ASTM B395 Seamless Copper Alloy U-Bend Tube

  • Grade: UNS C44300, C68700, C70400, C70620, C71000, C71500, C71520
  • Outside Diameter (OD) Range: 6.4-152.4mm
  • Wall Thickness (WT) Range: 2.11-11.5mm
  • Shape/Type of Tube: U-Type

Features

ASTM B395 Copper and Copper Alloy U-Bend Seamless Tube for Heat Exchangers and Condensers

Chemical Composition (wt.%)
Alloy (Cu)  (Sn)  (Al) (Ni) + (Co) (Pb) (Fe) (Zn)  (Mn) (As) (Sb) (P)  (Cr)
C44300 70.0-73.0 0.9-1.2 ≤ 0.07 0.4-1.0 Remainder
C68700 76.0-79.0 ≤ 0.07 0.05-0.5 Remainder 0.02-0.35
C70400 95-5 Cu-Ni 4.8-6.2 ≤ 0.05 0.5-1.0 ≤ 1.0 0.02-0.06
C70620 90-10 Cu-Ni 9.0-11.0 ≤ 0.05 1.0-1.8 ≤ 1.0 0.02-0.06
C71000 80-20 Cu-Ni 19.0-23.0 ≤ 0.05 0.05-0.5 ≤ 1.0 0.02-0.06
C71500 70-30 Cu-Ni 29.0-33.0 ≤ 0.05 0.4-1.0 ≤ 1.0 0.02-0.06
C71520 70-30 Cu-Ni 29.0-33.0 ≤ 0.05 0.5-1.0 ≤ 1.0 0.02-0.06

Technical Specifications

Specification Value
Standard ASTM B395 U-Bend Seamless Copper and Copper Alloy Heat Exchanger and Condenser Tubes
Grade C44300 Type B admiralty metal, C44400 Type C admiralty metal, C44500 Type D admiralty metal, C60800 aluminum bronze, C68700 Type B, aluminum brass, C70400 95-5 copper-nickel, C70600 90-10 copper-nickel, C70620 90-10 copper-nickel-(modified for welding), C71000 80-20 copper-nickel, C71500 70-30 copper-nickel, C71520 70-30 copper-nickel-(modified for welding), C72200 copper-nickel
Manufacturing Process Arc-welded
Seam Type Hot working, Cold working
Tube Size Outside Diameter (OD) Range: 6.4-152.4mm, Wall Thickness (WT) Range: 2.11-11.5mm
Length 1000-18000mm
Delivery Condition Annealed, Light drawn, Drawn, Stress-relieved
Inspection Certificate EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection)
 Test Chemical analysis ASTM E255, Tensile test ASTM E8/E8M, Grain Size ASTM E112, Expansion Test, Flattening Test, Residual Stress Test, NDE Test, Hydrostatic Test, Pneumatic Test, Metallographic Examination ASTM E3
Packing

Packed in plywood boxes.

Application

Industrial Processes: Controlling the temperature of fluids or gases is crucial in various industrial applications, such as chemical processing, power plants, and food processing.
Power Generation: Used in power plants to condense steam from turbines. The efficiency of condensing steam directly affects the overall efficiency of the power generation process.
Desalination Plants: These U-tubes are applied in the condensation process of converting seawater into freshwater. The corrosion resistance of copper alloys makes them suitable for dealing with saltwater.
Ship Cooling Systems: These U-tubes are especially important in marine environments, where the cooling systems must withstand corrosive seawater. Copper-nickel alloys, like UNS C70600 (90-10 copper-nickel), are favored for their excellent resistance to seawater corrosion.
Cooling Systems: These U-tubes are used for processing equipment and heat recovery systems to improve energy efficiency.
Condensing Units: These U-tubes condense petroleum product vapours into liquid form. The thermal conductivity of copper alloys aids in the efficient condensation of vapours.
Radiator and Cooling Systems: Though less common than aluminum in modern automotive radiators, copper and copper alloy tubes are used in high-performance vehicles and racing applications for their superior heat transfer capabilities.
Solar Collectors: These U-tubes are used in solar thermal collectors to transfer heat from the sun to water or antifreeze solutions, contributing to water heating and space heating.
Specialty Chemical Processing: The chemical resistance of certain copper alloys makes them suitable for use in systems that recover acids and other corrosive substances.

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