C68700 Copper Alloy U-Tube For Chillers HVAC Systems Seamless
C68700 Copper Alloy U-Tube For Chillers HVAC Systems Seamless
Overview
C68700 is a type of brass alloy that is commonly used in the manufacturing of tubes. A C68700 seamless tube refers to a tube that is made from this specific alloy without any welded seams along its length. Seamless tubes are manufactured by piercing a solid billet of metal and then drawing it through a series of dies to achieve the desired dimensions and shape.
C68700 seamless tubes are known for their uniformity and consistency in wall thickness, as well as their high strength and corrosion resistance properties. These tubes are commonly used in various applications such as heat exchangers, condensers, and plumbing systems where a smooth inner surface and leak-proof characteristics are essential. The seamless construction of these tubes also helps to prevent weak points that could be prone to failure under high-pressure or high-temperature conditions.
Features of C68700
- 1. Corrosion resistance: C68700 has good resistance to corrosion in various environments, including seawater, making it suitable for marine applications.
- 2. Thermal conductivity: C68700 has high thermal conductivity, which makes it an excellent choice for heat exchangers and other applications where efficient heat transfer is required.
- 3. High strength: C68700 has good strength and durability, making it suitable for applications that require a strong material.
- 4. Easy to work with: C68700 is easy to shape, machine, and weld, making it versatile and suitable for a wide range of applications.
- 5. Aesthetically pleasing: C68700 brass alloy has a visually appealing golden color that can enhance the aesthetic appeal of products made from this material.
| C68700 | Elements | |||||
|---|---|---|---|---|---|---|
| Cu(1,2) | Pb | Zn | Fe | Al | As | |
|
(1) Cu value includes Ag.
|
||||||
| Min (%) | 76.0 | 1.8 | 0.02 | |||
| Max (%) | 79.0 | 0.07 | Rem | 0.06 | 2.5 | 0.06 |
| Form | Temper | Temper Code | Tensile Strength (ksi) |
YS-0.5% Ext (ksi) |
Elongation (%) |
Rockwell F scale |
|---|---|---|---|---|---|---|
|
*Measured at room temperature, 68°F (20°C).
|
||||||
| Tube | Nominal Grain Size 0.025 mm | OS025 | 60 Typ | 27 Typ | 55 Typ | 77 Typ |
| Melting Point - Liquidus°F | 1780 |
|---|---|
| Melting Point - Solidus°F | 1710 |
| Densitylb/cu in. at 68°F | 0.301 |
| Specific Gravity | 8.33 |
| Electrical Conductivity% IACS at 68°F | 23 |
| Thermal ConductivityBtu/ sq ft/ ft hr/ °F at 68°F | 58 |
| Coefficient of Thermal Expansion 68-57210 to -6 power per °F (68 – 572°F) | 10.3 |
| Specific Heat CapacityBtu/ lb /°F at 68°F | 0.09 |
|
Modulus of Elasticity in Tensionksi |
16000 |
|
Modulus of Rigidityksi |
6000 |
| Technique | Suitability |
|---|---|
| Soldering | Fair |
| Brazing | Good |
| Oxyacetylene Welding | Fair |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Not Recommended |
| Spot Weld | Good |
| Seam Weld | Fair |
| Butt Weld | Good |
| Capacity for Being Cold Worked | Excellent |
| Capacity for Being Hot Formed | Fair |
| Machinability Rating | 30 |
Applications:
- Condenser and heat-exchangers.
- Water Evaporators.
- Boiler Blowdown Heat Exchangers
- Air coolers.
- Gland Steam Condensers.
- Steam Ejector.
- Turbine Oil Coolers.
- Fuel Oil Heaters.
- Compressed Air Inter and After Coolers.
- Ferrules
- Oil Well Pump Liner
- Distiller
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