US 11,655,530 B2
Copper alloy tube for heat exchanger with excellent thermal conductivity and breaking strength and method of manufacturing the same
Ho Rim Chung, Seoul (KR); Chang Ho Oh, Gunsan-si (KR); Dae Kyong Kim, Gwangju (KR); Do Young Chung, Hwaseong-si (KR); Do Youl Lee, Seongnam-si (KR); and Dong Jun Kwak, Seoul (KR)
Assigned to LS METAL CO., LTD., Seoul (KR)
Filed by LS METAL CO., LTD., Seoul (KR)
Filed on May 20, 2021, as Appl. No. 17/325,951.
Claims priority of application No. 10-2020-0099118 (KR), filed on Aug. 7, 2020.
Prior Publication US 2022/0042154 A1, Feb. 10, 2022
Int. Cl. C22C 9/02 (2006.01); F28F 21/08 (2006.01); C22F 1/08 (2006.01)
CPC C22F 1/08 (2013.01) [C22C 9/02 (2013.01); F28F 21/085 (2013.01)] 6 Claims
OG exemplary drawing
1. A copper alloy tube for a heat exchanger comprising an oxygen-free copper-tin alloy having: an oxygen (O) content of 5 ppm to up to 9.2 ppm, a composition satisfying the following conditional formulas (1) and (2), and not containing phosphorous, a thermal conductivity of 260 to 350 W/m·k, and an electrical conductivity of 65% IACS or more:
0.3 wt %≤Csn≤0.6 wt %,  (1)
0.01 wt %≤Czn<1.0 wt %,  (2)
wherein Csn represents the content of tin in the oxygen-free copper-tin alloy,
wherein Czn represents the content of zinc in the oxygen-free copper-tin alloy, and
wherein the oxygen-free copper-tin alloy has a texture having a GOSS orientation distribution density of 4.5% or less.