ASTM B111 C68700 O61 Aluminum Brass Seamless Tubes For Heat Exchangers
Chemical Composition (%) max
| Grade | Copper | Aluminum | Lead | Iron | Zinc | Arsenic |
| C68700 | 76.0-79.0 | 1.8-2.5 | 0.07 | 0.06 | remainder | 0.02-0.06 |
Mechanical Properties
| Grade | Tensile Strength min | Yield Strength min |
| C68700 | 50ksi | 18ksi |
ASME SB111/ASTM B111 This specification establishes requirements for seamless tube and ferrule stock of copper and various copper alloys up to 31 ⁄ 8 in. (80 mm), inclusive, in diameter, for use in surface condensers, evaporators, and heat exchangers. The B111 C68700 copper alloy tube plays a significant role in heat exchangers due to its excellent thermal conductivity, corrosion resistance, and mechanical properties.
Key Features Suitable For Heat Exchangers
Efficient Heat Transfer: Copper alloys, including C68700, have high thermal conductivity, which is crucial for efficient heat transfer in heat exchangers. This property allows for rapid and effective exchange of heat between fluids.
Durability in Harsh Environments: Material C68700, also known as arsenical aluminum brass, contains small amounts of arsenic and aluminum, which enhance its resistance to corrosion, particularly in seawater and other corrosive environments. This makes it suitable for use in marine and industrial heat exchangers.
Resistance to Dezincification: The alloy is specifically designed to resist dezincification, a common form of corrosion in brass alloys, ensuring long-term durability.
Ease of Fabrication: C68700 tubes can be easily fabricated into various shapes and sizes, making them versatile for different heat exchanger designs, U bend tubes is usual.
Low Maintenance: The corrosion resistance and durability of the alloy reduce the need for frequent maintenance, lowering operational costs.
Applications In Heat Exchangers
Marine Heat Exchangers: Due to its excellent resistance to seawater corrosion, C68700 is commonly used in marine heat exchangers, such as those found in ships and offshore platforms.
Industrial Heat Exchangers: Used in industrial applications where heat exchangers are exposed to corrosive fluids or environments.
HVAC Systems: Employed in heating, ventilation, and air conditioning systems for efficient heat exchange.
Anyway, the B111 C68700 copper alloy tube is a critical component in heat exchangers, offering a combination of high thermal conductivity, excellent corrosion resistance, and strong mechanical properties. These advantages make it particularly suitable for demanding environments such as marine and industrial applications, ensuring efficient, durable, and cost-effective heat exchange operations.
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ASTM B111 C68700 O61 Aluminum Brass Seamless Tubes For Heat Exchangers Images
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