C68700 Aluminium Brass Tubes are high-performance copper-zinc alloys that incorporate aluminum to enhance corrosion resistance, especially in marine and industrial environments. Known for their excellent resistance to dezincification, stress corrosion cracking, and impingement attack, these tubes are ideal for handling seawater and other aggressive media.
Thanks to their good thermal conductivity, moderate strength, and excellent formability, C68700 tubes are commonly used in:
Condenser and heat exchanger tubes
Power plants and desalination equipment
Marine hardware and offshore applications
Oil coolers and evaporators
The following are some key deetails of C68700 aluminium brass tubes.
Equivalent Specifications of C68700 Aluminium Brass Tube
|
SPECIFICATIONS
|
DESIGNATION
|
|
ISO
|
CuZn20Al2
|
|
Europen
|
CuZn20Al2
|
|
BS
|
CZ 110
|
|
JIS
|
C6870
|
|
Russian
|
LAMs77-2-0.05
|
|
CATEGORY
|
ASTM
|
BS
|
EN
|
JIS
|
DIN
|
ISO
|
IS
|
|
Aluminum Brass
|
C68700
|
CZ110
|
CW702R
|
H3300(92) C6870 T
|
2.046
|
|
IS 1545 Cuzn21Al2As
|
Chemical Composition
|
|
Al
|
As
|
Cu
|
Fe
|
Pb
|
Zn
|
|
Min/Max
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1.8 - 2.5
|
0.02 - 0.06
|
76.0 - 79.0
|
0.06
|
0.07
|
Rem
|
|
Nominals
|
2.0000
|
0.0400
|
77.5000
|
-
|
-
|
20.5000
|
Physical Properties of C68700 Aluminium Brass Tube
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Coefficient of Thermal Expansion
|
10.3 10−6Per °F (68-572 F)
|
|
Density
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0.301 lb/in3 at 68 F
|
|
Electrical Conductivity
|
23 %IACS @ 68 F
|
|
Electrical Resistivity
|
45.1 ohms-cmil/ft @ 68 F
|
|
Melting Point Liquid US
|
1780 F
|
|
Melting Point Solid US
|
1710 F
|
|
Modulas of Elasticity in Tension
|
16000 ksi
|
|
Modulas of Rigidity
|
6000 ksi
|
|
Specific Gravity
|
8.33
|
|
Specific Heat Capacity
|
0.09 Btu/lb/°F @ 68 F
|
|
Thermal Conductivity
|
58.0 BTU in/hr.ft2.°F @ 68 F
|
Sizes Available in Other Forms
|
HOLLOW RODS
|
Min Bore Size 20 mm and Max OD 100 mm
|
|
ROUND RODS/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
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|
BILLETS
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Up to 200 mm
|
|
INGOTS
|
AS per Specification
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