Aluminium / Aluminum Bronze UNS C64200 – Copper Alloy

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Welding
     Forging
     Hot Working
     Cold Working
     Annealing
Applications

Introduction

UNS C64200 aluminium / aluminum bronze is a copper alloy with a combination of 5 – 12%. In addition to aluminium, iron, nickel, manganese and silicon in cast and wrought form are present in the alloy.

A hard, adherent, protective alumina film present in this alloy makes the alloy better resistant to corrosion and stronger than typical brasses and tin bronzes. UNS C64200 comes in an attractive golden color which does not tarnish much with time.

Chemical Composition

The following table shows the chemical composition of UNS C64200 copper alloys.

Element Content (%)
Cu 91.2
Al 7.0

Physical Properties

The following table gives the physical properties of UNS C64200 copper alloys.

Properties Metric Imperial
Density 8.8-8.94(g/cm3) 0.32(lb/in3)
Melting point 982°C 1800°F

Mechanical Properties

The mechanical properties of UNS C64200 copper alloys are tabulated below.

Properties Metric Imperial
Poisson's ratio 0.34 0.34
Elastic modulus 16000 GPa 16969 ksi

Other Designations

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Other designations that are equivalent to UNS C64200 copper alloys include:

  • UNS C64200
  • ASME SB150
  • ASME SB283
  • ASTM B124
  • ASTM B150
  • ASTM B283
  • ASTM F467
  • ASTM F468
  • SAE J461
  • SAE J463

Fabrication and Heat Treatment

Machinability

The machinability rating of UNS C64200 alloy is 60%.

Welding

The following are the recommendations of UNS C64200 welding:

  • Soldering - not recommended
  • Brazing - fair
  • Oxyacetylene welding - not recommended
  • Gas shielded arc welding is rated – fair
  • Coated metal arc welding is rated – fair
  • Spot welding is rated – fair
  • Seam welding is rated – fair
  • Butt welding is rated -fair

Forging

The hot forgeability rating of UNS C64200 is 80%. The hot working temperature for this alloy is between 1300 and 1600ºF.

Hot Working

UNS C64200 copper alloys have excellent hot working property.

Cold Working

UNS C64200 copper alloys have poor cold working property.

Annealing

Annealing of UNS C64200 is performed between 1100 and 1300ºF.

Applications

The following are the major applications of UNS C64200 copper alloys:

  • Valve and pump components for industrial process streams
  • Marine equipment
  • High strength fasteners
  • Pole line hardware

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