Leaded Brass UNS C34500

Topics Covered

Chemical Composition
Mechanical Properties
Other Designations


Brass comprises a wide range of copper-zinc alloys consisting of a variety of properties including machinability, color, wear-resistance, strength, ductility, hardness, antimicrobial, corrosion-resistance, and electrical and thermal conductivity. UNS C34500 leaded brass alloys are one of the types of brass, which possess excellent combination of machining and formability features.

The following datasheet will provide more details about UNS C34500 leaded brass alloys.

Chemical Composition

The following table shows the chemical composition of UNS C34500 leaded brass alloys.

Element Content (%)
Fe ≥ 0.150
Cu 62.0-65
Pb 1.50-2.50
Zn 32.5-36.5

Mechanical Properties

The mechanical properties UNS C34500 leaded brass alloys are tabulated below.

Properties Metric Imperial
Hardness, Rockwell B 66 66
Tensile strength at break 372 MPa 54000 psi
Yield strength 234 MPa 34000 psi
Elongation at break 35% 35%
Machinability (UNS C36000 = 100) 90 90

Other Designations

Equivalent materials to UNS C34500 leaded brass alloys are:

  • ASTM B453
  • SAE J461
  • SAE J463


UNS C34500 leaded brass alloys are mainly used for screw machine products that require limited cold formability, knurling, crimping, peening, and thread rolling.

The other uses of UNS C34500 are as follows:

  • Hose fittings
  • Plumbing valve components
  • Bicycle spoke nipples
  • Watch
  • Clock and lock parts

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