Mechanical Properties of Weld Joint in Refrigeration Tubes Welded by TIG Process

Abstract

This study involves the welding technology of carbon steel pipes which is widely used in many engineering applications, in particular refrigeration systems and boilers. The chemical composition of this metal shows that are close to steel grade A192 according to ASTM standards. This metal shows an excellent weldability and enhanced potential for the use of high strength TIG weld consumable. TIG weld filler type ER70S-6 is used to join two pieces of steel pipes using TIG welding machine. This experimental work also involves the evaluation of the integrity and mechanical prosperities of the weld joint. That was done by conducting a several destructive and non-destructive tests on the weld joints such as, Tensile, bending, hardness, x-ray and Liquid penetrant). The tests program confirmed that, the weld joint maintains a good mechanical properties and acceptable weld defect

Keywords

ASTM, SMAW, TIG, SAW, MIG, DCSP