Nippon Steel Corporation has developed a new TS530 MPa grade steel plate for low temperature service excellent in weldability and resistance to the ammonia-induced SCC applicable to the tank for multi-purpose gas carriers. The steel was developed on the basis of the Continuous on-line Control Process (CLC) and technologies for enhancing Heat Affected Zone (HAZ) toughness such as HTUFF (High HAZ Toughness technology with Fine microstructure imparted by Fine particles) and Ti oxide technology. According to the design guideline of the IGC code, the design stress of steel material must be 1/3 of the lower limit of its tensile strength (TS) or 1/2 of the lower limit of YS, whichever the smaller. In the development study of the new plate product, its target TS was provisionally set at 530 MPa. The present paper describes the material properties of the developed TS530 MPa class steel for low temperature service. The developed steel is for plates having a strength higher than that of a conventional TS490 MPa grade low-temperature steel and despite the high strength, have an excellent low-temperature toughness and a YS controlled to 440 MPa or less. The steel plate product has been actually applied to Bi-lobe type LPG tanks.


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    Titel :

    530 MPa tensile strength grade steel plate for multi-purpose gas carrier


    Weitere Titelangaben:

    Grobbleche mit 530 MPa Mindestzugfestigkeit für Mehrzweckgastankschiffe


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2004


    Format / Umfang :

    3 Seiten, 4 Bilder, 4 Tabellen, 3 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





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