Aluminum Brass tubes – C68700 

Resists the action of high-velocity salt and blackish water and is commonly used for condenser tubes. The main characteristic of C68700 is its high resistance to impingement attack. Tubes of this alloys are recommended for use in Marine and Land Power Stations, in which cooling water velocities are high.
It represents the best option for any heat exchanger which is involved with saline water. The additional arsenic has solved the problem of dezincification.

Related material grades in different standards: EN12451 CuZn20Al2As(CW706R),DIN17660/1785 CuZn20Al2,BS2871 CZ110,JIS H3300 C6870,GB/T8890 HAl77-2.

Properties Metric Imperial
Density 8.33 g/cc 0.301 lb/in³
CTE, linear 18.5 10-6/°C @ 20.0 – 300 °C 10.3 10-6/°F @ 70.0 – 570 °F
Specific Heat Capacity 0.09 cal/g-°C @ 20ºC 0.09 BTU/lb-°F @ 70ºF
Thermal Conductivity 100.4 W/m-K @ 20.0 °C 58 BTU/ft2/ft/h/°F @ 70.0 °F
Melting Point 932 ~ 971 °C 1710 ~ 1780 °F

Theoretical Weight Calculation:

Average Wall: (OD-WnxWT x00265- kg/m (all sizes in mm)

Minimum Wall:(OD-WT)x 0.0275-Kg/m (all sizes in mm)

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