H-SECTION STEEL AND METHOD OF PRODUCING THE SAME

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United States of America Patent

APP PUB NO 20150361664A1
SERIAL NO

14763344

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Abstract

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An H-section steel has a predetermined chemical composition, an Nb content and a B content satisfy Nb+125×B≧0.075%, a thickness of a flange is 12 mm to 40 mm, and in a thickness center portion and ¼ flange width portion of the flange, a metallographic structure of a cross-section perpendicular to a rolling direction contains pearlite having a distribution density of 3.2×10−3 units/μm2 or lower and the remainder is formed of ferrite and bainite.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL & SUMITOMO METAL CORPORATIONTOKYO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
ICHIKAWA, Kazutoshi Kimitsu-shi, JP 12 13
ITO, Hidetoshi Kimitsu-shi, JP 41 106
MITSUYASU, Kazuaki Osaka, JP 6 7
ONODERA, Noriaki Osaka, JP 11 119
YAMAMOTO, Kohichi Hadano-shi, JP 16 65

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