Finned Heat Exchanger Tubes: copper, copper-nickel, steel, and stainless steel Casing: aluminum, steel, galvanized steel, etc. Finned Heat ExchangerGeneral Description: • Finned heat exchangers are used in great versatility and applied in most different branches of industry • Can make liquids warm or cold by means of gas (or reversed) • Water, brine, wet steam, hydraulic oil, lubrication oil, ...