Copper Alloy (UNS C83450)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


UNS numbers C83300 to C85800 indicate cast red, yellow and leaded brasses, which are a category of copper alloys. Brass is derived when copper is alloyed with zinc. By varying the quantities of zinc and copper a range of brasses can be obtained with varying properties.

The following datasheet discusses the chemical composition and properties of copper UNS C83450.

Chemical Composition

The chemical composition of UNS C83450 copper alloy is outlined in the following table.

Element Content (%)
Copper, Cu 87-89
Zinc, Zn 5.5-7.5
Tin, Sn 2-3.5
Lead, Pb 1.5-3
Nickel, Ni 0.8-2
Iron, Fe 0.3
Antimony, Sb 0.25
Sulfur, S 0.08
Phosphorous, P 0.03
Silicon, Si 0.005
Aluminum, Al 0.005

Physical Properties

The following table discusses the physical properties of copper UNS C83450.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3
Melting point (solidus) 860°C 1580°F

Mechanical Properties

The mechanical properties of UNS C83450 copper sand cast alloy (M01 – temper) are tabulated below.

Properties Metric Imperial
Tensile strength 207 MPa 30 ksi
Yield strength 97 MPa 14 ksi
Machinability 75 75

Other Designations

Other designations that are equivalent to copper UNS C83450 include:

  • ASTM B584
  • ASTM B763


Welding - Soldering and brazing are considered as excellent welding options for copper UNS C83450. Oxyacetylene welding and gas shielded arc welding are rated as fair. Coated metal arc welding should be avoided.


Copper UNS C83450 finds use in:

  • Boat hardware
  • Water pump parts
  • Electrical hardware
  • Low pressure valve bodies
  • Plumbing and pipe fittings
  • Iron waterworks valve trim


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