Aluminum Silicon Bronze C642 Round Bar
Farmer’s Copper inventories Aluminum Silicon Bronze C64200 round rod. This copper alloy is non-magnetic, has good fatigue, wear and corrosion resistant, and is anti-galling. Copper alloy 642 has the highest machinability rating of bronzes and brasses without the addition of lead. It has excellent hot workability and can be used for hot forging.
Farmer’s Copper continues to serve the metal industry as it has for over 90 years. Contact one of our experienced sales representatives today to inquire about all of your C642 needs.
Aluminum Silicon Bronze C642 Round Bar Applications
- Fasteners
- Pickling equipment
- Valve stems
- Aircraft bushings
Industries
Farmer’s Copper Ltd. extends its services throughout many industries. We provide the raw copper alloy materials in various standard shapes as well as custom cut copper alloys.
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Standard Sizes
Round bar – ½” Dia. thru 6”
Fabrication Properties
| Joining 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 |
Physical Properties
| Melting Point – Liquidus ⁰F | 1981 | |
| Melting Point – Solidus ⁰F | 1949 | |
| Density lb/cu in. at 68⁰F | 0.322(1) | |
| Specific Gravity | 8.91 | |
| Electrical Conductivity % IACS at 68⁰F | 101(2) | |
| Thermal Conductivity Btu/sq ft/ft hr/ ⁰F at 68⁰F | 226 | |
| Coefficient of Thermal Expansion 10-6 per ⁰F (68-212 ⁰F) | 9.4 | |
| Coefficient of Thermal Expansion 10-6 per ⁰F (68-392 ⁰F) | 9.6 | |
| Coefficient of Thermal Expansion 10-6 per ⁰F (68-572 ⁰F) | 9.8 | |
| Specific Heat Capacity Btu/lb/⁰F @ 68 ⁰F | 0.092 | |
| Modulus of Elasticity in Tension ksi | 17000 | |
| Modulus of Rigidity ksi | 6400 |
- ASTM Standard Designation for C64200: ASTM B150
- AMS Standard Designation for C64200: AMS 4631c
- Federal Specifications for C64200: QQ-C-465
Chemical Composition
| Cu(1) | Al | As | Fe | Pb | Mn | Ni(2) | Si | Sn | Zn | |
| Min./Max. | Rem. | 6.3-7.6 | 0.09 | 0.3 | 0.05 | 0.1 | 0.25 | 1.5-2.2 | 0.2 | 0.5 |
| Nominal | 91.2 | 7 | - | - | - | - | - | 1.8 | - | - |
Our Commitment to Service
As a leading copper, brass, & bronze alloys supplier, Farmers Copper Ltd. attributes our success to serving our customers, through our service-minded employees and material readily available for prompt, accurate deliveries of copper, brass, bronze, stainless steel and other metal alloys.