Copper Nickel-Aluminum-Bronze Alloy (UNS C63000)

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

UNS C63000 is a nickel-aluminum-bronze alloy of copper, which has excellent corrosion resistance and hot formability features. The following datasheet will provide more details about copper UNS C63000.

Chemical Composition

The following table shows the chemical composition of copper UNS C63000.

Element Content (%)
Copper, Cu 82
Aluminium, Al 10
Nickel, Ni 5
Iron, Fe 3

Physical Properties

The physical properties of copper UNS C63000 are outlined in the following table.

Properties Metric Imperial
Density 7.58 g/cm³ 0.274 lb/in³
Melting point 1035°C 1895°F

Mechanical Properties

The mechanical properties of copper UNS C63000 are tabulated below.

Properties Metric Imperial
Tensile strength 760 MPa 110000 psi
Yield strength  470 MPa 68200 psi
Elongation at break (in 50 mm, 10% reduction in area) 10% 10%
Elastic modulus 117 GPa 17000 ksi
Poisson’s ratio 0.34 0.34
Reduction of area (at 316°C/601°F, cold finished) 9% 9%
Shear modulus 44.0 GPa 6380 ksi
Fatigue strength (at number of cycles 1.00e+8, reverse bending) 255 MPa 37000 psi
Hardness, Rockwell B 94 94
Machinability (UNS C36000 (free-cutting brass) = 100) 30 30

Thermal Properties

The thermal properties of copper UNS C63000 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (at 20-300°C/68-572°F) 16.2 µm/m°C 9 µin/in°F
Thermal conductivity (at 20°C/68°F) 37.7 W/mK 262 BTU in/hr.ft².°F

Other Designations

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Equivalent materials to copper UNS C63000 are:

  • ASME SB150
  • ASME SB171
  • ASTM B124
  • ASTM B150
  • ASTM B171
  • ASTM B283
  • ASTM F467
  • ASTM F468
  • MIL B-16166
  • QQ C450
  • SAE J461
  • SAE J463. 

Fabrication and Heat Treatment

Machinability

The machinability rate of UNS C63000 is 30.

Welding

Brazing, gas shielded arc welding, coated metal arc welding, spot welding, seam welding, and butt welding are considered as suitable welding processes, whereas processes such as Soldering and oxyacetylene welding are not recommended for UNS C63000 alloy.

Forging

UNS C63000 alloy has a hot forgeability rating of 75 with the recommended hot working temperature ranging between 788 and 927°C (1450 and 1700°F).

Hot Working

The hot working capacity of UNS C63000 is good.

Cold Working

UNS C63000 alloy has poor cold working capacity.

Annealing

The annealing temperature is between and 593 and 704°C (1100 and 1300°F).

Applications

Copper UNS C63000 is used for valve and pump components in industrial process streams. It is also used in marine equipment, high strength fasteners and pole line hardware.

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