Sep 18 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. Copper-nickel alloys have excellent resistance to biofouling and marine corrosion, and possess good fabricability.
The following datasheet will provide more details about UNS C71000 copper nickel alloy.
Chemical Composition
The following table shows the chemical composition of UNS C71000 copper nickel alloy.
| Element |
Content (%) |
| Cu |
79 |
| Ni |
21 |
Physical Properties
The physical properties of UNS C71000 copper nickel 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 C71000 copper nickel alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Tensile strength |
338-655 MPa |
49000-95000 psi |
| Yield strength (depending on temper) |
90.0-586 MPa |
13100-85000 psi |
| Elongation at break (in 76.2 mm) |
40% |
40% |
| Elastic modulus |
117 GPa |
17000 ksi |
| Poisson’s ratio |
0.34 |
0.34 |
| Machinability (UNS C36000 (free-cutting brass) = 100) |
20 |
20 |
| Shear modulus |
52 GPa |
7540 ksi |
Thermal Properties
The thermal properties of UNS C71000 copper nickel alloy are tabulated below.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient (@20-300°C/68-572°F) |
16.4 µm/m°C |
9.11 µin/in°F |
| Thermal conductivity (@20°C/ 68°F ) |
36 W/mK |
250 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to UNS C71000 copper nickel alloy are:
| ASME SB111 |
ASME SB359 |
ASME SB395 |
ASME SB466 |
| ASTM B111 |
ASTM B122 |
ASTM B206 |
ASTM B359 |
| ASTM B395 |
ASTM B466 |
ASTM B543 |
ASTM B694 |
| ASTM F467 |
ASTM F468 |
SAE J461 |
SAE J463 |
|
|
|
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Fabrication and Heat Treatment
Machinability
The machinability rate of UNS C71000 copper nickel alloy is 20.
Welding
Soldering, brazing, gas shielded arc welding, coated metal arc welding, seam welding, spot welding, oxyacetylene welding, and butt welding are considered as suitable for UNS C71000 alloy.
Hot Working
The hot working capacity of UNS C71000 copper nickel alloy is good with the recommended hot working temperature ranging between 871 and 1038°C ( 1600 and 1900°F).
Cold Working
The cold working capacity of UNS C71000 is good.
Annealing
The annealing temperature of UNS C71000 copper nickel alloy is between 649 and 816°C (1200 and 1500°F).