Copper (UNS C53400)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations


The UNS numbers C53200 to C54800 indicate leaded phosphor bronzes. They are a category of copper alloys. Leaded phosphor bronze alloys possess good strength and fatigue resistance coupled with good machinability, high wear resistance and corrosion resistance.

The following datasheet discusses the chemical composition and properties of copper UNS C53400.

Chemical Composition

The chemical composition of UNS C53400 copper alloy is outlined in the following table.

Element Content (%)
Tin, Sn 3.5-5.8
Lead, Pb 0.8-1.2
Zinc, Zn 0.3
Iron, Fe 0.1
Phosphorous, P 0.03-0.35
Copper, Cu Balance

Physical Properties

The following table discusses the physical properties of copper UNS C53400.

Properties Metric Imperial
Density 8.9 g/cm3 0.323 lb/in3
Melting point (solidus) 954 °C 1750° F

Mechanical Properties

The mechanical properties of copper UNS C53400 (H02-Temper) are tabulated below.

Properties Metric Imperial
Tensile strength 427 MPa 62 ksi
Modulus of elasticity in tension 110300 MPa 16000 ksi
Hardness, Rockwell B 70 70

Thermal Properties

The thermal properties of copper UNS C53400 are tabulated below.

Properties Metric Imperial
Thermal expansion co-efficient (@20-200°C/68-392°F) 17.14 x 10-6 /°C 9.90 x 10-6 /°F
Thermal conductivity (@20°C/68°F) 69.28 W/mK 400 BTU in/hr.ft².°F

Other Designations

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Equivalent materials to UNS C53400 copper alloys are the following:

  • ASTM B103
  • ASTM B139


Welding - Soldering is ideal for this alloy. Brazing and butt welding are rated as good while gas shielding arc welding, spot welding, and seam welding are rated as fair. Oxyacetylene welding is not recommended.

Hot working – Copper UNS C12900 alloy has poor hot working abilities.

Cold working - Copper UNS C12900 alloy has good cold working properties.


Copper UNS C53400 finds application in:

  • Bushings
  • Bearings and sleeve bearings
  • Fasteners
  • Thrust washers
  • Cam followers.

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