Analisis Kualitas Sambungan Las Kampuh V dan Double V Menggunakan Self Shielded Fcaw pada Baja Karbon Rendah Astm A36 Uji Dpt, Tarik dan Bending

This research was conducted to evaluate the weld joint quality of V-groove and double V-groove configurations on ASTM A36 low carbon steel using the Self Shielded Flux-Cored Arc Welding (FCAW-SS) method. ASTM A36 was selected as the base material due to its favorable mechanical properties, excellent weldability, and wide application in construction and manufacturing. The welding process was carried out on steel plates with a thickness of 10 mm using E71T-1C wire, under controlled parameters of 140 A current, 24 V voltage, and 1G welding position. The weld quality was assessed through Dye Penetrant Testing (DPT), tensile testing, and bending testing. The Dye Penetrant Testing DPT results showed that the double V-groove joints exhibited fewer and smaller surface defects compared to the V-groove joints, indicating better weld homogeneity. Tensile testing demonstrated an average maximum strength of 277.645 MPa for the V-groove and 301.904 MPa for the double V-groove, reflecting an improvement of approximately 8.7% in the double V-groove. The bending tests revealed that the double V-groove joints were able to maintain structural integrity without significant cracks, while the V-groove joints tended to show defect indications under bending loads. Based on these findings, the double V-groove configuration is considered superior in terms of both strength and toughness, and therefore recommended for structural and manufacturing applications requiring high-quality joints in ASTM A36 low carbon steel.