Sep 18 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Hot Working Cold Working AnnealingApplications
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:
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