The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 07, 2000
Filed:
Apr. 30, 1999
Hiromasa Takada, Muroran, JP;
Masayuki Shibata, Muroran, JP;
Motohide Mori, Toyota, JP;
Atsuo Tanaka, Toyota, JP;
Nippon Steel Corporation, Tokyo, JP;
Toyoda Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A steel for machine structural use which realizes excellent fracture splitability and fatigue strength in its as-hot forged formed articles, and which comprises, based on weight, 0.2 to less than 0.35% of C, 0.1 to 1.1% of Si, 0.1 to less than 0.3% of Mn, 0.01 to 0.2% of P, 0.01 to 0.2% of S, greater than 0.2 to 0.5% of V, 0.01 to 0.1% of Ti, 0.005 to 0.02% of N and the balance of Fe and unavoidable impurities. The steel further comprises, if necessary, one or at least two of the following elements in the following amount or amounts: 0.005 to 0.05% of Al and/or 0.05 to 0.5% of Nb, 0.1 to 0.5% of Cr and 0.1 to 0.5% of Mo.