2017DIN EN ISO 17781:2017-11 Petroleum, petrochemical and natural gas industries - Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels (ISO 17781:2017); English version EN ISO 17781:2017
2017DIN EN ISO 17781:2017 Petroleum, petrochemical and natural gas industries - Test methods for quality control of microstructure of ferritic/austenitic (duplex) stainless steels (ISO 17781:2017); English version EN ISO 17781:2017
1970DIN EN ISO 17781 E:2016-08 Ferrite/Austenite for the Petroleum, Petrochemical and Gas Industry (Draft)
1970DIN EN ISO 17781 E:2015-04 Ferrite/Austenite for the Petroleum, Petrochemical and Gas Industry (Draft)