ELECTRIC-RESISTANCE-WELDED STEEL PIPE WITH EXCELLENT WELD QUALITY AND METHOD FOR PRODUCING SAME

摘要

An electric-resistance-welded steel pipe that has excellent weld quality and is suitable for use as an oil well pipe or line pipe, characterized in that a steel plate constituting the base material of the electric-resistance-welded steel pipe has a given composition, the Ca, O, S, Ce, La, and Al content satisfy the formula, the weld of the electric-resistance-welded steel pipe contains oxide-based inclusions containing Ce and/or La, and the oxide-based inclusions have a major axis/minor axis ratio of 2.5 or less.