Mechanical and corrosion properties of super duplex stainless steel weldments

Martti Vilpas, Jouko Ruusila, Veli Kujanpää, Risto Karppi

    Research output: Book/ReportReport

    Abstract

    The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.
    Original languageEnglish
    Place of PublicationEspoo
    PublisherVTT Technical Research Centre of Finland
    Number of pages98
    ISBN (Print)951-38-4453-6
    Publication statusPublished - 1993
    MoE publication typeNot Eligible

    Publication series

    SeriesVTT Tiedotteita - Meddelanden - Research Notes
    Number1519
    ISSN1235-0605

    Fingerprint

    Welds
    Stainless steel
    Corrosion
    Toughness
    Metallography
    Weldability
    Mechanical testing
    Pitting
    Nitrides
    Austenite
    Ferrite
    Corrosion resistance
    Hot Temperature
    Metals

    Keywords

    • duplex steels
    • dual phase steels
    • weldments
    • welded joints
    • stainless steels
    • weldability
    • mechanical properties
    • corrosion tests
    • corrosion resistance
    • evaluation
    • pitting
    • metallography
    • toughness
    • stress corrosion

    Cite this

    Vilpas, M., Ruusila, J., Kujanpää, V., & Karppi, R. (1993). Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1519
    Vilpas, Martti ; Ruusila, Jouko ; Kujanpää, Veli ; Karppi, Risto. / Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo : VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).
    @book{8872611eaddf4e208e79acebea035737,
    title = "Mechanical and corrosion properties of super duplex stainless steel weldments",
    abstract = "The report deals with the weldability of cast and rolled super duplex stainless steels (27 {\%} Cr, 7 8 {\%} Ni, 3 4 {\%} Mo, 0.2 2.7 {\%} Cu and 0,2 0,3 {\%} N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.",
    keywords = "duplex steels, dual phase steels, weldments, welded joints, stainless steels, weldability, mechanical properties, corrosion tests, corrosion resistance, evaluation, pitting, metallography, toughness, stress corrosion",
    author = "Martti Vilpas and Jouko Ruusila and Veli Kujanp{\"a}{\"a} and Risto Karppi",
    year = "1993",
    language = "English",
    isbn = "951-38-4453-6",
    series = "VTT Tiedotteita - Meddelanden - Research Notes",
    publisher = "VTT Technical Research Centre of Finland",
    number = "1519",
    address = "Finland",

    }

    Vilpas, M, Ruusila, J, Kujanpää, V & Karppi, R 1993, Mechanical and corrosion properties of super duplex stainless steel weldments. VTT Tiedotteita - Meddelanden - Research Notes, no. 1519, VTT Technical Research Centre of Finland, Espoo.

    Mechanical and corrosion properties of super duplex stainless steel weldments. / Vilpas, Martti; Ruusila, Jouko; Kujanpää, Veli; Karppi, Risto.

    Espoo : VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).

    Research output: Book/ReportReport

    TY - BOOK

    T1 - Mechanical and corrosion properties of super duplex stainless steel weldments

    AU - Vilpas, Martti

    AU - Ruusila, Jouko

    AU - Kujanpää, Veli

    AU - Karppi, Risto

    PY - 1993

    Y1 - 1993

    N2 - The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.

    AB - The report deals with the weldability of cast and rolled super duplex stainless steels (27 % Cr, 7 8 % Ni, 3 4 % Mo, 0.2 2.7 % Cu and 0,2 0,3 % N) with special reference to the mechanical and corrosion properties of welded joints. The test welds have been evaluated using metallography, mechanical testing as well as pitting and stress corrosion tests. The results indicate that the welded joints can exhibit acceptable joint properties when the type of consumable and the level of heat input are properly chosen. Matching type consumables with a heat input close to 10 15 kJ/cm yielded good results. Significantly lower heat inputs result in a lower weld metal austenite content and formation of nitrides in ferrite, resulting in reduced toughness. On the other hand, excessively high heat inputs tend to enhance various precipitation reactions, reducing HAZ toughness and corrosion resistance.

    KW - duplex steels

    KW - dual phase steels

    KW - weldments

    KW - welded joints

    KW - stainless steels

    KW - weldability

    KW - mechanical properties

    KW - corrosion tests

    KW - corrosion resistance

    KW - evaluation

    KW - pitting

    KW - metallography

    KW - toughness

    KW - stress corrosion

    M3 - Report

    SN - 951-38-4453-6

    T3 - VTT Tiedotteita - Meddelanden - Research Notes

    BT - Mechanical and corrosion properties of super duplex stainless steel weldments

    PB - VTT Technical Research Centre of Finland

    CY - Espoo

    ER -

    Vilpas M, Ruusila J, Kujanpää V, Karppi R. Mechanical and corrosion properties of super duplex stainless steel weldments. Espoo: VTT Technical Research Centre of Finland, 1993. 98 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 1519).