Luvata Oy

Luvata Espoo Oy

Claes Anders Kamf

Edward G Rottmann

Ying Gong

M Parker Finney

Timothy L Goebel

Larz Ignberg

Alloys containing copper, iron, tin and, optionally, phosphorus or copper, zinc, tin and, optionally, phosphorus, which can be used in, for example, a copper alloy tube for heat exchangers that provides excellent fracture strength and processability for reducing the weight of the tube and for use in high pressure applications with cooling media such as carbon dioxide.

Copper alloys and heat exchanger tubes

A process for producing a copper-nickel-silicon alloy having a yield strength above 90 ksi with an electrical conductivity above 50% IACS. The process includes melting and continuously casting raw material to obtain an alloy containing 1-3 wt. % nickel, 0.2 to 0.7 wt. % silicon, remainder copper and unavoidable impurities; cold delivering the alloy to form a cold-rolled alloy, solution annealing the cold-rolled alloy; cold rolling the annealed alloy; and precipitation annealing the cold-rolled annealed alloy at a temperature of 450-500 degrees C. for four to ten hours with a cooling rate of 10-20 degrees C. per hour.

Process for high strength, high conductivity copper alloy of Cu-Ni-Si group

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East Amherst, NY, United States of America

Claes Anders Kamf