ASTM B111 C68700 Aluminum Brass Overview

ASTM B111 Copper Tube PDF

Copper (Cu) content is 76.0%-79.0%. Copper is the primary component of the alloy and plays a significant role in the material's electrical and thermal conductivity, as well as its basic strength.
Zinc (Zn) forms the remainder, forming an alloy with copper to further enhance the material's toughness and machinability.
Aluminum (Al) content is 1.8%-2.5%. The addition of aluminum improves the material's hardness and corrosion resistance.
A small amount of lead (Pb), ≤0.07%, can improve the material's machinability to a certain extent, but excessive lead content can adversely affect its mechanical properties. Iron (Fe) content is ≤0.06%, and arsenic (As) content is 0.02%-0.06%.

We successfully supplied ASTM B111 C68700 aluminum brass tubes to a customer in India for shell & tube condenser applications. During the project, the customer visited our facility for production inspection and quality verification. All tubes were manufactured in accordance with ASTM B111 requirements and delivered with complete Material Test Certificates (MTC), ensuring full heat number traceability and verified chemical and mechanical properties.

Download ASTM B111 C68700 MTC (PDF)

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Good corrosion resistance: Excellent resistance to corrosive media such as seawater, saline solutions, and acid solutions. In a seawater environment, a dense protective oxide layer forms on the material's surface, effectively resisting corrosion from the seawater. This makes it suitable for use in desalination plants, heat exchangers and condensers on offshore platforms, and submarine pipelines.
High Strength: High tensile strength provides excellent load-bearing capacity, making it suitable for applications subject to certain pressures and loads.
Excellent Processability: Easy to cold-work, it can be formed into various shapes, such as straight and curved, to meet the needs of diverse applications.
Excellent Thermal and Electrical Conductivity: This makes it promising for use in equipment requiring these properties, such as heat exchangers and condensers.

Primarily used in the manufacture of pipe fittings for condensers, evaporators, and heat exchangers, it can also be used in distillation piping, among other applications.

In summary, ASTM B111 C68700 aluminum brass tubing is a high-performance material with a wide range of applications in the chemical, refrigeration, and marine engineering sectors.

Although both C68700 and C44300 are widely used for condenser and heat exchanger tubes, they are designed for different cooling water conditions.

How to Choose Between C68700 and C44300

If the cooling medium contains seawater or high chloride levels, C68700 is generally the better choice. For clean freshwater cooling systems where cost is an important factor, C44300 provides reliable performance.

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Inspection Equipment of C68700 Heat Exchanger Tube

All products can be supplied with complete inspection reports and EN 10204 3.1 Mill Test Certificates.

Standard Packaging of C68700 Seamless Tube

To protect the tubes during international transportation, all products are packed according to export standards.

Production Lead Time

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Professional copper pipe supplier

 

As a professional enterprise dedicated to global copper product trade since 2008, GNEE Metal Group deeply recognizes the quality and responsibility embodied in the ASTM B111 standard. This standard not only specifies chemical composition and mechanical properties but also represents a comprehensive quality commitment spanning manufacturing processes to testing and verification. GNEE solemnly assures global customers that every ASTM B111-standard condenser tube and copper alloy tubing we supply will strictly adhere to its requirements for seamless manufacturing, annealing treatment, eddy current testing, and various mechanical performance tests. 

 

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All ASTM B111 C68700 aluminum brass tubes can be supplied with SGS inspection reports, EN 10204 3.1 Mill Test Certificates, and other required quality documents. Third-party inspections by SGS, BV, TÜV, or Intertek are available before shipment upon customer request.

1. What is ASTM B111 C68700 aluminum brass tube?

ASTM B111 C68700 is a seamless aluminum brass tube widely used in condensers, heat exchangers, and seawater cooling systems due to its excellent corrosion resistance and thermal conductivity.

2. What are the main applications of C68700 tubes?

C68700 tubes are commonly used in power plants, marine engineering, offshore platforms, desalination plants, petrochemical equipment, and industrial heat exchangers.

3. Is C68700 suitable for seawater service?

Yes. C68700 offers excellent resistance to seawater corrosion, impingement attack, and erosion, making it one of the most widely used materials for seawater condenser tubes.

4. What standard does C68700 comply with?

C68700 tubes are commonly manufactured according to ASTM B111 and ASME SB111 specifications.

5. What sizes can you supply?

We manufacture a wide range of outside diameters, wall thicknesses, and lengths, and we also support fully customized dimensions.

6. Can you provide U-bend tubes?

Yes. U-bend processing is available according to customer drawings and project requirements.

7. What inspection documents are provided?

We can provide EN 10204 3.1 Mill Test Certificates, chemical composition reports, mechanical property reports, dimensional inspection reports, and third-party inspection reports.