NARROW-GAP, GAS-SHIELDED ARC WELDED JOINT

摘要

In this welded joint obtained by means of a multilayer buildup of narrow-gap, gas-shielded arc welds at thick steel members having a plate thickness of at least 22 mm, the weld depth at the bottom of the thick steel members is at least 1.5 mm, and furthermore the total amount of oxygen (O) and sulfur (S) contained in the welded metal is caused to be in the range of 400-1000 mass ppm inclusive.