C68700 Aluminum Brass

C68700 Aluminum Brass
C68700 Aluminum Brass
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:

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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