Steel (e.g. 304 / 316).
Table A.6 in Part 3 indicates that this type of material is acceptable as long as the hardness is not greater than 22HRc, it is solution annealed and is free from cold work intended to enhance mechanical properties.
It is the last two here that concern me, not the max hardness.
I see a lot of material certificates claiming that the material meets NACE MR0175, but commonly the yield strength is up on what i would expect from a material that has been solution annealed and the material has been cold drawn as a final process. How can that be shown to comply with the statement in Table A.6?
Cold drawing at the end of the processing is designed for dimensional tolerance but there will be an increase in properties that cannot be specified as 'incidental'.
Regards.





RE: Austenitic Stainlees steel - NACE Compliance
Given that ISO 15156-3 includes environmental limits for the application of austenitic stainless steels, it should not be within the remit of the material supplier to certify compliance because they will have no knowledge of the environmental exposure.
Steve Jones
Corrosion Management Consultant
http://www.linkedin.com/pub/8/83b/b04
All answers are personal opinions only and are in no way connected with any employer.
RE: Austenitic Stainlees steel - NACE Compliance
I probably should have referred to the current edition of the NACE document also. This comment is not in 2009 edition.
I agree, compliance to NACE MR0175 / ISO 15156 can only be applicable to material processing and not on environmental exposure.
Thanks Again.
RE: Austenitic Stainlees steel - NACE Compliance