Investigation on Weldability and Post-Weld Heat Treatment of A 333 Gr.6 and A350LF-2 Steels

Authors : Esin Tuğba Şimşek Çelik, Başar Ersegün Çelik, Şükrü Talaş

Pages : 111-123

Doi:10.52795/mateca.1626403

View : 50 | Download : 40

Publication Date : 2025-04-30

Article Type : Research Paper

Abstract :In this study, as the first welding process, GTAW (Gas Tungsten Arc Welding) welding process was carried out on 9.53 mm thick A 333 Gr.6 pipe and A350LF-2 flange steels using 2.4 mm ER70S-6 electrode and SMAW (Manual Arc Welding) welding process was carried out using 2.5 mm E 7018-1 electrode for filler and cover passes. As the second welding process, GTAW welding process was carried out on 5.49 mm thick A 333 Gr.6 pipe and A350LF-2 flange steels using 2.4 mm ER70S-6 electrode and SMAW welding process was carried out using 2.5 mm E 7018-1 electrode for filler and cover passes. Post-weld heat treatment was applied during the first welding process. No post-weld heat treatment was applied during the second welding process. The effect of heat treatment on some mechanical properties of the materials and the changes that occur after stress relief were investigated for the welds made with the same materials, the same electrodes, the same welding methods but with different thicknesses. Tensile test, bending test, hardness test, notch impact test was performed as mechanical tests of the welded parts, macro images were taken and comparisons were made. As a result, the effects on the weld quality were investigated and results indicate that welding processes were successfully carried out with given filler electrodes and steel pipes.
Keywords : A 333 Gr.6, A350LF-2, GTAW, SMAW

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