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C63020 Nickel Aluminum Bronze


Aluminum is the main alloying metal added to copper in aluminum bronze. A variety of aluminum bronzes of differing compositions have found industrial use, with most ranging from 5.00% to 11.00% aluminum by weight, the remaining mass being copper. Other alloying agents such as iron, nickel, manganese, and silicon are also oftentimes added. Aluminum bronzes are most valued for their high strength and corrosion resistance.


Typical Applications

Aerospace

bushings, bearings

Industrial

bearings, forming dies for roll bearings, hydraulic bushings for earth moving equipment, valve balls, valve parts (cryogenic).


Chemical Composition

Cu%Sn%Pb%Zn%Fe%Ni%Co%Cr%S%AI%Mn%Si%

Rem.

0.25

0.03  

0.30
4.00-
5.50
4.20-
6.00

0.20 

0.05 

N/A
10.00-
11.00

1.50

0.15

Mechanical Properties

Mechanical - TQ50 Quenched and Tempered : upto 1" diameter inclusive
Tensile Strength, min135 ksi931 MPa
Yield Strength @ .5% ext under load min100 ksi689 MPa
Elongation in 2 in. or 50 mm min, %6
Brinell HardnessN/A
Machinability RatingN/A
Mechanical - TQ50 Quenched and Tempered : over 1” to 2”  inclusive   
Tensile Strength, min130 ksi896 MPa
Yield Strength @ .5% ext under load min95 ksi655 MPa
Elongation in 2 in. or 50 mm min, %6
Brinell Hardness, minN/A
Machinability RatingN/A
Mechanical - TQ50 Quenched and Tempered : over 2” to 4”  inclusive  
Tensile Strength, min130 ksi896 MPa
Yield Strength @ .5% ext under load min90 ksi621 MPa
Elongation in 2 in. or 50 mm min, %6
Brinell Hardness, minN/A
Machinability RatingN/A

Physical Properties

 US CustomaryMetric
Melting Point-Liquidus1940° to 1967 °F
1060° to 1075 °C
Melting Point-SolidusN/AN/A
Density0.274 lb/in 3
@ 68 °F
7.6 gm/cm 3
@ 20 °C
Specific Gravity7.67.6
Electrical Resistivity132.33 ohms-cmil/ft
@ 68 °F
22.0 microhm-cm
@ 20 °C
Electrical ConductivityN/AN/A
Thermal Conductivity31.2 Btu/sq ft/ft hr/°F
@ 68 °F
54.0 W/m
@ 20 °C
Coefficient of
Thermal Expansion
9.4  ⋅ 10-6 per °F
(68-572 °F)
17.0 ⋅ 10-6 per °C
(20-300 °C)
Specific Heat CapacityN/AN/A
Modulus of Elasticity
in Tension
N/AN/A
Magnetic PermeabilityN/AN/A

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