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C95400 Aluminum Bronze available from Dura-Bar Metal Services. #

Aluminum Bronze C64200

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.

Chemical Composition
Cu% Sn% Pb% Zn% Fe% Ni% AI%
90.5 N/A N/A N/A N/A N/A 7

Typical Uses

Automotive:
Valve Guides, Automobile Engine
Electrical:
Pole Line Hardware
Fasteners:
Bolts, Nuts
Industrial:
Valve Components, Valve Bodies, Gears, Valve Stems, Cams
Marine:
Hardware

Alloy Properties

Tensile Strength, min 90 ksi 621 MPa
Yield Strength @ .5% ext under load min 50 ksi 345 MPa
Elongation in 2 in. or 50 mm min, %   30
Brinell Hardness, min   166
Machinability Rating   60
  US Customary Metric
Melting Point-Liquidus 1840 F
1004 C
Melting Point-Solidus 1800 F 982 C
Density 0.278 lb/in 3
@ 68 F
7.7 gm/cm 3
@ 20 C
Specific Gravity 7.69 7.69
Electrical Resistivity 113.0 ohms-cmil/ft
@ 68 F
18.79microhm-cm
@ 20 C
Electrical Conductivity 8 %IACS
@ 68 F
0.047MegaSiemens/
cm @ 20 C
Thermal Conductivity 26.0 Btu ft/
(hr ft 2 °F) @ 68 F
45.0 W/m °K @ 20 C
Coefficient of
Thermal Expansion
10.0 10 -6 per °F
(68-572 F)
18.0 10 -6 per °C
(20-300 C)
Specific Heat Capacity 0.09  Btu/lb/°F
@ 68 F
377.1 J/kg °K
@ 293 K
Modulus of Elasticity
in Tension
16000 ksi 110000 MPa

Joining Technique Suitability
Soldering Not Recommended
Brazing Fair
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Fair