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.
