Weldability between steel type 304H and steel type P91 for high temperature applications
Date Issued
2023
Author(s)
Krstevska, Aleksandra
Poser B. Maja
Abstract
This paper presents research about weldability
between two dissimilar steels, martensitic steel P91
and 304H austenitic steel. Both materials are being
preferred as a structural material for higher
temperature applications due to their good
mechanical properties at high temperatures. The
mechanical properties at high temperature, such as
tensile strength and creep resistance, are very
important factors that ensure the application of
materials. The P91 is modified martensitic Cr steel
with higher amount of chromium which improves
the higher temperature strength and molybdenum
that increases creep resistance. On the other hand,
the 304H represents advance austenitic stainless
steel with controlled carbon content, which makes it
ideal for applications requiring good mechanical
properties at elevated temperatures. With
increasing the demand of high efficiency in the
power generation industry the high temperature
applications usually require joints between
advanced austenitic stainless steels and new class
martensitic stainless steels in order to achieve the
goal with the increased steam parameters.
Therefore, this paper focuses on the weldability
assessment between these two different steels and
the characteristics of the weld metal.
between two dissimilar steels, martensitic steel P91
and 304H austenitic steel. Both materials are being
preferred as a structural material for higher
temperature applications due to their good
mechanical properties at high temperatures. The
mechanical properties at high temperature, such as
tensile strength and creep resistance, are very
important factors that ensure the application of
materials. The P91 is modified martensitic Cr steel
with higher amount of chromium which improves
the higher temperature strength and molybdenum
that increases creep resistance. On the other hand,
the 304H represents advance austenitic stainless
steel with controlled carbon content, which makes it
ideal for applications requiring good mechanical
properties at elevated temperatures. With
increasing the demand of high efficiency in the
power generation industry the high temperature
applications usually require joints between
advanced austenitic stainless steels and new class
martensitic stainless steels in order to achieve the
goal with the increased steam parameters.
Therefore, this paper focuses on the weldability
assessment between these two different steels and
the characteristics of the weld metal.
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0354-79652301029K.pdf
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Journal of Welding and welded structures vol.68 (1), pp.29-36, 2023
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