Low Leaded Brass UNS C33500

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Welding
     Hot Working
     Cold Working
     Annealing
Applications

Introduction

UNS C33500 low leaded brass is an alloy containing copper, zinc and lead. It has excellent machinability and corrosion resistance. It is produced by piercing, punching and machining.

The following datasheet will discuss in detail about UNS C33500 low leaded brass alloy.

Chemical Composition

The following table shows the chemical composition of UNS C33500 brass alloys.

Element Content (%)
Cu 65
Pb 0.5
Zn 34.5

Physical Properties

The physical properties of UNS C33500 brass alloys are given in the following table.

Properties Metric Imperial
Density 8.47 g/cm3 0.306 lb/in³
Melting point 1070°C 1958°F

Mechanical Properties

The mechanical properties of UNS C33500 brass alloys are tabulated below.

Properties Metric Imperial
Tensile strength 317-510 MPa 46000-74000 psi
Yield strength (depending on temper) 97-414 MPa 14100-60000 psi
Elongation at break (in 203.2 mm) 65% 65%
Modulus of elasticity 105 GPa 15200 ksi
Poissons ratio (calculated) 0.35 0.35
Machinability (UNS C36000 (free-cutting brass) = 100) 60 60
Shear modulus 39 GPa 5660 ksi

Thermal Properties

The thermal properties of UNS C33500 brass alloys are tabulated below.

Properties Metric Imperial
Thermal expansion coefficient (@20-300°C/68-572°F) 20.3 µm/m°C 11.3 µin/in°F
Thermal conductivity (@20°C/68°F) 115 W/mK 798 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to UNS C33500 brass alloys include:

  • ASTM B121
  • ASTM B453

Fabrication and Heat Treatment

Machinability

The machinability rating of C33500 brass alloys is 60.

Welding

Welding methods such as soldering, brazing, oxyacetylene welding, gas shielded arc welding and butt welding are preferred for C33500 brass alloys. For this type of alloys, coated metal arc welding and seam welding are not preferred.

Hot Working

C33500 brass alloys have poor hot working property.

Cold Working

C33500 brass alloys have excellent cold working property.

Annealing

Annealing of C33500 brass alloys is performed at temperatures ranging from 427 to 704°C (800 to 1300°F)

Applications

The following are the major applications of UNS C33500 copper alloys:

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

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