KOBELCO & MATERIALS COPPER TUBE, LTD. Patent applications |
Patent application number | Title | Published |
20090116997 | COPPER ALLOY TUBE FOR HEAT EXCHANGERS - A copper alloy tube according to the present invention includes Sn 0.1 to 2.0 mass %, P 0.005 to 0.1 mass %, S 0.005 mass % or less, O 0.005 mass % or less, and H 0.0002 mass % or less, and the remainder has a composition consisting of Cu and unavoidable impurities. And, as is annealed, the copper alloy tube has the following characteristics: a tensile strength in the longitudinal direction of the copper alloy tube is 250 N/mm | 05-07-2009 |
20090101323 | COPPER ALLOY TUBE FOR HEAT EXCHANGER EXCELLENT IN FRACTURE STRENGTH - 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. | 04-23-2009 |