UNS/CDA C62400
Aluminum Bronze,11%

 


Specifications

AWS A5.7 Class ERCuAl-A3

Description
  Aluminum Bronze A-3 contains a higher Iron (Fe) content than Aluminum Bronze A-2. The higher Iron content gives A-3 greater strength when joining aluminum bronze castings of similar composition. A-3 is often used for piston overlay and bearing surface applications which require higher strength, while maintaining good ductility.

Chemical Composition
(%max., unless shown as range or min.)

 

Cu(1)

Al

Fe

Mn

Si

Sn

Min./Max.

Rem.

10.0-11.5

2.0-4.5

.30

.25

.20

Nominal

86.0

11.0

3.0

-

-

-

(1) Cu value includes Ag.
Note: Cu + Sum of Named Elements, 99.5% min.

Applicable Specifications

Product

Specification

Forgings

SAE J461, J463

Rod

ASTM B150

Rod, Welding

AWS A5.7

 

Common Fabrication Processes
Hot bending, Hot forging

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

Excellent

Forgeability Rating

80

Machinability Rating

50

 

Physical Properties

 

US Customary

Metric

Melting Point - Liquidus

1900 F

1038 C

Melting Point - Solidus

1880 F

1027 C

Density

0.269 lb/in3

at 68 F

7.45 gm/cm3

@ 20 C

Specific Gravity

7.45

7.45

Electrical Resistivity

86.4 ohms-cmil/ft @ 68 F

14.36 microhm-cm @ 20 C

Electrical Conductivity

12 %IACS @ 68 F

0.07 MegaSiemens/cm @ 20 C

Thermal Conductivity

34.0 Btu · ft/(hr· ft2·oF)

at 68F

58.8 W/m · o

K at 20 C

Coefficient of Thermal

Expansion

9.0 ·10-6

per o

F (68-572 F)

16.2 ·10-6

per o

C (20-300 C)

Specific Heat Capacity

0.09 Btu/lb/o

F at 68 F

377.1 J/kg · o

K at 293 K

Modulas of Elasticity

in Tension

17000 ksi

117000 MPa

Modulus of Rigidity

6400 ksi

44130 MPa


Typical Uses

Fasteners
Nuts
Industrial
Hydraulic Bushings, Support Bushings, Valve Balls, Welding Wire, Tie Rods, Wear Plates, Drift Pins, Bushings, Gears, Cams