Patent ID: 9671182
Date: 2017-06-06
CPC Classifications: C22C,F28F

Claim:
1. A copper alloy tube for a heat exchanger having a fracture strength of at least 42 MPa, wherein the copper alloy tube comprises Sn:0.1 to 3.0% by mass and P:0.005 to 0.1% by mass, the remainder has a composition made from Cu and inevitable impurities, the average crystal grain size is 30 μm or less, and the longitudinal tensile strength of the tube is 250 MPa or more, and wherein the copper alloy tube comprises: a texture whose orientation distribution density in the Goss orientation is 4% or less, and wherein the proportion of the low-angle grain boundaries of the inclination angle 5 to 15° in the texture of the copper alloy tube is 1% or more.