Inhibited 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.

 

UNS No.	C68700 – BSI No. CZ110 – ISO Name CuZn22AI2
Chemical Comp. (%)	Cu 76 ~ 79 / Al 1.8 ~ 2.5 / Pb 0.07 / Fe 0.06 max / Zn rem / As 0.02 ~ 0.06
ASTM Spec.	B 111, B 395
ASME Spec.	SB 111, SB 395
Applications	Condenser, Evaporator and Heat Exchanger tubes; Distiller tubing.
Temper	O61 Annealed

 

Properties *	Metric	English
Density	8.33 g/cc	0.301 lb/in³
Tensile Strength, min.	345 MPa	50 ksi
Yield Strength, min.	125 MPa	18 ksi
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

 

󰀍select for complete alloy information

C12200 CopperC44300 Admiralty BrassC70600 CuNi 10%C71500 CuNi 30%N04400 NiCu 400

 

 

 

* The information provided in this page includes typical values “only” for general reference and information. It is not intended for specification, design or engineering purposes.