Sep 13 2012
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 C34000 medium leaded brass is alloy of copper, zinc and lead. It has good corrosion resistance and formability. It is produced by the processes such as blanking, heading, upsetting, machining, piercing, punching, roll threading, knurling and stamping.
The following section will discuss in detail about the UNS C34000 medium leaded brass alloy.
Chemical Composition
The following table shows the chemical composition of UNS C34000 brass alloys.
|
Element |
Content (%) |
|
Cu |
62.5 - 66.5 |
|
Fe |
0.10 |
|
Pb |
0.80-1.40 |
|
Zn |
34 |
|
Other |
0.50 |
Physical Properties
The physical properties of UNS C34000 brass alloys are given in the following table.
|
Properties |
Metric |
Imperial |
|
Density |
8.47 g/cm3 |
0.306 lb/in³ |
|
Melting point |
888°C |
1630°F |
Mechanical Properties
The mechanical properties of UNS C34000 brass alloys are tabulated below.
|
Properties |
Conditions |
|
T (°C) |
Treatment |
|
Poisson's ratio |
0.34 |
25 |
- |
|
Elastic modulus |
117 GPa |
25 |
- |
|
Tensile strength |
324-607 MPa |
- |
- |
|
Yield strength |
103-414 MPa |
25 |
(flat products, wire) |
|
Elongation |
60% |
- |
- |
Thermal Properties
The thermal properties of UNS C34000 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 C34000 brass alloys include:
Fabrication and Heat Treatment
Machinability
The machinability rating of C34000 brass alloys is 70.
Welding
Welding methods such as soldering, brazing and butt welding are preferred for C34000 brass alloys. Oxyacetylene welding, gas shielded arc welding, coated metal arc welding, seam welding and spot welding are not preferred for this type of alloys.
Hot Working
C34000 brass alloys have good poor working property.
Cold Working
C34000 brass alloys have good cold working property.
Annealing
Annealing of C34000 brass alloys is performed at temperatures ranging from 427 to 649°C (800 to 1200°F).
Applications
The following are the major applications of UNS C34000 brass alloys:
-
Hose fittings
-
Watch
-
Clock and lock parts
-
Bicycle spoke nipples
-
Plumbing valve components