Fin Material: Copper Sheet per ASTM B 152-current, Standard Specification for Copper Sheet, Strip, Plate and Rolled Bar. UNS No. C11000, ETP (electrolytic tough pitch), H02 (half-hard) temper, having a minimum tensile strength of 42.5 ksi.
Tube Material: Level-Wound Copper Tube per ASTM B 743-current, Standard Specification for Seamless Copper Tube in Coils. UNS No. 12200, DHP (Phosphorized, high residual phosphorus), H58 (drawn, general purpose) temper, full hard alloy.
EMF - Welding: Thermafin's exclusive high frequency forged weld process, utilizes no foreign materials in the weld process and allows for a true, seamless copper to copper connection.
Selective Surfacing: Thermafin's proprietary "Crystal Clear" selective surface coating. A single-phase nonocrystalline technology encapsulated with a permanent protective glass layer serving multiple functions, including anti- reflection, anti-corrosion, and manufacturing durability.
Optical Properties: Absorptivity (a) = 0.96 Emissivity (e) = 0.08