Sep 27 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Fabrication and Heat Treatment
Welding
Machinability
Heat Treatment
Introduction
Copper alloys are of many different varieties. Each copper alloy
variety has specific properties that suit a number of manufacturing
processes, environments and applications. Some of the copper alloy
forms include:
- Beryllium copper
- Nickel silver
- Tin bronze
- Brass
- Phosphor bronze
- Gunmetal
- Aluminum bronze
- Copper-nickel
UNS C84500 alloy is a copper casting alloy. The following datasheet
provides an overview of UNS C84500 copper casting alloy.
Chemical Composition
The chemical composition of the UNS C84500 copper casting alloy is
outlined in the following table.
| Element |
Content
(%) |
| Copper, Cu |
78 |
| Tin, Sn |
3 |
| Lead, Pb |
7 |
| Zinc, Zn |
12 |
Physical Properties
The following table shows the physical properties of the UNS C84500
copper casting alloy.
| Properties |
Metric |
Imperial |
| Density |
8.85 g/cm3 |
0.320 lb/in3 |
Mechanical Properties
The mechanical properties of the UNS C84500 copper casting alloy are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Hardness, Brinell (500 kg) |
55 |
55 |
| Tensile strength (as cast) |
241 MPa |
35000 psi |
| Yield strength (as cast) |
97.0 MPa |
14100 psi |
| Elongation at break (as cast) |
28.00% |
28.00% |
| Machinability (UNS C36000
(free-cutting brass) = 100) |
90 |
90 |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
16969 ksi |
Fabrication and Heat Treatment
Welding
Welding process suitable for the UNS C84500 copper casting alloy
include brazing, coated metal arc welding and soldering. Welding
processes not recommended for this alloy include gas shielded arc
welding, oxyacetylene welding and carbon arc welding.
Machinability
The machinability rating of the UNS C83400 alloy is 90.
Heat Treatment
The UNS C83400 alloy has stress relieving temperature of 260oC
(500oF). This alloy does not react to heat treatment. The time at
temperature for this alloy is one hour per inch of section thickness.