Pengelasan GTAW pada Stainless Steel Grade yang Berbeda untuk Aplikasi pada Power Plant

Abstract

This research is conducted to annalyse mechanical properties and microstructure of GTAW for dissimilar stainless steel, 304 and 316L stainless steel. Stainless steel is commonly used on food industries, fertilize, and power plant. Widely stainless steel using due to lifetime and good corrosion resistance. This research is expected to contribute material selection reference and methode and suitable welding parameter for dissimilar welding on power plant's heat exchanger. The materials are 304 and 316L stainless steel which welded by 80, 100, and 120 A of current with 45° V-groove. And ER 309L and 316L filler metals. Then, hardness test and microstructure were conducted on HAZ of 340 stainless steel, weld metal, and HAZ of 316L stainless steel. According of the tests, the highest hardness was obtained on HAZ of 304 stainless steel with 80 A and 316L filler metal, but generally the high hardness was obtained by HAZ of 304 stainless steel with 80 A and 309L filler metal