Mechanical Properties of Similar and Dissimilar Metals of Monel 400 and SS 321 by Using Gas Tungsten Arc Welding (GTAW) Process

In the present study the fabrication of joints between the nickel base alloys and steels of various grades have been under taken, joining of these metals has assumed new importance by virtue of their widespread in nuclear and aerospace applications. Such joints provide excellent strength, oxidation and corrosion resistance. This paper deals with the study of weldability, and mechanical properties of weld joints of two different alloys such as nickel based alloy- monel 400 and austenitic stainless steel AISI 321. The joining of the similar and dissimilar metals is carried out by GTAW process and by employing two different types of filler rods SS321 and ERNiCrMo-3, Mechanical properties such as Ultimate Tensile Strength, Young’s Modulus ae found as per ASTM testing standards, Percentage of Elongation also found to know the joint efficiency and Microhardness survey across the weld joint to estimate the hardness variations at different locations such as Weld zone of the metal, Heat Affected Zone (HAZ), and Base metal.