A Study on the Fatigue Strength of Welded Joints of Duplex Stainless-Clad Steel Plates for Application in Chemical Tankers

Abstract

Fatigue tests of butt welded-joints and non-load-carrying full-penetration cruciform welded joints that are composed of newly developed and commercialized duplex stainless SUS329J3L(UNS S32205)-clad steel plates were carried out to determine their potential for application in the cargo-tank structures of chemical tankers. The fatigue strength of these welded joints was evaluated by comparing them with welded joints that are composed of conventional austenitic stainless SUS316L(UNS S31603)-clad steel plate. The cargo-tank construction of chemical tankers using SUS329J3L-clad steel plate was superior to that of conventional tankers, which confirms the suitable fatigue strength of the SUS316L-clad steel plate.