H SECTION AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Jul 4, 2019
app pub date -
Dec 21, 2017
filing date -
Dec 21, 2017
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Abstract
This H section includes, as a chemical composition, C, Si, Mn, Nb, V, Ti, and N; in which the H section includes, as a metallographic structure, ferrite of 60 area % to less than 100 area %, an average grain size of this ferrite is 1 μm to 30 μm, a thickness of a flange is 20 mm to 140 mm, tensile yield stress is 385 MPa to 530 MPa, and Charpy absorbed energy at −20° C. is 100 J or more.
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