Abstract
This paper presents the method for determination of the time of further safe service for welded joints of boiler components
after exceeding the design work time. The evaluation of the life of the parent material and its welded joints was performed. Microstructure
investigations using a scanning electron microscope, investigations of strength properties, impact testing, hardness
measurements and abridged creep tests of the basic material and welded joints were carried out. The investigations described in
this paper allowed the time of further safe service of the examined components made of 13CrMo4-5 steel to be determined. The
method for determination of the time of safe service of boiler components working under creep conditions allows their operation
beyond the design service life. The obtained results of investigations are part of the materials database developed by the Institute
for Ferrous Metallurgy.
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