Admiralty Brass Tubes :
Has good corrosion resistance and is specially used for tubing of steam condensers cooled with fresh, salt or brackish water. Admiralty metal tubes are also used for heat exchangers in oil refineries, in which corrosion from sulfur compounds and contaminated water may be very severe, and for feed-water heaters and heat-exchanger equipment as well as other industrial processes.
| UNS No. |
C44300 – BSI No. CZ111 ISO Name CuZn28Sn1 |
| Chemical Comp. (%) |
Cu 70 ~ 73 / Sn 0.9 ~ 1.2 / 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 |
Admiralty Brass Tubes Specification:
| Properties * |
Metric |
English |
| Density |
8.53 g/cc |
0.308 lb/in³ |
| Tensile Strength, min. |
310 MPa |
45 ksi |
| Yield Strength, min. |
105 MPa |
15 ksi |
| CTE, linear |
20.2 10-6/°C @ 20.0 – 300 °C |
11.2 10-6/°F @ 70.0 – 570 °F |
| Specific Heat Capacity |
0.09 cal/g-°C @ 20ºC |
0.09 BTU/lb-°F @ 70ºF |
| Thermal Conductivity |
109 W/m-K @ 20.0 °C |
64 BTU/ft2/ft/h/°F @ 70.0 °F |
| Melting Point |
899 ~ 938 °C |
1650 ~ 1720 °F |
Admiralty Brass Pipes:
| Technique |
Symbol |
Cu |
Sn |
Pb |
Ni |
Fe |
Zn |
As |
Condition |
| Cutting Edge |
CZ 111 |
70.0-73.0 |
1.0-1.5 |
0.07 |
- |
0.06 |
REM'DER |
0.02-0.06 |
- |