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UNS/CDA
C61000
ALUMINUM BRONZE A1
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Specifications
AWS A5.7 Class
ERCuAl-A1
ASME SFA5.7 ERCuAl-A1
QQ-C-450
Description
Aluminum Bronze A1 is an iron-free aluminum bronze filler
metal used for MIG and TIG overlay welding of bearing
and wear resistant surfaces exposed to corrosive environments
such as salt or brackish water and commonly used acids.
Aluminum Bronze A-1 is not recommended for joining.
Commonly used in steel and pulp mills to overlay tube
sheets, valve seats and refineries.
Chemical Composition
(%max., unless shown as range or min.)
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Cu(1)
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Al
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Fe
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Pb
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Si
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Zn
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Min./Max.
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Rem.
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6.0-8.5
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.50
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.02
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.10
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.20
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Nominal
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92.0
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8.0
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-
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-
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-
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-
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(1) Cu value includes Ag.
Note: Cu + Sum of
Named Elements, 99.5% min.
Applicable Specifications
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Product
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Specification
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Bar
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FEDERAL QQ-C-450
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Electrode, Welding
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AWS A5.7
MILITARY MIL-E-23765/3
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Plate
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FEDERAL QQ-C-450
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Sheet
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FEDERAL QQ-C-450
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Strip
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FEDERAL QQ-C-450
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Common Fabrication
Processes
Blanking, Drawing, Forming
and Bending, Heading and Roll Threading
Fabrication Properties
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Joining Technique
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Suitability
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Soldering
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Fair
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Brazing
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Not Recommended
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Oxyacetylene Welding
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Not Recommended
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Gas Shielded Arc Welding
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Good
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Coated Metal Arc Welding
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Good
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Spot Weld
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Good
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Seam Weld
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Fair
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Butt Weld
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Good
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Capacity for Being Cold Worked
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Good
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Capacity for Being Hot Formed
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Good
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Forgeability Rating
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70
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Machinability Rating
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20
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Physical Properties
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US Customary
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Metric
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Melting Point - Liquidus
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1905 F
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1041 C
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Density
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0.281 lb/in3
at 68 F
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7.78 gm/cm3
@ 20 C
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Specific Gravity
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7.78
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7.78
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Electrical Resistivity
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69.2 ohms-cmil/ft @ 68 F
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11.5 microhm-cm @ 20 C
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Electrical Conductivity
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15 %IACS @ 68 F
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0.088 MegaSiemens/cm @ 20 C
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Thermal Conductivity
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40.0 Btu ·ft/(hr ft2·oF)at
68F
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69.2 W/m · o
K
at 20 C
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Coefficient of Thermal
Expansion
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9.9 ·10-6
per o
F (68-572 F)
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17.8 ·10-6
per
o
C (20-300 C)
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Specific Heat Capacity
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0.09 Btu/lb/o
F at 68
F
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377.1 J/kg · o
K at 293 K
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Modulas of Elasticity
in Tension
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17000 ksi
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117000 MPa
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Modulus of Rigidity
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6400 ksi
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44130 MPa
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Tempers Most Commonly
Used
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Flat Products
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BAR, ROLLED
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H04, O60
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PLATE
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H04, O60
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SHEET
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H04, O60
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STRIP, ROLLED
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H04, O60
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Typical Uses
Architecture
Decorative Applications
Fasteners
Bolts
Industrial
Welding Wire, Pump Parts, Tie Rods, Shafts,
Overlay on Steel for Wearing Surface
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