C68700 Aluminum Brass
UNS CDA101, ASTM B187, ASTM B152, CuZn20Al2As
The C68700 Aluminum Brass contains small amount of arsenic and can also be added as inhibitor against dezincification. The aluminum brass is mainly used while manufacturing the condensor tubes as these stops the action causes by brackish water and high velocity salts. The metal alloy is resistant to impingement attack and the tubes are also recommended for using in power stations.
Typical Uses for C68700 Aluminum Brass "Arsenical" :
Industrial: Condenser Tube, Evaporator Tubes, Ferrules, Distiller Tubes, Heat Exchanger Tubes
Equivalent Specifications: | |
Specifications | Designation |
ISO | Cuzn20al2 |
Europen | Cuzn20al2 |
Bs | Cz 110 |
Jis | C6870 |
Russian | Lams77-2-0.05 |
Chemical Composition: | ||||||
| Al | As | Cu | Fe | Pb | Zn |
Min/Max | 1.8 - 2.5 | 0.02 - 0.06 | 76.0 - 79.0 | 0.06 | 0.07 | Rem |
Nominals | 2 | 0.04 | 77.5 | - | - | 20.5 |
Specifications: | |
End Product | Specification |
Tube, Condenser | ASME SB111, ASTM B111 |
Tube, Finned | ASME SB359, ASTM B359 |
Tube, Finned | ASME SB543, ASTM B543 |
Tube, U-bend | ASME SB395, ASTM B395 |
Fabrication: | |
Joining Technique | Suitability |
Brazing | Good |
Butt Weld | Good |
Capacity for Being Cold Worked | Excellent |
Capacity for Being Hot Formed | Fair |
Coated Metal Arc Welding | Not Recommended |
Gas Shielded Arc Welding | Fair |
Machinability Rating | 30 |
Oxyacetylene Welding | Fair |
Seam Weld | Fair |
Soldering | Fair |
Spot Weld | Good |
Physical Properties: | ||
Product Property | US Customary | Metric |
Coefficient of Thermal Expansion | 10.3 ·10-6 per oF (68-572 F) | 18.5 ·10-6 per oC (20-300 C) |
Density | 0.301 lb/in3 at 68 F | 8.33 gm/cm3 @ 20 C |
Electrical Conductivity | 23 %IACS @ 68 F | 0.135 MegaSiemens/cm @ 20 C |
Electrical Resistivity | 45.1 ohms-cmil/ft @ 68 F | 7.5 microhm-cm @ 20 C |
Melting Point - Liquidus | 1780 F | 971 C |
Melting Point - Solidus | 1710 F | 932 C |
Modulas of Elasticity in Tension | 16000 ksi | 110000 MPa |
Modulus of Rigidity | 6000 ksi | 41370 MPa |
Specific Gravity | 8.33 | 8.33 |
Specific Heat Capacity | 0.09 Btu/lb/oF at 68 F | 377.1 J/kg/ · oK at 293 K |
Thermal Conductivity | 58.0 Btu · ft/(hr · ft2·oF)at 68F | 100.4 W/m · oK at 20 C |
Sizes Available | |
HOLLOW RODS | Min Bore Size 20 mm and Max OD 100 mm |
ROUND RODS | 6mm To 130 mm |
HEX | 5mm To 60mm |
SQUARE | 4mm To 60mm |
FLAT | 5mm Min Thickness and max Width 120mm |
PROFILES / SECTIONS | AS per Customer Drawing |
BILLETS | Up to 200mm |
INGOTS | AS per Specification |
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