ASTM A789 and A790 show a maximum carbon content of .05 for UNS S32760 while A240, A276, A182, A479 and A473 list the maximum for this grade as .030. We have been unable to identify a valid technical reason for the difference. Elevated carbon levels in duplex stainless steels tend to be detrimental to their performance. Hence, we propose to reduce the maximum carbon content for UNS S32760 to .030 max. in A789 and A790.
Keywordsduplex stainless steel; ferritic/austenitic stainless steel; seamless steel pipe; stainless steel pipe; steel pipe; welded steel pipe;
Ballot Item Approved