Analisa Variasi Arus Ampere Terhadap Jenis Cacat Sambungan Las Smaw Butt Join Pengelasan 2g Dengan Mengunakan Metode Ndt Pada Plat Baja Karbon Rendah St-37

Welding machine is a machine that can connect iron into a whole series so it can form a necessary shape, this research is done to know the value of strength in welding work objects. This study used SMAW welding using electrodes E 7016 with different ampre currents namely 70 A, 130 A and 150 A, materials used st37 lowcarbon steel material with a thickness of 10 mm, after welding the workwork body will be carried out ndt testing process with two types of testing namely penetrant test and ultrasonic test test. Based on the results of research on penetranttest t test and ultrasonic testt test with welding current 130A only found one type of defect namely undercut,it can be interpreted that the type of current use 130A is the best type of current, while in currents 130A and 150A found more than one type of defect, namely porocsity cluster defects, lack of fusion, slag inclusion and pore gas in ultrasonic test testing and blow hole and pore gas defects in penetrant test