Copper Sand Cast Alloy (UNS C89831) – Mechanical Properties

Copper UNS C89831 has a copper content of not less than 87%.

The following table shows the mechanical properties of UNS C89831 sand cast alloy as a function of heat treatment.

TemperTensile Str.Yield Str.Elong.
M01237MPa (34ksi)105MPa (15ksi)20%

Typical uses

Industrial: corrosion-resistant/pressure-tight castings, high-speed/heavy-pressure bearings, impellers, pumps


C89831 Product description: Bismuth tin bronze

Solids: 1/2″ to 10″ O.D.
Tubes: 1 1/8″ to 9″ O.D.*
Rectangles: Up to 15″
Standard lengths: 144″
Shape/Form: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
Compliance: C89831 is compliant with key legislation including (1) Federal Safe Drinking Water Act – SDWA, (2) S. 3874 Federal Reduction of Lead in Drinking Water Act, (3) California AB1953, and (4) Vermont Act 193

*Consult mill for wall thickness

Typical uses

Industrial: corrosion-resistant/pressure-tight castings, high-speed/heavy-pressure bearings, impellers, pumps

Chemical composition

Chemical composition provided by CDA
10.01-2.0% as any single or combination of Ce La or other rare earth(x) elements as agreed upon. (x)ASM International definition: one of the group of chemically similar metals with atomic numbers 57 through 71 commonly referred to as lanthanides 2Ni value includes Co.
Note: Cu + sum of named elements, 99.0% min. Single values represent maximums.


Copper alloy UNS No.Machinability ratingDensity (lb/in3 at 68 °F)

Mechanical properties

Tensile strength, minYield strength, at 0.5% extension under load,, minElongation, in 2 in. or 50 mm minBrinell hardness (500 kg load)Remarks
ksiMPaksiMPa%typical BHN

Physical properties

Physical properties provided by CDA
US CustomaryMetric
Melting point – liquidus1893 °F1033 °C
Melting point – solidus1518 °F825 °C
Density0.318 lb/in3 at 68 °F8.81 gm/cm3 at 20 °C
Specific gravity8.818.81
Electrical conductivity20.38% IACS at 68 °F0.117 MegaSiemens/cm at 20 °C
Thermal conductivity50 Btu/sq ft/ft hr/°F at 68 °F86.6 W/m at 20 °C
Coefficient of thermal expansion 68-39210 · 10-6 per °F (68-392 °F)17.3 · 10-6 per °C (20-200 °C)
Specific heat capacity0.092 Btu/lb/°F at 68 °F385.4 J/kg at 20 °C
Modulus of elasticity in tension13700 ksi94458 MPa

Fabrication properties

Fabrication properties provided by CDA
Oxyacetylene weldingNot recommended
Gas shielded arc weldingNot recommended
Coated metal arc weldingPoor
Machinability rating85