Copper Casting Alloy – Leaded Red Brass UNS C83600

Topics Covered

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


Copper alloys are available in more than 400 varieties. Each type of copper alloy has specific properties that suit a number of manufacturing processes, environments and applications. Some of the copper alloy forms include:

  • Beryllium copper
  • Nickel silver
  • Tin bronze
  • Brass
  • Phosphor bronze
  • Gunmetal
  • Aluminum bronze
  • Copper-nickel

UNS C83600 alloy is a leaded red brass copper casting alloy. The following datasheet provides an overview of UNS C83600 alloy.

Chemical Composition

The chemical composition of UNS C83600 alloy is outlined in the following table.

Element Content (%)
Aluminium, Al 0.0050
Antimony, Sb 0.25
Copper, Cu 84-86
Iron, Fe 0.30
Lead, Pb 4.0-6.0
Nickel, Ni 1.0
Phosphorous, P 0.050
Silicon, Si 0.0050
Sulfur, S 0.080
Tin, Sn 4.0-6.0
Zinc, Zn 4.0-6.0

Physical Properties

The following table shows the physical properties of UNS C83600 alloy.

Properties Metric Imperial
Density 8.83 g/cm3 0.319 lb/in3

Mechanical Properties

The mechanical properties of UNS C83600 alloy are displayed in the following table.

Properties Metric Imperial
Hardness, Brinell (typical) 60 60
Tensile strength 255 MPa 37000 psi
Yield strength (@strain 0.500%) 117 MPa 17000 psi
Elongation at break (in 50 mm) 30% 30%
Creep strength (for 0.1% creep in 10,000 h, at 290°C) 48.0 MPa 6960 psi
Rupture strength (@230°C, time 3.60e+8 sec/446°F, time 100000 hour) 35.0 MPa 5080 psi
Modulus of elasticity 83.0 GPa 12000 ksi
Compressive strength 9 at permanent set of 0.1%, room temperature) 97.0 MPa 14100 psi
Charpy impact (V-notch) 15.0 J 11.1 ft-lb
Izod impact 14.0 J 10.3 ft-lb
Fatigue strength (@# of cycles 1.00e+8) 76.0 MPa 11000 psi
Machinability (UNS C36000 (free-cutting brass) = 100) 84 84

Thermal Properties

The thermal properties of UNS C83600 alloy are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@20-205°C/68-401°F) 18.0 µm/m°C 10.0 µin/in°F
Thermal conductivity (@20°C/68°F) 72.0 W/mK 500 BTU in/hr.ft².°F

Other Designations

Equivalent materials to UNS C83600 alloy is given in the table below.

AMS4855 ASME 16.32 ASME B16.15
ASME B16.18 ASME B16.23 ASME B16.24
ASTM B62 MIL C-11866 MIL V-18436
QQ C390 SAE J461 SAE J462

Fabrication and Heat Treatment


Welding processes suitable for the UNS C83600 alloy include brazing, soldering and coated metal arc welding. Gas shielded arc welding, oxyacetylene welding and carbon arc welding are not recommended for this alloy.


The machinability rating of the UNS C83600 alloy is 84.

Heat Treatment

The UNS C83600 alloy has stress relieving temperature of 260°C (500°F). This alloy does not react to heat treatment. The time at temperature for this alloy is one hour per inch of section thickness.

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