Sep 26 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Welding Hot Working Cold Working Annealing
Introduction
UNS C68800 copper alloy has good corrosion resistance and excellent hot and cold formability.
The following datasheet provides more details about UNS C68800 copper alloy.
Chemical Composition
The following table shows the chemical composition of UNS C68800 copper alloys.
| Element |
Content (%) |
| Cu |
73.5 |
| Zn |
22.7 |
| Al |
3.4 |
| Co |
0.4 |
Physical Properties
The physical properties of UNS C68800 copper alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.20 g/cm3 |
0.296 lb/in³ |
Mechanical Properties
The mechanical properties UNS C68800 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
565-889 MPa |
81900-129000 psi |
| Yield strength (depending on temper) |
379-786 MPa |
55000-114000 psi |
| Elongation at break (in 50.8 mm) |
36.00% |
36.00% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
Thermal Properties
The thermal properties UNS C68800 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@20-300°C/68-572°F) |
18 µm/m°C |
10 µin/in°F |
| Thermal conductivity (@20°C/68°F) |
69 W/mK |
479 BTU in.hr.ft².°F |
Other Designations
Equivalent materials to UNS C68800 copper alloy are:
Fabrication and Heat Treatment
Welding
Soldering, brazing, spot welding, seam welding, and butt welding are considered as suitable welding processes for UNS C68800 copper alloy.
Hot Working
The hot working capacity of UNS C68800 copper alloy is rated as fair.
Cold Working
UNS C68800 alloy has excellent cold working capacity.
Annealing
The annealing temperature of UNS C68800 copper alloy is between and 399 and 593°C (750 and 1100°F).