Steel pipe excellent in formability and method of producing...

Details Steel pipe excellent in formability and method of producing... Steel pipe excellent in formability and method of producing...

2005-03-15

2005-03-15

Yee, Deborah (Department: 1742)

Metal treatment

Stock

Ferrous

C148S330000, C148S333000, C148S334000, C148S335000, C148S336000, C148S590000, C148S909000

Reexamination Certificate

active

06866725

ABSTRACT:
The present invention is a high strength steel pipe excellent in formability in hydroforming and similar forming methods, characterized by: containing, in mass, C of 0.0005 to 0.30%, Si of 0.001 to 2.0%, Mn of 0.01 to 3.0% and appropriate amounts of other elements if necessary, with the balance consisting of Fe and unavoidable impurities; and an average for the ratios of the X-ray strength in the orientation component group of {110}<110> to {111}<110> to random X-ray diffraction strength on a plane at the wall thickness center being 2.0 or more and/or a ratio of the X-ray strength in the orientation component of {110}<110> to random X-ray diffraction strength on the plane at the wall thickness center being 3.0 or more.

REFERENCES:
patent: 6632296 (2003-10-01), Yoshinaga et al.
patent: 5-86419 (1993-04-01), None
patent: 5-212439 (1993-08-01), None
patent: 9-196244 (1997-07-01), None
patent: 10-52713 (1998-02-01), None

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