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. 04, 2008
Filed:
Aug. 06, 2004
Naoki Iwama, Tokai, JP;
Susumu Owaki, Tokai, JP;
Masao Uchiyama, Tokai, JP;
Isao Fujii, Tokai, JP;
Syoji Nishimon, Tokai, JP;
Norimasa Tsunekage, Himeji, JP;
Kazuhiro Kobayashi, Himeji, JP;
Motohide Mori, Toyota, JP;
Kazutaka Ogo, Aichi-gun, JP;
Kunio Naito, Aichi-gun, JP;
Naoki Iwama, Tokai, JP;
Susumu Owaki, Tokai, JP;
Masao Uchiyama, Tokai, JP;
Isao Fujii, Tokai, JP;
Syoji Nishimon, Tokai, JP;
Norimasa Tsunekage, Himeji, JP;
Kazuhiro Kobayashi, Himeji, JP;
Motohide Mori, Toyota, JP;
Kazutaka Ogo, Aichi-gun, JP;
Kunio Naito, Aichi-gun, JP;
Sanyo Special Steel Co., Ltd., Himeji-shi, JP;
Abstract
A lead-free steel for machine structural use with excellent machinability and low strength an isotropy, which does not contain Pb and is equal to or higher than a conventional D Pb-containing free cutting steel in properties, is provided. This steel includes, on the weight basis, C: 0.10 to 0.65%; Si: 0.03 to 1.00%; Mn: 0.30 to 2.50%; S: 0.03 to 0.35%; Cr: 0.1 to 2.0%; Al: less than 0.010%; Ca: 0.0005 to 0.020%; Mg: 0.0003 to 0.020%; 0: less than 20 ppm; and the balance being Fe and inevitable impurities.