Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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Yuhong Group, a top exporter of heat exchanger tubes with over 20 years of experience and a global presence in more than 80 countries, is proud to offer C68700 Copper Alloy Seamless Tubes. Manufactured in accordance with ASTM B111 standards, our tubes are SGS-approved, ensuring the highest level of quality and reliability.
These tubes are specifically designed for demanding heat exchanger applications, offering excellent corrosion resistance, high thermal conductivity, and outstanding durability. With a focus on precision manufacturing, Yuhong's copper alloy tubes are trusted by industries worldwide.
Common Grades of Copper Alloy Heat Exchanger Tubes
| Grade | UNS Number | Composition | Applications |
|---|---|---|---|
| Admiralty Brass | C44300 | Copper, Zinc, Tin | Marine condensers, power plants |
| Aluminum Brass | C68700 | Copper, Aluminum, Zinc | Heat exchangers in seawater environments |
| 90/10 Cu-Ni | C70600 | 90% Copper, 10% Nickel | Desalination plants, shipbuilding |
| 70/30 Cu-Ni | C71500 | 70% Copper, 30% Nickel | High-pressure condensers, offshore platforms |
Among these, C68700 (Aluminum Brass) is particularly favored for its superior corrosion resistance in marine and industrial environments, making it ideal for heat exchangers and condensers exposed to seawater.
Delivery Conditions for Copper Tubes
Our C68700 Copper Alloy Seamless Tubes are available in various delivery conditions to meet diverse industry requirements:
| Condition | Description |
|---|---|
| Hard Drawn (H) | Maximum strength and hardness, suitable for high-pressure applications. |
| Annealed (O) | Softened for improved ductility and ease of bending. |
| Half Hard (HH) | A balance between strength and flexibility. |
| As Manufactured (As-Made) | Standard properties without additional treatments. |
All tubes are inspected and delivered with precise dimensions and surface finishes to ensure seamless integration into your systems.
ASTM B111 Testing and Quality Standards
Our copper alloy tubes are manufactured in strict compliance with ASTM B111 standards, ensuring the highest level of quality and reliability. Key testing and quality requirements include:
Chemical Composition Analysis:
Ensures the correct ratio of copper, aluminum, and zinc for C68700 grade.
Verified using spectrometers for absolute precision.
Mechanical Properties Testing:
Tensile strength, yield strength, and elongation are tested to ensure compliance with ASTM standards.
Typical mechanical properties for C68700:
Tensile Strength: 310–500 MPa
Yield Strength: ≥105 MPa
Elongation: ≥30%
Hydrostatic and Eddy Current Testing:
All tubes undergo hydrostatic tests to ensure no leaks under pressure.
Eddy current testing detects surface and subsurface defects.
Dimensional Inspection:
Outer diameter, wall thickness, and length are measured with tight tolerances to guarantee precision.
Surface Quality:
Tubes are free from defects such as cracks, dents, or deformities, ensuring flawless performance.
Applications of C68700 Copper Alloy Tubes
Thanks to their excellent corrosion resistance, high thermal conductivity, and mechanical strength, C68700 Copper Alloy Tubes are widely used in various industries, including:
Heat Exchangers:
Used in power plants, chemical processing, and petrochemical industries for efficient heat transfer.
Condensers and Evaporators:
Ideal for marine and industrial use, especially in environments with seawater exposure.
Desalination Plants:
Commonly used in desalination systems due to their resistance to seawater corrosion.
Oil and Gas Industry:
Suitable for offshore platforms and refineries where harsh environments demand reliable materials.
HVAC Systems:
Widely applied in heating, ventilation, and air conditioning systems for efficient thermal exchange.
Shipbuilding:
Used in marine condensers, coolers, and piping systems due to superior resistance to biofouling.
Contact us today to learn more about our C68700 Copper Alloy Seamless Tubes or to request a free quote. Let Yuhong Group be your trusted partner for all your heat exchanger needs!
