Weldability of austenitic heat-resisting steels
Date Issued
2024
Author(s)
Grncharevska, Elena
Krstevska, Aleksandra
Abstract
Austenitic heat-resisting steels are used in a
wide range of industries. Their use is motivated not
only by their excellent mechanical properties but
also due to their excellent resistance to corrosion
and the ability to withstand high temperatures.
These steels are prone to defects and challenges
during welding because of their high content of Cr,
Ni, Al, and other alloying elements. The main
problem is the high heat energy input, which
causes differences in structure between the welded
joint and the surrounding area. The relatively high
heat input and cooling in the heat-affected zone
(HAZ) causes carbide formation and, as a result,
coarse grain formation, which is undesirable for
obtaining favourable mechanical properties. This
study investigates the weldability of two heatresistant
austenitic steels (EN X12CrNi23-13 and
EN X8CrNi25-21) using the gas tungsten arc
welding (GTAW) technique. Both materials are
separately analyzed, and the results are discussed
in terms of potential welding techniques and
technological plan improvements to achieve highquality
welds without pre-heating or any other
additional post-welding heat treatment, which is
important for the industry because it can reduce
production time and cost.
wide range of industries. Their use is motivated not
only by their excellent mechanical properties but
also due to their excellent resistance to corrosion
and the ability to withstand high temperatures.
These steels are prone to defects and challenges
during welding because of their high content of Cr,
Ni, Al, and other alloying elements. The main
problem is the high heat energy input, which
causes differences in structure between the welded
joint and the surrounding area. The relatively high
heat input and cooling in the heat-affected zone
(HAZ) causes carbide formation and, as a result,
coarse grain formation, which is undesirable for
obtaining favourable mechanical properties. This
study investigates the weldability of two heatresistant
austenitic steels (EN X12CrNi23-13 and
EN X8CrNi25-21) using the gas tungsten arc
welding (GTAW) technique. Both materials are
separately analyzed, and the results are discussed
in terms of potential welding techniques and
technological plan improvements to achieve highquality
welds without pre-heating or any other
additional post-welding heat treatment, which is
important for the industry because it can reduce
production time and cost.
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0354-79652401005G.pdf
Description
Journal of Welding and welded structures vol.69 (1), pp.5-16,2024
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600.75 KB
Format
Adobe PDF
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