Nickel Aluminum Bronze - Copper Casting Alloy UNS C95800

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Heat Treatment


UNS C95800 alloy is a nickel aluminum bronze copper casting alloy. Other types of bronze alloys include phosphor bronze, tin bronze, aluminum bronze, silicon bronze, architectural bronze and manganese bronze.

The datasheet given below provides an overview of UNS C95800 alloy.

Chemical Composition

The chemical composition of UNS C95800 alloy is outlined in the following table.

Element Content (%)
Cu, Copper 79.0
Al, Aluminium/Aluminum 8.50-9.50
Ni, Nickel 3.50-4.50
Mn, Manganese 0.80-1.50
Fe, Iron 0.030

Physical Properties

The following table shows the physical properties of UNS C95800 alloy.

Properties Metric Imperial
Density 7.64 g/cm3 0.276 lb/in³

Mechanical Properties

The mechanical properties of UNS C95800 alloy are displayed in the following table.

Properties Metric Imperial
Hardness, Brinell (3000 kg load; sand cast) 159 159
Hardness, Rockwell B (cast and annealed) 84.0-89.0 84.0-89.0
Hardness, Rockwell B (permanent mold cast) 88 88
Tensile strength (cast and annealed) 585 MPa 84800 psi
Tensile strength (sand cast) 655 MPa 95000 psi
Tensile strength (permanent mold cast) 660 MPa 95700 psi
Yield strength (cast and annealed) 240 MPa 34800 psi
Yield strength (sand cast) 262 MPa 38000 psi
Yield strength (at strain 0.500%/permanent mold cast) 360 MPa 52200 psi
Elongation at break (in 50 mm (2 in.); cast and annealed) 15.00% 15.00%
Elongation at break (permanent mold cast) 17.00% 17.00%
Elongation at break (sand cast) 25.00% 25.00%
Reduction of area (cast and annealed) 16.00% 16.00%
Compressive strength (at 0.1% permanent set; cast and annealed) 240 MPa 34800 psi
Compressive strength (at 1% permanent set; cast and annealed) 330 MPa 47900 psi
Compressive Strength (at 10% permanent set; cast and annealed) 690 MPa 100000 psi
Charpy impact (at -23-66°C/-9.40-151°F/ Keyhole) 13.0 J 9.59 ft-lb
Charpy impact (at -23-66°C/-9.40-151°F/ V-notch) 22.0 J 16.2 ft-lb
Fatigue strength (at number of cycles 1.00e+8/ rotating beam) 230 MPa 33400 psi
Machinability (UNS C36000 (free-cutting brass) = 100) 50% 50%
Shear modulus 42.0 GPa 6090 ksi
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

Thermal Properties

The thermal properties of the UNS C95800 alloy are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (at 20-300°C/68-572°F) 16.2 µm/m°C 9.00 µin/in°F
Thermal conductivity (at 20°C/68°F) 36.0 W/mK 250 BTU in/hr.ft².°F

Other Designations

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Equivalent materials to UNS C95800 alloy are:

  • ASTM B148
  • ASTM B271
  • ASTM B30
  • ASTM B505
  • ASTM B763
  • ASTM B806
  • MIL B-24480
  • QQ C390
  • SAE J461
  • SAE J462

Fabrication and Heat Treatment


Welding processes suitable for UNS C95800 alloy include brazing, soldering, coated metal arc welding and gas shielded arc welding. Oxyacetylene welding and carbon arc welding are not recommended for this alloy.


The machinability rating of UNS C95800 alloy is 50.

Heat Treatment

UNS C95800 alloy has stress relieving temperature of 316°C (600°F). This alloy does not react to heat treatment. The time at temperature for this alloy is one hour per inch of section thickness.


UNS C95800 alloy is used in parts that come in contact with salt water such as blades, propellers etc.

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