Leaded Tin Bronze – Copper Casting Alloy UNS C92600

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
     Heat Treatment


Bronze alloys are many in number and they include:

  • Phosphor bronze
  • Tin bronze
  • Aluminum bronze
  • Silicon bronze
  • Architectural bronze
  • Manganese bronze

The UNS C92600 alloy is a leaded tin bronze copper casting alloy. The datasheet given below provides an overview of the UNS C92600 alloy.

Chemical Composition

The chemical composition of the UNS C92600 alloy is outlined in the following table.

Element Content (%)
Copper, Cu 86.0-88.5
Tin, Sn 9.30-10.5
Zinc, Zn 1.30-2.50
Lead, Pb 0.80-1.20
Nickel, Ni 0.75
Sulfur, S 0.050
Phopshorus, P 0.030
Antimony, Sb 0.25
Iron, Fe 0.15
Aluminium, Al 0.0050
Silicon, Si 0.0050

Physical Properties

The following table shows the physical properties of the UNS C92600 alloy.

Properties Metric Imperial
Density 8.70 g/cm³ 0.314 lb/in³

Mechanical Properties

The mechanical properties of the UNS C92600 alloy are displayed in the following table.

Properties Metric Imperial
Hardness, Brinell 72 72
Hardness, Rockwell F 78 78
Tensile strength 304 MPa 44100 psi
Yield strength (@strain 0.500%) 140 MPa 20300 psi
Elongation at break (in 50 mm) 30.00% 30.00%
Compressive strength (at permanent set of 0.1%) 85.0 MPa 12300 psi
Compressive strength (at permanent set of 10%) 275 MPa 39900 psi
Izod impact 9.00 J 6.64 ft-lb
Machinability (UNS C36000 (free-cutting brass) = 100) 40 40
Poisson's ratio 0.34 0.34
Elastic modulus 117 GPa 16969 ksi

Other Designations

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Equivalent materials to the UNS C92600 alloy are ASTM B584 alloys.

Fabrication and Heat Treatment


Welding process suitable for the UNS C92600 alloy include brazing and soldering. Welding processes not recommended for this alloy include gas shielded arc welding, carbon arc welding, coated metal arc welding and oxyacetylene welding.


The machinability rating of the UNS C92600 alloy is 40.

Heat Treatment

The UNS C92600 alloy has a stress relieving temperature of 260°C (500°F). Samples should be held at the stress relieving temperature for 1 hour per 25mm of section thickness.

This alloy does not react to heat treatment.

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