Sep 11 2012
Topics Covered
IntroductionChemical CompositionPhysical PropertiesMechanical PropertiesThermal PropertiesOther DesignationsFabrication and Heat Treatment Machinability Welding Hot Working Cold Working Annealing
Introduction
Copper has the ability to be formed into alloys more freely than most metals, and can be combined with a broad range of alloying elements. This metal has excellent electrical and thermal conductivity of any commercial metal. There are 400 types of copper alloys with each consisting of a variety of properties that are suitable for many applications, manufacturing processes, and environments.
The following datasheet will provide details about UNS C70400 copper alloy.
Chemical Composition
The following table shows the chemical composition of UNS C70400 copper alloy.
| Element |
Content (%) |
| Cu |
92.4 |
| Fe |
1.5 |
| Ni |
5.5 |
| Mn |
0.6 |
Physical Properties
The physical properties of UNS C70400 copper alloy are outlined in the following table.
| Properties |
Metric |
Imperial |
| Density |
8.94 g/cm3 |
0.323 lb/in³ |
Mechanical Properties
The mechanical properties of UNS C70400 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
262-531 MPa |
38000-77000 psi |
| Yield strength (depending on temper) |
276-524 MPa |
40000-76000 psi |
| Elongation at break (in 50.8 mm) |
46% |
46% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
20 |
20 |
| Shear modulus |
44.0 GPa |
6380 ksi |
Thermal Properties
The thermal properties of UNS C70400 copper alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@20-300°C/68-572°F) |
17.5 µm/m°C |
9.72 µin/in°F |
| Thermal conductivity (@20°C/ 68°F ) |
64.0 W/mK |
444 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C70400 copper alloy are:
- ASME SB111
- ASME SB359
- ASME SB395
- ASME SB466
- ASME SB543
- ASTM B111
- ASTM B359
- ASTM B395
- ASTM B466
- ASTM B543
Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C70400 copper alloy is 20.
Welding
Soldering, brazing, oxyacetylene welding, gas shielded arc welding, coated metal arc welding, spot welding, seam welding, and butt welding are considered as suitable welding processes for UNS C70400 alloy.
Hot Working
The hot working capacity of UNS C70400 copper alloy is good with the recommended hot working temperature ranging between 843 and 954°C (1550 and 1750°F).
Cold Working
The cold working capacity of UNS C70400 is excellent.
Annealing
The annealing temperature of UNS C70400 copper alloy is between 593 and 816°C (1100 and 1500°F).