Gaseous Compositions in Welded Metals of Austenitic Stainless Steel

Abstract

First of all, authors confirmed that the hydrogen have been absorbed by welded metal of austenitic stainless steel is holding on non-diffusible state as shown in Table 2.
Next, gaseous compositions in welded metal as shown in Table 3 are measured with vaccume fusion analysis. The test results revealed that;
a) Gaseous compositions in normal welded metal produced by inert gas arc welding are nearly equal to each compositions in filler metals as shown in Fig. 1.
b) Normal welded metals produced by manual arc welding with coated electrode have been increased hydrogen and oxygen than filler metal.
c) Principal gaseous composition in slag inclusion is oxygen, and its in blow hole is nitrogen.