Properties of FeCrAl Alloys and Austenitic Stainless Steel for Boiler Environments

Rami Pohja, Hannu Hänninen

    Research output: Book/ReportReport

    Abstract

    This state-of-the-art report deals with questions relating to high temperature materials for boiler applications. Of particular interest are FeCrAl alloys and an austenitic Esshete 1250 stainless steel as well as a superaustenitic Sanicro 28 alloy. The joining methods for alloys in question are also discussed in the report. Recent studies have shown that Esshete 1250 and Sanicro 28 alloy exhibit relatively good corrosion resistance in environments containing chlorine at temperatures around 500 °C, which makes them good candidate alloys for waste-fired boiler applications. Conventional FeCrAl alloys exhibit excellent corrosion resistance at temperatures around 1000 °C, but the mechanical properties are poor at high temperatures. The oxide dispersion strengthened FeCrAl alloys exhibit improved mechanical properties, but the joining of ODS alloys by fusion welding is quite challenging. FeCrAl alloys are also a good candidate material for coatings due to their excellent corrosion resistance. However, when coating is carried out by fusion welding, the welding parameters should be carefully controlled in order to avoid cracking. Altogether, FeCrAl alloys may offer a cost-effective solution for some boiler applications
    Original languageEnglish
    Place of PublicationEspoo
    PublisherAalto University
    Number of pages97
    ISBN (Print)978-952-60-3197-2
    Publication statusPublished - 2010
    MoE publication typeD4 Published development or research report or study

    Publication series

    SeriesAalto yliopiston teknillinen korkeakoulu: Koneenrakennustekniikan laitos
    Volume2/10

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    Keywords

    • boiler environments
    • FeCrAl alloys
    • ODS alloys
    • high temperature materials

    Cite this

    Pohja, R., & Hänninen, H. (2010). Properties of FeCrAl Alloys and Austenitic Stainless Steel for Boiler Environments. Aalto University. Aalto yliopiston teknillinen korkeakoulu: Koneenrakennustekniikan laitos, Vol.. 2/10