Proceedings of the 10th International Conference on Science and Technology (ICST 2024)

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Effect of Post-Weld Heat Treatment of Superduplex Stainless Steel UNS S32750 (SAF 2507) Using ER2594 Filler Metal on Microstructure, Hardness and Corrosion Rate

Authors
Intan Regina Elisabet1, *, Jamasri Jamasri1
1Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
*Corresponding author. Email: intanreginaelysabeth@mail.ugm.ac.id
Corresponding Author
Intan Regina Elisabet
Available Online 1 July 2025.
DOI
10.2991/978-94-6463-772-4_25How to use a DOI?
Keywords
Post welding heat treatment; SDSS UNS S32750; Filler ER2594; Microstructure; Hardness and Corrosion
Abstract

Duplex stainless-steel features a unique microstructure with balanced amounts of ferrite and austenite, achieved through the stabilization of elements like Cr, Mo, Ti, Si, Ni, N, C, and Mn. This balance contributes to excellent corrosion resistance and mechanical strength. In this study, welding was performed on a 3 mm thick plate using a current of 135A, a voltage of 20V, and Direct Current Electrode Negative (DCEN) polarization at a welding speed of 4.5 mm/sec. Post-Welding Heat Treatment (PWHT) annealing was applied at temperatures of 1050℃, 1150℃, and 1200℃ for 10 minutes, followed by slow cooling. The experimental result shows that, VHN increased significantly at 1050℃, while lower temperatures resulted in decreased hardness. The highest tensile strength of 879 MPa was found in the specimen without PWHT, which decreased significantly between 1050℃ and 1150℃ but slightly improved at 1200℃ to 683.01 MPa. The best corrosion resistance was observed at 1050℃, with a low corrosion rate of 0.000237358 mm/year. In contrast, the specimen without PWHT had the worst corrosion resistance, with a rate of 0.001924398 mm/year. In conclusion, PWHT annealing at all temperatures increased hardness but reduced tensile strength, with the best mechanical properties restored at 1050℃, followed by 1150℃ with lower tensile strength.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 10th International Conference on Science and Technology (ICST 2024)
Series
Advances in Engineering Research
Publication Date
1 July 2025
ISBN
978-94-6463-772-4
ISSN
2352-5401
DOI
10.2991/978-94-6463-772-4_25How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Intan Regina Elisabet
AU  - Jamasri Jamasri
PY  - 2025
DA  - 2025/07/01
TI  - Effect of Post-Weld Heat Treatment of Superduplex Stainless Steel UNS S32750 (SAF 2507) Using ER2594 Filler Metal on Microstructure, Hardness and Corrosion Rate
BT  - Proceedings of the 10th International Conference on Science and Technology (ICST 2024)
PB  - Atlantis Press
SP  - 270
EP  - 283
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-772-4_25
DO  - 10.2991/978-94-6463-772-4_25
ID  - Elisabet2025
ER  -