FIELD: power plants, particularly, water turbines and electric power generators. SUBSTANCE: method involves manufacturing of heat exchanger with finned tubes by making one part from aluminum and other part from ferrite material; cladding aluminum surface to be soldered; applying aluminum coating onto ferrite material; assembling parts and applying flux; heating assembly to temperature sufficient for at least partial fusing of cladding layer and coating for time interval sufficient for changing coating and cladding layer into ferro-aluminum intermetallic connection; flatting heat exchanger tube and making fin in the form of coil. Steel may be used as ferrite material and aluminum-silicon alloy as cladding layer and coating. EFFECT: increased efficiency and high quality of heat exchanger. 5 cl, 5 tbl
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