Copper Sand Cast Alloy (UNS C89844) – Mechanical Properties

Copper UNS C89844 has a copper content of not less than 83%.

The following table shows the mechanical properties of UNS C89844 sand cast alloy as a function of heat treatment.

TemperTensile Str.Yield Str.Elong.
M01234MPa (34ksi)103MPa (15ksi)30%

The chemical composition of UNS C89844 copper alloy is outlined in the following table.

Cu%Pb%Sn%Zn%Fe%P%Ni%1Al%Bi%S%Sb%Si%
Chemical composition provided by CDA
1Ni value includes Co.
Note: Cu + sum of named elements, 99.3% min. Single values represent maximums.
83.00-
86.00
0.203.00-
5.00
7.00-
10.00
0.300.051.000.0052.00-
4.00
0.080.250.005

Category:

C89844 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: C89844 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

Plumbing: fittings/valves for potable water

Chemical composition

Cu%Pb%Sn%Zn%Fe%P%Ni%1Al%Bi%S%Sb%Si%
Chemical composition provided by CDA
1Ni value includes Co.
Note: Cu + sum of named elements, 99.3% min. Single values represent maximums.
83.00-
86.00
0.203.00-
5.00
7.00-
10.00
0.300.051.000.0052.00-
4.00
0.080.250.005

Machinability

Copper alloy UNS No.Machinability ratingDensity (lb/in3 at 68 °F)
C89844700.31

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
281931390555

Physical properties

Physical properties provided by CDA
US CustomaryMetric
Melting point – liquidus1850 °F1010 °C
Melting point – solidus1550 °F853 °C
Density0.310 lb/in3 at 68 °F8.58 gm/cm3 at 20 °C
Specific gravity8.588.58
Electrical conductivity16.8% IACS at 68 °F0.095 MegaSiemens/cm at 20 °C
Thermal conductivity46.7 Btu/sq ft/ft hr/°F at 68 °F80.9 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 capacity0.08 Btu/lb/°F at 68 °F335.2 J/kg at 20 °C
Modulus of elasticity in tension13000 ksi89622 MPa

Fabrication properties

Fabrication properties provided by CDA
*Since brazing is performed within the hot-short range, strain must be avoided during brazing and cooling.
TechniqueSuitability
SolderingExcellent
Brazing*Good
Oxyacetylene weldingNot recommended
Gas shielded arc weldingNot recommended
Coated metal arc weldingNot recommended
Machinability rating70

Thermal properties

Thermal properties provided by CDA
*Temperature is measured in fahrenheit. **For stress relief, solution treatment and annealing – time is measured in hours/inch of thickness. For precipitation heat treatment – time is measured in hours.