Overview
Aluminum Brass Tube is a copper zinc alloy containing aluminum and small amount of arseric which is added as an inhibitor against dezincification. Inhibited Aluminum Brass resists the action of high velocity salt and brackish water and is commonly used for condenser tube. The outstanding characteristic of Aluminum Brass is the high resistance to impringement attack. Aluminum Brass tubes are highly accepted and one of the extensively used material for various industrial applications.
Specification
ASTM B111/B111M Standard Specification for Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock.
| 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 |
Grade of brass tubes
| Grade | USA | U.K | Germany | Japan | ||
| China BG | ASTM | CDA | BS | DIN | No. | JIS H |
| H85 | C23000 | 230 | CZ102 | CuZn15 | 2.024 | C2300 |
| H80 | C24000 | 240 | CZ103 | CuZn20 | 2.025 | C2400 |
| H70 | C26000 | 260 | CZ106 | CuZn30 | 2.0265 | C2600 |
| H68 | C26200 | / | / | CuZn33 | 2.028 | C2680 |
| H65 | C26800 | 268 | CZ107 | CuZn36 | 2.0335 | C2680 |
| H63 | C27400 | 272 | CZ108 | CuZn37 | 2.0321 | C2720 |
Chemical Composition
| Cu | Fe | Pb | Zn | |
| Min./Max. | 62.0-65.0 | 0.07 | 0.07 | Rem. |
| Nominal | 63.5 | - | - | 36.5 |
Mechanical Properties
| Form | Temper | Temper Code | Tensile Strength (ksi) | YS-0.5% Ext (ksi) | Elongation (%) | Rockwell F scale |
| Tube | Nominal Grain Size 0.025 mm | OS025 | 60 Typ | 27 Typ | 55 Typ | 77 Typ |
Applications
1. Sugar Industry
2. Plumbing
3. Furniture
4. Hand Pumps
5. Ammunitions
6. General Engineering
