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C64200 Aluminum Bronze


C64200 is an engineering alloy at least as resistant to corrosion as copper itself, but much stronger. C642 is manufactured mostly in the form of round, hexagonal, and octagonal rods for hot forming and free machining. C64200 is considered to be one of the best valve stem alloys. Other applications include gears, marine hardware, nuts, pole line hardware, and valve bodies and components.


Typical Applications

Automotive

Valve Guides, Automobile Engine

Electrical

Pole Line Hardware

Fasteners

Bolts, Nuts

Industrial

Valve Components, Valve Bodies, Gears, Valve Stems, Cams

Marine

Hardware


Chemical Composition

Cu%Sn%Pb%Zn%Fe%Ni%Sb%P%S%AI%Mn%Si%

Rem.

0.20

0.05 

0.50

0.30

0.25

N/A

N/A

N/A
6.30-
7.60

0.10
1.50-
2.20

Mechanical Properties

Mechanical - HR50 Drawn and Stress Relieved Temper:  Under 1/2” Bars and Rods inclusive
Tensile Strength, min90 ksi621 MPa
Yield Strength @ .5% ext under load min45 ksi310 MPa
Elongation in 2 in. or 50 mm min, %9
Brinell HardnessN/A
Machinability Rating60%
Mechanical - HR50 Drawn and Stress Relieved Temper: 1/2” to 1” Bars and Rods inclusive 
Tensile Strength, min85 ksi586 MPa
Yield Strength @ .5% ext under load min45 ksi310 MPa
Elongation in 2 in. or 50 mm min, %12
Brinell Hardness, minN/A
Machinability Rating60%
Mechanical - HR50 Drawn and Stress Relieved Temper: over 1” to 2” Bars and Rods inclusive  
Tensile Strength, min85 ksi550 MPa
Yield Strength @ .5% ext under load min42 ksi290 MPa
Elongation in 2 in. or 50 mm min, %12
Brinell Hardness, minN/A
Machinability Rating60%
Mechanical - HR50 Drawn and Stress Relieved Temper: over 2” to 3” Bars and Rods inclusive 
Tensile Strength, min75 ksi517 MPa
Yield Strength @ .5% ext under load min35 ksi241 MPa
Elongation in 2 in. or 50 mm min, %15
Brinell Hardness, minN/A
Machinability Rating60%

Physical Properties

 US CustomaryMetric
Melting Point-Liquidus1840 °F
1004 °C
Melting Point-Solidus1800 °F
982 °C
Density0.278 lb/in 3
@ 68 °F
7.69 gm/cm 3
@ 20 °C
Specific Gravity7.697.69
Electrical Resistivity113 ohms-cmil/ft
@ 68 °F
18.79 microhm-cm
@ 20 °
Electrical Conductivity8% IACS
@ 68 °F
0.047  MegaSiemens/cm
@ 20 °C
Thermal Conductivity26 Btu/sq ft/ft hr/°F
@ 68 °F
45 W/m
@ 20 °C
Coefficient of
Thermal Expansion
10  ⋅ 10-6 per °F
(68-572 °F)
17.3 ⋅ 10-6 per °C
(20-300 °C)
Specific Heat Capacity0.09 Btu/lb/°F
@ 68 °F
377.1 J/kg
@ 20 °C
Modulus of Elasticity
in Tension
16000 ksi110317 MPa
Magnetic Permeability6000 ksi
41369 MPa

Fabrication Properties

Joining TechniqueSuitability
SolderingNot Recommended
BrazingFair
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingFair
Coated Metal Arc WeldingFair
Spot WeldFair
Butt WeldFair
Capacity for being Cold WorkedPoor
Capacity for being Hot FormedExcellent
Forgeability Rating80

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