Leonard J. The Effect of Welding Pre Heating of SMAW and GTAW on Mechanical Properties of SA .106 Gr. B Pipe of Energi Sengkang Co.Ltd. IJSMM [Internet]. 2017 Apr. 20 [cited 2025 Nov. 3];4(1):273-7. Available from: https://ijsmm.id/index.php/ijsmm/article/view/36