Copper Alloy (UNS C89835)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties


Copper UNS C89835 is a bismuth tin bronze cast alloy. It has good machinability,along with good polishing and plating characteristics. It also possesses better castability at lower temperatures.

The following datasheet discusses the chemical composition and properties of copper UNS C89835.

Chemical Composition

The chemical composition of UNS C89835 copper alloy is outlined in the following table.

Element Content (%)
Copper, Cu 85-89
Tin, Sn 6-7.5
Zinc, Zn 2-4
Bismuth, Bi 1.7-2.7
Nickel, Ni 1
Antimony, Sb 0.35
Iron, Fe 0.2
Phosphorous, P 0.1
Lead, Pb 0.09
Sulfur, S 0.08
Silicon, Si 0.005
Aluminum, Al 0.005

Physical Properties

The following table discusses the physical properties of copper UNS C89835.

Properties Metric Imperial
Density 8.89 g/cm3 0.321 lb/in3
Melting Point – (solidus) 785°C 1445°F
Melting Point – (liquidus) 1013°C 1855°F

Mechanical Properties

The mechanical properties of copper UNS C89835 are tabulated below.

Properties Metric Imperial
Tensile strength 206 MPa 30 ksi
Yield strength 96 MPa 14 ksi
Elongation 6% 6%
Hardness 65 65
Machinability 70 70

Thermal Properties

The thermal properties of copper UNS C89835 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 17.3 x 10-6 / °C 100 x 10-6 /°F
Thermal conductivity (@20°C/68°F) 65.8 W/mK 380 BTU in/hr.ft2.°F


Welding - Soldering is the best method to use for welding copper UNS C89835, while brazing can provide good results. It is recommended that oxyacetylene welding, gas shielded arc welding, and coated metal arc welding is avoided.


Copper UNS C89835 finds application in:

  • Faucets
  • Housings
  • Small gears
  • Pipe fittings
  • Plumbing goods
  • Pump components
  • Water pump impellers

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