High strength pipe of an alpha plus beta titanium alloy and method for its manufacture.

摘要

A high-strength α + β type titanium alloy tube and a production method therefor, capable of fully making use of the lightweight, high-strength features of titanium alloy without requiring an extensive cutting work. The tube consists of a high-strength α + β type titanium alloy and has an outer diameter of at least 150 mm and a wall thickness of at least 6 mm, characterized in that the tube has one weld seam in a tube's lengthwise direction, and a ratio of a minimum wall thickness to a maximum wall thickness at portions excluding the weld is 0.95 to 0.99. A production method for the high-strength α + β type titanium alloy tube, wherein a high-strength α + β type titanium alloy plate having a thickness of at least 6 mm is cold-formed into a tubular form by a U-O method or press-bending method, and butting plate edges are welded together.