Aluminium Bronze – Copper Alloy UNS C61300

Topics Covered

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

Introduction

The aluminium bronze- copper alloy UNS C61300 has excellent formability. The alumina film present in UNS C61300 offers strength and corrosion resistance. 

The following datasheet provides chemical composition and properties of UNS C61300 copper alloy.

Chemical Composition

The chemical composition of UNS C61300 is given in the following table.

Element Content (%)
Copper, Cu 88.5-91.5
Aluminium, Al 6.0-7.5
Iron, Fe 2.0-3.0
Tin, Sn 0.02-0.05
Manganese, Mn ≤0.1
Zinc, Zn ≤0.05
Lead, Pb ≤0.01
Other ≤0.05 

Physical Properties

The following table details the physical properties of UNS C61300.

Properties Metric Imperial
Density 7.89 g/cc 0.285 lb/in³
Melting point 1040°C 1905°F

Mechanical Properties

The mechanical properties of UNS C61300 copper alloy are shown in the following table.

Properties Metric Imperial
Tensile strength 540 MPa 78300 psi
Yield strength 240 MPa 34800 psi
Elongation at break 35.00% 35.00%
Reduction of area 25.00% 25.00%
Izod impact 54.0 - 66.0 J 39.8 - 48.7 ftlb
Fatigue strength 180 MPa 26100 psi
Shear modulus 44.0 GPa 6380 ksi
Elastic modulus 117 GPa 16969 ksi
Poisson's ratio 0.34 0.34

Thermal properties

The following table discusses the thermal properties of UNS C61300.

Properties Metric Imperial
Thermal expansion co-efficient (@20-300°C/68-572°F) 16.2 µm/m°C 9.00 µin/in°F
Thermal conductivity (@20°C/68°F) 56.5 W/mK 392 BTUin/hr.ft².°F

Other Designations

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Equivalent designations to UNS C61300 copper alloy include:

  • ASTM B111
  • ASTM B150
  • ASTM B169
  • ASTM B171
  • ASTM B315
  • ASTM B432
  • ASTM B608
  • ASTM F467
  • ASTM F468
  • QQ C450
  • UNS C61300

Fabrication and Heat Treatment

Machinability

UNS C61300 copper alloy has a machinability rating of 30.

Welding

The preferred welding techniques for copper alloy UNS C61300 are brazing, gas shielded arc welding, coated metal arc welding, spot welding, seam welding and butt welding. Soldering and oxyacetylene welding are not recommended for this alloy.

Forging

UNS C61300 has a forgeability rating of 50.

Hot Working

Aluminium bronze UNS C61300 has good hot working properties.

Cold Working

UNS C61300 has good cold working characteristics.

Annealing

UNS C61300 can be annealed at temperatures ranging between 606 and 871°C (1125 and 1600°F.

Applications

The applications of UNS C61300 include:

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

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