Analisis Penggunaan Filler Pengelasan Dan Arus Ampere Material Dissimilar Stainless Steel Dan Carbon Steel Terhadap Sifat Mekanik Material Dissimilar

Abstract

This study examines the impact of different fillers (316L for stainless steel and ER70S for carbon steel) on the welding of dissimilar metals (SA-312 TP304L and SA-106 grade B). It evaluates the effects on mechanical properties through hardness and metallographic tests, crucial for piping spool fabrication in methanol plant projects. This study investigates the effect of different welding currents (80A, 90A, 100A) and fillers (ER70S-6 and ER316L) on the properties of welds between low carbon steel (SA-106 Grade B) and stainless steel (SA-312 304L). Results showed variations in hardness and HAZ width, with ER70S-6 generally producing smaller HAZs. The analysis reveals that Vickers hardness tests showed material "A," using ER70S-6 filler at 80A, had the highest hardness with an average of 211.34 HV. In contrast, material "E," using ER316L filler at 90A, had the lowest hardness at 152.11 HV, indicating that both filler type and welding current affect material hardness. Metallographic examination found that the HAZ width for ER70S-6 was smaller, averaging 3.1 mm, compared to 3.7 mm for ER316L. This suggests that the choice of filler and welding current significantly influences both hardness and the size of the heat-affected zone in dissimilar metal welds.