AMS 4634-C64200

 

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Aluminum is the main alloying metal added to copper in aluminum bronze alloys such as C64200, also known as C642. 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. Aluminium bronzes are most valued for their high strength and corrosion resistance.

Info

Product Description: Aluminum Bronze
Tempers: HR50 Drawn and Stress Relieved
Solids: 3/16" to 6" O.D.
Hex: 1/2" to 2" O.D.
Rectangles: Consult Mill
Standard Lengths: 144"

Typical Uses

Automotive: automobile engine valve guides
Electrical: pole line hardware
Fasteners: bolts, nuts
Industrial: cams, gears, valve bodies, valve components, valve stems
Marine: hardware

Similar or Equivalent Specification

CDA ASTM Asarcon SAE AMS Federal Military Other
C64200 B150
B150M
  J461
J463
4634 QQ-C-465B AMD1    

Chemical Composition

Cu%1 Pb% Sn% Zn% Fe% Ni%2 Al% Mn% Si%
Chemical Composition according to AMS 4634

1Cu value includes Ag.    2Ni value includes Co.
Note: Cu + Sum of Named Elements, 99.5% min. Single values represent maximums.
 
Rem.
 
0.05
 
0.20
 
0.50
 
0.30
 
0.25
6.30-
7.60
 
0.10
1.50-
2.20

Machinability

Copper Alloy UNS No. Machinability Rating Density (lb/in3 at 68 °F)
C64200 60 0.278

Mechanical Properties

Mechanical Properties according to AMS 4634

C64200

HR50 Drawn and Stress Relieved Temper

SIZE RANGE: UNDER 1/2" BARS AND RODS INCLUSIVE
Tensile Strength, min Yield Strength, at 00.5% Extension Under Load, min Elongation, in 4D, min Hardness, internal Remarks
ksi MPa ksi MPa % HRB  
90 621 45 310 9 >80 inclusive
SIZE RANGE: 1/2" TO 1" BARS AND RODS INCLUSIVE
Tensile Strength, min Yield Strength, at 00.5% Extension Under Load, min Elongation, in 4D, min Hardness, internal Remarks
ksi MPa ksi MPa % HRB  
85 586 45 310 12 >80 inclusive
SIZE RANGE: OVER 1" TO 2" BARS AND RODS INCLUSIVE
Tensile Strength, min Yield Strength, at 00.5% Extension Under Load, min Elongation, in 4D, min Hardness, internal Remarks
ksi MPa ksi MPa % HRB  
80 552 42 290 12 >80 inclusive
SIZE RANGE: OVER 2" TO 3" BARS AND RODS INCLUSIVE
Tensile Strength, min Yield Strength, at 00.5% Extension Under Load, min Elongation, in 4D, min Hardness, internal Remarks
ksi MPa ksi MPa % HRB  
75 517 35 241 15 >80 inclusive

Physical Properties

Physical Properties provided by CDA

  US Customary Metric
Melting Point - Liquidus 1840 °F 1004 °C
Melting Point - Solidus 1800 °F 982 °C
Density 0.278 lb/in3 at 68 °F 7.69 gm/cm3 at 20 °C
Specific Gravity 7.69 7.69
Electrical Conductivity 8% IACS at 68 °F 0.047 MegaSiemens/cm at 20 °C
Thermal Conductivity 26 Btu/sq ft/ft hr/°F at 68 °F 45 W/m at 20 °C
Coefficient of Thermal Expansion 68-572 10 · 10-6 per °F (68-572 °F) 17.3 · 10-6 per °C (20-300 °C)
Specific Heat Capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 293 °C
Modulus of Elasticity in Tension 16000 ksi 110317 MPa
Modulus of Rigidity 6000 ksi 41369 MPa

Fabrication Properties

Fabrication Properties provided by CDA
Technique Suitability
Soldering Not Recommended
Brazing Fair
Oxyacetylene Welding Not Recommended
Gas Shielded Arc Welding Fair
Coated Metal Arc Welding Fair
Spot Weld Fair
Seam Weld Fair
Butt Weld Fair
Capacity for Being Cold Worked Poor
Capacity for Being Hot Formed Excellent
Forgeability Rating 80
Machinability Rating 60

Thermal Properties

Thermal Properties provided by CDA

*Temperature is measured in Fahrenheit.
Treatment Minimum* Maximum*
Annealing 1100 1300
Hot Treatment 1300 1600

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