PSI - Issue 72

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 72 (2025) 172–180

12th Annual Conference of Society for Structural Integrity and Life (DIVK12) Review of current welding technology and literature review of weld repair without post-weld heat treatment for X10CrMoVNb9-1 steel in dissimilar metal welds Aleksandra Krstevska a, *, Filip Zdraveski a , Marjan Gavriloski a , Elisaveta Doncheva a , Martin Petreski a a Department of Welding and welded structures, Faculty of Mechanical Engineering Skopje, Republic of N. Macedonia Abstract This paper investigates the current welding methodology used for steel X10CrMoVNb9-1 and evaluates the possibility of performing weld repairs without post-weld heat treatment (PWHT). X10CrMoVNb9-1 is a martensitic 9% Cr alloy widely used in high-temperature applications such as power plants and petrochemical industries, due to its exceptional creep strength, oxidation resistance, and mechanical properties at elevated temperatures. The steel requires precise welding technology to maintain its mechanical properties. Despite its excellent high-temperature properties, in-service degradation due to creep and erosion requires repair and maintenance strategies. This research focuses on current welding technology and evaluating alternative repair strategies to mitigate the need for PWHT. Cold repair techniques, which involve repairs without the need for post-weld heat treatment (PWHT), were investigated due to their potential to minimize time and operational costs. The literature review gives insights into the existing knowledge on the cold repair of X10CrMoVNb9-1, focusing on microstructural characterization, and understanding of mechanical properties following cold repairs. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia

Keywords: X10CrMoVNb9-1; post-weld heat treatment; cold repair; dissimilar metal welds

* Corresponding author. Tel.:/; fax: /. E-mail address: aleksandra.krstevska@mf.edu.mk

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.089