Title:
H-SHAPED STEEL
Document Type and Number:
WIPO Patent Application WO/2022/185632
Kind Code:
A1
Abstract:
Provided is an H-shaped steel having an excellent coating durability and strength-toughness balance. The H-shaped steel has: a composition containing, by mass, 0.05 to 0.20% of C, 0.05 to 1.00% of Si, 0.50 to 2.00% of Mn, 0.003 to 0.035% of P, 0.035% or below of S, 0.01 to 0.50% of Cu, and 0.01 to 0.50% of Ni, and further containing one or more substances selected from the group consisting of 0.005 to 0.30% of W and 0.005 to 0.50% of Mo, the following relationship being satisfied by Cu, P, W, and Mo; a tensile strength of 400 MPa or above; a yield strength of 235 MPa or above; and a vE0 of 27 J or above. 0.25 ≤ 2.6 × [%Cu] + 0.8 × [%P] + 4.2 × [%W] + 1.1 × [%Mo] ≤ 1.30 The [%Cu], [%P], [%W], and [%Mo] respectively represent the Cu, P, W, and Mo content (mass%), and the value is zero if the respective element is not contained.
Inventors:
ANDO KEISUKE (JP)
OHTSUBO HIROFUMI (JP)
MIURA SHINICHI (JP)
NAKAMURA NAOTO (JP)
SHIOTANI KAZUHIKO (JP)
OHTSUBO HIROFUMI (JP)
MIURA SHINICHI (JP)
NAKAMURA NAOTO (JP)
SHIOTANI KAZUHIKO (JP)
Application Number:
PCT/JP2021/043489
Publication Date:
September 09, 2022
Filing Date:
November 26, 2021
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D8/00; C22C38/00; C22C38/16; C22C38/60
Domestic Patent References:
| WO2019116520A1 | 2019-06-20 |
Foreign References:
| JP2005272949A | 2005-10-06 | |||
| JP2011106006A | 2011-06-02 | |||
| JP2012122116A | 2012-06-28 | |||
| JP2018040031A | 2018-03-15 | |||
| CN104630625A | 2015-05-20 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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