Volume 7, Issue 2 (February 2010)

    Use of Fe–31Mn–7.5Al–1.3Si–0.9C Alloy for Fabrication of Resistive Elements

    (Received 8 June 2009; accepted 23 October 2009)

    Published Online: 2010

    CODEN: JAIOAD

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    Abstract

    Austenitic Fe–Mn–Al–Si–C steel provides excellent cold formability and good oxidation resistance for possible fabrication of resistive elements. In this work, austenitic Fe–31Mn–7.5Al–1.3Si–0.9C steel wire was obtained by cold rolling and then tested with respect to oxidation resistance and electrical resistive behavior. After being subjected to an isothermal oxidation test at 700°C in air, this steel exhibited behavior similar to that the AISI 304 stainless steel. When the test was conducted at 800°C, the performance was inferior to that the AISI 304 steel. However, after 40 h of testing, the mass-gain curve stabilized. From these results and the results of the electric resistance tests, the Fe–Mn–Al–Si alloy proved to be a promising candidate for substitution of thermo-resistive alloys of Ni–Cr and Fe–Ni–Cr for use at temperatures of up to 800°C. Such alloys provide the potential for cost performance savings by using lower cost alloying elements.


    Author Information:

    Casteletti, L. C.
    Dept. de Engenharia de Materiais, Aeronáutica e Automobilística, Escola Eng. São Carlos—USP, São Carlos, São Paulo

    Lombardi Neto, A.
    Dept. de Engenharia de Materiais, Aeronáutica e Automobilística, Escola Eng. São Carlos—USP, São Carlos, São Paulo

    Totten, G. E.
    Portland State Univ., Portland, OR

    Heck, S. C.
    Dept. de Engenharia de Materiais, Aeronáutica e Automobilística, Escola Eng. São Carlos—USP, São Carlos, São Paulo

    Fernandes, F. A. P.
    Dept. de Engenharia de Materiais, Aeronáutica e Automobilística, Escola Eng. São Carlos—USP, São Carlos, São Paulo


    Stock #: JAI102605

    ISSN: 1546-962X

    DOI: 10.1520/JAI102605

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    Author
    Title Use of Fe–31Mn–7.5Al–1.3Si–0.9C Alloy for Fabrication of Resistive Elements
    Symposium , 0000-00-00
    Committee B02