Ykk Corporation

Jfe Steel Corporation

Yu Hashimoto

Madoka Nanbu

Hitoshi Kaneko

Shinjiro Kaneko

Yoshihiko Ono

Takuya Hirashima

Natsuko Saitsu

The high strength steel sheet of the present invention has a specific chemical composition, and contains, in terms of area fraction relative to an entire steel microstructure, 30% or more and 100% or less ferrite, 0% or more and 70% or less martensite, and less than 20% in total of pearlite, bainite and retained austenite, and the ferrite contains, in terms of area fraction relative to an entire microstructure, 0% or more and 10% or less non-recrystallized ferrite, with a difference of the area fraction of the non-recrystallized ferrite in the longitudinal direction of the steel sheet of 5% or smaller.

High strength steel sheet, high strength member, and methods for manufacturing the same

A hook part includes a hook main body; a latch for closing the hook main body; and a shaft to which the base end of the latch is integrally coupled, the shaft extending away from the hook main body along the rotational axis such that coupling between the attachment part and the hook part is ensured. A latch includes a spring portion provided closer to the base end of the latch; and a latch main body coupled with the coupled portion via the spring portion. The spring portion is elastically configured to enable urging of the latch away from the hook main body. The connection point of the latch and the shaft is farther from the hook main body along the rotational axis than the connection point of the hook main body and the coupled portion.

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Tokyo, Japan

Yu Hashimoto