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Aluminum Silicon Bronze C642 Round Bar

Shapes Bronze Bar Aluminum Silicon Bronze C642 Round Bar
Level 4
Good Fatigue
Level 3
Wear and Corrosion Resistant
Level 2
Level 1

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


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 TechniqueSuitability
SolderingNot Recommended
Oxyacetylene WeldingNot Recommended
Gas Shielded Arc WeldingFair
Coated Metal Arc WeldingFair
Spot WeldFair
Seam WeldFair
Butt WeldFair
Capacity for Being Cold WorkedPoor
Capacity for Being Hot FormedExcellent
Forgeability Rating80
Machinability Rating60

Physical Properties

Melting Point – Liquidus ⁰F1981
Melting Point – Solidus ⁰F1949
Density lb/cu in. at 68⁰F0.322(1)
Specific Gravity8.91
Electrical Conductivity % IACS at 68⁰F101(2)
Thermal Conductivity Btu/sq ft/ft hr/ ⁰F at 68⁰F226
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 ⁰F0.092
Modulus of Elasticity in Tension ksi17000
Modulus of Rigidity ksi6400
  • ASTM Standard Designation for C64200: ASTM B150
  • AMS Standard Designation for C64200: AMS 4631c
  • Federal Specifications for C64200: QQ-C-465

Chemical Composition


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.

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