C89844

Lead-free Replacement for C844

Reference guide

Continuous cast • GreenAlloys™

C89844, a C844 lead-free replacement alloy, supports the market demand for regulation-compliant lead-free material.

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%1 Al% 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
 
0.20
3.00-
5.00
7.00-
10.00
 
0.30
 
0.05
 
1.00
 
0.005
2.00-
4.00
 
0.08
 
0.25
 
0.005

Machinability

Copper alloy UNS No. Machinability rating Density (lb/in3 at 68 °F)
C89844 70 0.31

Mechanical properties

Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, in 2 in. or 50 mm min Brinell hardness (500 kg load) Remarks
ksi MPa ksi MPa % typical BHN  
28 193 13 90 5 55

Physical properties

Physical properties provided by CDA

  US Customary Metric
Melting point - liquidus 1850 °F 1010 °C
Melting point - solidus 1550 °F 853 °C
Density 0.310 lb/in3 at 68 °F 8.58 gm/cm3 at 20 °C
Specific gravity 8.58 8.58
Electrical conductivity 16.8% IACS at 68 °F 0.095 MegaSiemens/cm at 20 °C
Thermal conductivity 46.7 Btu/sq ft/ft hr/°F at 68 °F 80.9 W/m at 20 °C
Coefficient of thermal expansion 68-392 10 · 10-6 per °F (68-392 °F) 17.3 · 10-6 per °C (20-200 °C)
Specific heat capacity 0.08 Btu/lb/°F at 68 °F 335.2 J/kg at 20 °C
Modulus of elasticity in tension 13000 ksi 89622 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.
Technique Suitability
Soldering Excellent
Brazing* Good
Oxyacetylene welding Not recommended
Gas shielded arc welding Not recommended
Coated metal arc welding Not recommended
Machinability rating 70

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.
Treatment Value* Time**
Stress relief 500  
Solution treatment   0

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