FUSOKIKO CO., LTD.
Sakai-shi, JP
FUSOKIKO CO., LTD. Patent applications | ||
Patent application number | Title | Published |
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20120230800 | High-Strength Bolt - Provided is a high-strength bolt which has a tensile strength of 1,200 MPa or more while exhibiting excellent ductility and delayed facture resistance, and further has an excellent impact toughness which had not been obtained in the conventional high-strength bolt. The high-strength bolt has a tensile strength of 1.2 GPa or more and includes a threaded portion and cylindrical neck portion. The bolt has K of 0.8 or more and satisfies Ho09-13-2012 | |