SS400 맞대기용접 이음의 용접진행방법 변화에 대한 강도 비교

Comparison of Intensity about Welding Process Changes of Butt Welded Joint with SS400

This study of the aimed to compare the TIG welding method of back bead with CO2 weld, because CO2 welded pipe butt weld defects happen when you re going to re-weld. To check the status of weld radiography was confirmed that none of the defects was conducted, hardness and tensile strength were compared. CO2 back bead is higher in the test of hardness. An welded sheet showed the similar tensile strength, yield strength, elongation with substrate. It is seems that it is more stable to TIG welding on back bead with an Instruction or welding specification then any other methods