UNE-EN ISO 17781:2017

This International Standard specifies quality control testing methods and test conditions for thecharacterization of microstructure in relation to relevant properties in ferritic/austenitic (duplex)stainless steel components supplied in the solution annealed condition and fabrication welds in the aswelded condition.This International Standard supplements the relevant product and fabrication standards withrespect to destructive testing methods including sampling of test specimens, test conditions and testacceptance criteria to show freedom from deleterious intermetallic phases and precipitates in duplexstainless steels. In addition this International Standard specifies how testing and test results shall bedocumented by the testing laboratory.NOTE 1 This International Standard is based upon experience with duplex stainless steels in offshore oiland gas industry applications including topside and subsea hydrocarbon service, sea water service as well asstructural use.NOTE 2 The austenite spacing is relevant to the susceptibility of duplex stainless steels to hydrogen inducedstress cracking (HISC) in subsea applications where cathodic protection is applied. This falls outside the scope ofthis International Standard. Reference is made to DNV/GL RP-F112 [6].