Sep 27 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Welding
Forging
Hot Working
Cold Working
Annealing
Introduction
Copper alloy UNS C42200 is a copper-zinc alloy. The excellent cold
working characteristics of UNS C42200 copper alloy makes it a preferred
alloy for architecture. UNS C42200 changes its color based on the
alloying metals present. Recycling of brass is very cost-effective.
Brasses have excellent machinability and are anti-corrosive.
The following datasheet summarizes the chemical composition and
properties of UNS C42200 copper alloy.
Chemical Composition
The following table presents the chemical composition of UNS C42200.
| Element |
Content
(%) |
| Copper, Cu |
87.5 |
| Tin, Sn |
1.1 |
| Zinc, Zn |
11.4 |
Physical Properties
The physical properties of UNS C42200 copper alloy are denoted in
the following table.
| Properties |
Metric |
Imperial |
| Density |
8.8 - 8.94 g/cm3 |
0.316 – 0.322 lb/in3 |
| Melting point |
1020 - 1040°C |
1870 - 1900°F |
| Solidus |
1020°C |
1870°F |
| Liquidus |
1040°C |
1900°F |
Mechanical Properties
The mechanical properties of UNS C42200 are summarized in the
following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
296 - 607 MPa |
42900 - 88000 psi |
| Yield strength |
103 - 517 MPa |
14900 - 75000 psi |
| Elongation at break |
46.00% |
46.00% |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
16969 ksi |
| Machinability |
30 |
30 |
Thermal Properties
The following table shows the thermal properties of UNS C42200
copper alloy.
| Properties |
Metric |
Imperial |
| Thermal conductivity (@20°C/68°F) |
130 W/mK |
902 BTUin/hr.ft2°F |
Other Designations
Equivalent designations to UNS C42200 include:
Fabrication and Heat Treatment
Machinability
The machinability rating of UNS C42200 copper alloy is 30.
Welding
The preferred welding techniques for UNS C42200 are soldering,
brazing, gas shielded arc welding, spot welding, seam welding and butt
welding. Oxyacetylene welding is not recommended for UNS C42200 copper
alloy.
Forging
UNS C42200 is forged at temperatures ranging between 829 and 890ºC
(1525 and 1635ºF).
Hot Working
UNS C42200 copper alloy produces good results on hot working.
Cold Working
UNS C42200 deforms well on cold working.
Annealing
The temperatures ranging between 498 and 676ºC (930 and 1250ºF) are
preferred for annealing UNS C42200 copper alloy.