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C89844

Lead-free Replacement for C844

Stocked alloy specs

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Reference guide

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Continuous cast • GreenAlloys™

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

C89844 spec sheet Standard products

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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C14500 C23000 C24000 C26000 C31400 C31600 C46400 C51000 C52100 C53400 C54400 C62400 C63000 C63020 C64200 C64210 C65100 C67300 C67400 C67410 C67600 C69300 C69400 C69430 C72900 (AMS 4596) C72900 (AMS 4597)
C72900 (AMS 4598) C83600 C83800 C84200 C84400 C84800 C85700 C86200 C86300 C86400 C86500 C86700 C87850 C89320 C89325 C89520 C89831 C89833 C89835 C89844 C90300 C90500 C90700
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C94700HT C94800 C95200 C95300 C95300HT C95400 C95400HT C95410 C95410HT C95500 C95500HT C95510 C95520HT C95600 C95800 C95900 C96400 C96900HT C97300 C97600 C97800 C99500 CONCAST380
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