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:
Jun. 06, 2017
Filed:
Oct. 20, 2008
Toshiaki Takagi, Kobe, JP;
Yasuhiro Aruga, Kobe, JP;
Mamoru Nagao, Kobe, JP;
Takashi Shirai, Tokyo, JP;
Masato Watanabe, Tokyo, JP;
Akihiko Ishibashi, Tokyo, JP;
Toshiaki Takagi, Kobe, JP;
Yasuhiro Aruga, Kobe, JP;
Mamoru Nagao, Kobe, JP;
Takashi Shirai, Tokyo, JP;
Masato Watanabe, Tokyo, JP;
Akihiko Ishibashi, Tokyo, JP;
KOBELCO & MATERIALS COPPER TUBE, LTD., Tokyo, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
The present invention provides a copper alloy tube for heat exchangers which is tolerable to a high operating pressure of new cooling media such as carbon dioxide and HFC-based fluorocarbons, and is excellent in fracture strength, even if the tube is thinned, and a copper alloy tube for a heat exchanger which has a composition having specified amounts of Sn and P, has an average crystal grain size of 30 μm or less and has a high strength of 250 MPa or more of a tensile strength in the longitudinal direction of the tube improves the fracture strength as a texture in which the orientation distribution density in the Goss orientation is 4% or less.