Cr-Mo steel pipe and welding method thereof

Year	Description
1993	Invention patented by Toshihiro Takamura, Yukio Nishino, Motoaki Oyama, and Akiyoshi Matsushita on March 24th, 1993. Abstract: A Cr-Mo steel pipe having a wall thickness of 5 to 25 mm consisting essentially of 0.03 to 0.10 wt. % C, 0.5 to 1.0 wt. % Si, 0.3 to 0.6 wt. % Mn, 0.02 wt. % or less P, 0.007 wt. % or less S, 1.0 to 1.5 wt. % Cr, 0.45 to 0.65 wt. % Mo, 0.002 to 0.1 wt. % Al, 0.002 to 0.01 wt. % N, and the balance being Fe and unavoidable impurities. In the method of welding the Cr-Mo steel pipe, the Cr-Mo steel pipe is welded by shielded metal arc welding without a preheat treatment and/or a post weld heat treatment.
Source: selected by the editor from original sources.

Invention: Cr-Mo steel pipe and welding method thereof