Sep 13 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesOther DesignationsFabrication and Heat Treatment Welding Machinability Heat Treatment
Introduction
Copper alloys are available in a wide variety of forms and each copper alloy form 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 C84200 alloy is a copper casting alloy. The following datasheet provides an overview of the UNS C84200 alloy.
Chemical Composition
The chemical composition of UNS C84200 copper casting alloy is outlined in the following table.
| Element |
Content (%) |
| Cu |
80 |
| Sn |
5 |
| Pb |
2.5 |
| Zn |
12.5 |
Physical Properties
The following table shows the physical properties of UNS C84200 copper casting alloy.
| Properties |
Metric |
Imperial |
| Density |
8.70 g/cc |
0.314 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C84200 copper casting alloy are displayed in the following table.
| Properties |
Metric |
Imperial |
| Hardness, Brinell (500 kg) |
60 |
60 |
| Tensile strength (as cast) |
193 MPa |
28000 psi |
| Yield strength (as cast) |
103 MPa |
14900 psi |
| Elongation at break (as cast) |
27.00% |
27.00% |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
80 |
80 |
| Elastic modulus |
117 GPa |
16969 ksi |
| Poisson's ratio |
0.34 |
0.34 |
Other Designations
Equivalent materials to UNS C84200 copper casting alloy are:
- ASTM B30
- ASTM B505
- QQ C390
Fabrication and Heat Treatment
Welding
Welding processes suitable for UNS C84200 alloy include brazing, coated metal arc welding and soldering. Welding processes not suitable for this alloy include gas shielded arc welding, carbon arc welding and oxyacetylene welding.
Machinability
The machinability rating for UNS C84200 alloy is 80.
Heat Treatment
UNS C83300 alloy has a stress relieving temperature of 260°C (500°F). This alloy does not react to heat treatment. The time at temperature for this alloy is one hour per inch of section thickness.