Cr-Mo steel pipe and welding method thereof

Details Cr-Mo steel pipe and welding method thereof Cr-Mo steel pipe and welding method thereof

1993-03-25

1994-09-27

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

148334, 148909, 138177, 219 61, C22C 3812, C22C 3806

Patent

active

053505611

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.

REFERENCES:
patent: 4804021 (1989-02-01), Hasegawa et al.
patent: 5213633 (1993-05-01), Hada et al.
Toshimi Matsumoto et al, "Reduction of Carbon Content and Provemention of Weld Cracking in 11/4Cr-1/2Mo Steel", The Quarterly Journal of the Japan Welding Society, vol. 3, No. 2, 1985, pp. 135-143.

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