Patent ID: 6866725
Filing Date: 2005-03-15
Classification: C21D,C22C,Y10S

Abstract:
1. A steel pipe excellent in formability characterized by: containing, in mass, C: 0.0005 to 0.30%, Si: 0.001 to 2.0%, Mn: 0.01 to 3.0%, with the balance consisting of Fe and unavoidable impurities; and the 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 the ratio of the X-ray strength in the orientation component of {110}<110> to random X-ray diffraction strength on a plane at the wall thickness center being 3.0 or more.