Low Leaded Brass UNS C33000

Topics Covered

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

Introduction

Brass is an alloy mainly consisting of copper and zinc. Brass alloys can be easily shaped and are available in various colors. UNS C33000 low leaded brass alloys have high corrosion resistance and good machinability. They are available in the form of tubes.

The following datasheet gives details about UNS C33000 brass alloys.

Chemical Composition

The following table shows the chemical composition of UNS C33000 brass alloys.

Element Content (%)
Cu 66
Pb 0.5
Zn 33.5

Physical Properties

The physical properties of UNS C33000 brass alloys are outlined in the following table.

Properties Metric Imperial
Density 8.50 g/cm3 0.307 lb/in3

Mechanical Properties

The mechanical properties of UNS C33000 brass alloys are tabulated below.

Properties Metric Imperial
Tensile strength 324 - 517 MPa 47000 - 75000 psi
Yield strength (depending on temper) 103 - 414 MPa 14900 - 60000 psi
Elongation at break (in 177.8 mm) 60% 60%
Elastic modulus 117 GPa 17000 ksi
Poisson’s ratio 0.34 0.34
Machinability (UNS C36000 (free-cutting brass) = 100) 60 60
Shear modulus 39 GPa 5660 ksi

Thermal Properties

The thermal properties of UNS C33000 brass alloys are given below.

Properties Metric Imperial
Thermal expansion co-efficient (@ 20 - 300°C/68 - 572°F) 20.2 µm/m°C 11.2 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 C33000 brass alloys include:

  • ASTM B135
  • MIL T-46072
  • SAE J461
  • SAE J463

Fabrication and Heat Treatment

Machinability

The machinability rating of UNS C33000 brass alloys is 60.

Welding

UNS C33000 brass alloys can be welded using brazing, soldering, gas shielded arc welding, butt welding, oxyacetylene welding, and spot welding methods. It is suggested that seam welding, and coated metal arc welding are not used for welding these alloys.

Hot Working

UNS C33000 brass alloys have poor hot forming capacity.

Cold Working

UNS C33000 brass alloys have good cold working capacity.

Annealing

UNS C33000 brass alloys can be annealed at temperatures ranging from 427 to 649°C (800 to 1200°F).

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