CW307G (CA104)

Aluminium Bronze

CW307G (CA104)

CW307G (CA104) is an alloy of copper and aluminium with significant additions of both iron and nickel. This means the material has high strength combined with a good resistance to oxidation and corrosion, especially in marine environments.

TYPICAL USES

  • Hydraulic Bushings for Earth Moving Equipment
  • Corrosion Resistant Articles
  • Bushings
  • Heat Exchanger Flanges
  • Heat Exchanger Headers
  • Tanks
  • Valve Balls
  • Structural Members
  • Pump Shafts
  • Aircraft Parts
  • Valve Guides
  • Plunger Tips
  • Welded Piping Systems
  • Balls
  • Gears
  • Cams
  • Pump Parts
  • Shafting
  • Condenser Tube for Power Stations and Desalting Units
  • Valve Seats

CHEMICAL COMPOSITION

Cu Al Fe Mn Ni Pb Si Sn Zn Others Total
Min/Max Rem 8.5 – 11.0 3.0 – 5.0 1.0 4.0 – 6.0 0.05 0.2 0.1 0.4 0.2

Fabrication Properties

Joining Technique Suitability
Soldering Not Recommended
Brazing Fair
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Good
Coated Metal Arc Welding Good
Spot Weld Good
Seam Weld Good
Butt Weld Good
Capacity for Being Cold Worked Poor
Capacity for Being Hot Formed Good
Forgeability Rating 75
Machinability Rating 30

MECHANICAL PROPERTIES

Material Condition Nominal Diameter or
Width Across-Flats (mm)
From
Up to and including
Tensile Strength Rm N/mm2 min. 0.2% Proof Strength Rp0.2 N/mm2 approx. Elongation A % min. Hardness HB
min.
max.
M 10 80 As Manufactured
R680 10 80 680 (480) 10
H170 10 80 170 210
R740 10 80 740 (530) 8
H200 10 80 200

PHYSICAL PROPERTIES

US Customary Metric
Melting Point – Liquidus 1930 F 1054 C
Melting Point – Solidus 1895 F 1035 C
Density 0.274 lb/in3 at 68 F 7.58 gm/cm3 at 20 C
Specific Gravity 7.58 7.58
Electrical Resistivity 116.0 ohms-cmil/ft at 68 F 19.28 microhm-cm at 20 C
Electrical Conductivity 7 %IACS at 68 F 0.041 MegaSiemens/cm at 20 C
Thermal Conductivity 22.6 Btu • ft/(hr • ft2•°F) at 68 F 39.1 W/m •°K at 20 C
Coefficient of Thermal Expansion 9.0•10-6 per °F (68-572 F) 16.2•10-6 per °C (20-300 C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 F 377.1 J/kg • °K at 20 C
Modulus of Elasticity in Tension 17500 ksi 121000 MPa
Modulus of Rigidity 6400 ksi 44130 MPa
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