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C68700 Aluminum Brass

C68700 Aluminum Brass
C68700 Aluminum Brass
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Product Code : 04
Product Description
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:
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

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

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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