A Review of Challenges to Hastelloy – C
Series Weld Overlay
Manish V. Mehta, Jay J. Vora, and Mrunalkumar D. Chaudhari
Abstract Hastelloy – C series weld overlay is an area of great significance in the
present chemical processing industries, pressure vessel, and heat exchanger industries. Hastelloy – C series of alloys has been one of the least studied and understood
classes of materials. The purpose of this studied is to understand and compare the
performance of Hastelloy – C series nickel–chromium–molybdenum alloys with the
view of metallurgical, mechanical, and physical properties, corrosion resistance, and
weld overlay aspects. Characteristics of various nickel and nickel-based alloys with
a focus on the Hastelloy – C series have been presented through a comparison of
physical and mechanical properties, applications, and corrosion behavior in different
atmospheres. A comprehensive review has been done to study the effect of alloying
element addition on phase stability, the formation of topological-closed-packed phase
(TCP), transformation sequence of Hastelloy C-4, C-276, and C-22. The importance
of dilution for weld overlay, selection of welding process, selection of filler wire,
recommended joint geometry, and weld sequencing for Hastelloy – C series weld
overlay has been discussed in detail. This review will help to understand the effect
of high Mo with Fe and W on the formation of TCP phases, the corrosion behavior
of C-2000 in an oxidizing and reducing atmosphere, and the role of dilution in weld
overlay from conventional and advanced conventional welding process point of view.
Keywords Hastelloy – C series alloy · Corrosion resistance · Weld overlay · TCP
phases
M. V. Mehta (B)
Metallurgy Department, Government Polytechnic, Rajkot, Gujarat 360003, India
e-mail: manishmehta019@gmail.com
J. J. Vora
Department of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, Gujarat, India
M. D. Chaudhari
Department of Mechanical Engineering, L.D. College of Engineering, Ahmedabad 380015,
Gujarat, India
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
A. K. Parwani et al. (eds.), Recent Advances in Mechanical Infrastructure,
Lecture Notes in Intelligent Transportation and Infrastructure,
https://doi.org/10.1007/978-981-33-4176-0_13
157
Series Weld Overlay
Manish V. Mehta, Jay J. Vora, and Mrunalkumar D. Chaudhari
Abstract Hastelloy – C series weld overlay is an area of great significance in the
present chemical processing industries, pressure vessel, and heat exchanger industries. Hastelloy – C series of alloys has been one of the least studied and understood
classes of materials. The purpose of this studied is to understand and compare the
performance of Hastelloy – C series nickel–chromium–molybdenum alloys with the
view of metallurgical, mechanical, and physical properties, corrosion resistance, and
weld overlay aspects. Characteristics of various nickel and nickel-based alloys with
a focus on the Hastelloy – C series have been presented through a comparison of
physical and mechanical properties, applications, and corrosion behavior in different
atmospheres. A comprehensive review has been done to study the effect of alloying
element addition on phase stability, the formation of topological-closed-packed phase
(TCP), transformation sequence of Hastelloy C-4, C-276, and C-22. The importance
of dilution for weld overlay, selection of welding process, selection of filler wire,
recommended joint geometry, and weld sequencing for Hastelloy – C series weld
overlay has been discussed in detail. This review will help to understand the effect
of high Mo with Fe and W on the formation of TCP phases, the corrosion behavior
of C-2000 in an oxidizing and reducing atmosphere, and the role of dilution in weld
overlay from conventional and advanced conventional welding process point of view.
Keywords Hastelloy – C series alloy · Corrosion resistance · Weld overlay · TCP
phases
M. V. Mehta (B)
Metallurgy Department, Government Polytechnic, Rajkot, Gujarat 360003, India
e-mail: manishmehta019@gmail.com
J. J. Vora
Department of Mechanical Engineering, School of Technology, Pandit Deendayal Petroleum
University, Gandhinagar 382007, Gujarat, India
M. D. Chaudhari
Department of Mechanical Engineering, L.D. College of Engineering, Ahmedabad 380015,
Gujarat, India
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
A. K. Parwani et al. (eds.), Recent Advances in Mechanical Infrastructure,
Lecture Notes in Intelligent Transportation and Infrastructure,
https://doi.org/10.1007/978-981-33-4176-0_13
157