DefinePK

Abstract

ANSI 304 austenitic steel is alloy steel with high Ni and Cr content, and this steel has high strength, heat resistance, corrosion resistance, is not magnetized, and is especially easy to weld. However, regarding the welding process of ANSI 304 steel, the heat-affected area is very sensitive and leads to hot cracking of the weld metal. The higher hot crack forming characteristics of the Austenitic group than other alloys, along with a higher coefficient of thermal expansion, lower coefficient of thermal conductivity, welding mode, etc., are the factors that strongly affect the quality of ANSI 304 steel welds. Tensile strength and fatigue strength of welds are two important parameters characterizing the life and safety of the structure. In this paper, an experimental method is used to evaluate the influence of welding materials, welding mode, and weld geometry parameters on the tensile strength of welds when welding ANSI 304 steel pipes. Thereby, find the optimal set of welding mode parameters to fabricate the test samples. Using the Weibull distribution function and Loga normal distribution function, the fatigue graph and fatigue regression equation are built to evaluate the fatigue strength of ANSI 304 steel pipe welds.