Mechanical and corrosion tests simulating different offshore environments have been performed on ten different types of duplex and superduplex welded joints prepared with three types of filler materials and with SMAW, GTAW and GMAW processes. In the as welded conditions, the tensile strength is always equivalent to that of the parent material. The impact strength at lower temperatures is influenced by the oxygen content of the weld metal and also by its composition. Among the superduplex filler material, high nickel superduplex and nickel base alloy fillers lead to higher impact strength at low temperature. In the heat treated condition, superduplex with nitrogen presents very high impact strength. The duplex UR 45N+ and superduplex UR 52 N+ present a real improvement in corrosion resistance compared to standard 22Cr. Corrosion tests in representative offshore media confirm the advantages of UR 52N+ superduplex in welded conditions.
Superduplex stainless steels for off-shore applications: high performance welded-joints
Rostfreie Superduplexstähle für Offshore-Technik: Hochwertige Schweißverbindungen
1995
10 Seiten, 8 Bilder, 5 Tabellen, 6 Quellen
Conference paper
English
nichtrostender Stahl , austenitisch-ferritischer Stahl , Duplex-Gefüge , Erdölindustrie , Meereskonstruktion , Schweißnaht , Tagungsband , Kongress , Werkstoffprüfung , Korrosionsbeständigkeit , Schweißverbindung , Schweißgut , mechanische Eigenschaft , Korrosionsversuch , Duplex-Stahl , Chrom-Nickel-Molybdän-Stahl
Design curves of superduplex stainless steels in seawater representing umbilicals
Tema Archive | 2006
|Influence of artificial seawater on the cyclic response of superduplex stainless steels
Tema Archive | 2005
|Coupling of superduplex stainless steel and cast nickel-aluminium bronze in sea water
Tema Archive | 1999
|