Astm B111 C68700 Aluminium Brass Tubes

Astm B111 C68700 Aluminium Brass Tubes

Aluminium Brass Tubes / Astm B111 C 68700 Aluminium Brass Tubes

ASTM B111 C68700 is a specialized copper-zinc-aluminum alloy primarily designed for seamless condenser tubes and heat exchanger components. Commonly known as Aluminum Brass, this grade is engineered for high resistance to corrosion and biofouling in harsh marine and industrial environments.

  • Description
  • Chemical Composition
  • Physical Properties
  • Sizes Available

A Copper Zinc Alloy containing Aluminum and small amount of Arsenic 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 condensor tubes. The outstanding characteristics of aluminum brass is the high resistance to impingement attack. Tubes of this alloy are recommended for use in marine and land power stations where cooling water velocities are high and where inhibited admiralty brass has failed from impingement.

Typical Applications:

  • Condenser Tube, Evaporator Tubes, Ferrules, Distiller Tubes, Heat Exchanger Tubes


 

Equivalent Specifications

SPECIFICATIONSDESIGNATION
ISOCuZn20Al2
EuropenCuZn20Al2
BSCZ 110
JISC6870
RussianLAMs77-2-0.05

Chemical Composition

 AlAsCuFePbZn
Min/Max1.8 - 2.50.02 - 0.0676.0 - 79.00.060.07Rem
Nominals2.00000.040077.5000--20.5000

Physical Properties

Coefficient of Thermal Expansion10.3 10−6Per °F (68-572 F)
Density0.301 lb/in3 at 68 F
Electrical Conductivity23 %IACS @ 68 F
Electrical Resistivity45.1 ohms-cmil/ft @ 68 F
Melting Point Liquid US1780 F
Melting Point Solid US1710 F
Modulas of Elasticity in Tension16000 ksi
Modulas of Rigidity6000 ksi
Specific Gravity8.33
Specific Heat Capacity0.09 Btu/lb/°F @ 68 F
Thermal Conductivity58.0 BTU in/hr.ft2.°F @ 68 F

Sizes Available

HOLLOW RODSMin Bore Size 20 mm and Max OD 100 mm
ROUND RODS/RODS6mm To 130 mm
HEX5mm To 60mm
SQUARE4mm To 60mm
FLAT5mm Min Thickness and max Width 120mm
PROFILES / SECTIONSAS per Customer Drawing
BILLETSUp to 200 mm
INGOTSAS per Specification
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