Cast C64200
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. Aluminum bronzes are most valued for their high strength and corrosion resistance.
Information
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: valve guides (automobile engine)
ELECTRICAL: pole line hardware
Fasteners: bolts, nuts
Industrial: cams, gears, valve bodies, valve components, valve stems
MARINE: hardware
Similar or equivalent specification
| CDA | ASTM | SAE | AMS | Federal | Military | Other |
|---|---|---|---|---|---|---|
| C64200 | B150 B150M | J461 J463 | 4634 | QQ-C-465 |
Chemical composition
| Cu%1 | Pb% | Sn% | Zn% | Fe% | Ni%2 | Al% | Mn% | Si% |
|---|---|---|---|---|---|---|---|---|
| Rem. | 0.05 | 0.20 | 0.50 | 0.30 | 0.25 | 6.30-7.60 | 0.10 | 1.50-2.20 |
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.
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
HR50 Drawn and Stress Relieved Temper
Size Range: Up to 1/2" Bars and Rods Inclusive
| Tensile strength, min | Yield strength, at 0.5% 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 0.5% 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 0.5% 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 0.5% 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
| 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 20 °C |
| Modulus of elastic in tension | 16000 ksi | 110317 MPa |
| Modulus of Rigidity | 6000 ksi | 41369 MPa |
Fabrication properties
| 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
| Treatment | Minimum * | Maximum * |
|---|---|---|
| Annealing | 1100 | 1300 |
| Hot Treatment | 1300 | 1600 |