Sep 18 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Applications
Introduction
Copper-nickel alloys have very good resistance to biofouling and marine corrosion, and possess good fabricability. Copper gains more strength and corrosion resistance when nickel is added to it.
The following datasheet will provide details about the UNS C71300 copper nickel alloy.
Chemical Composition
The following table shows the chemical composition of the UNS C71300 copper nickel alloys.
|
Element |
Content (%) |
|
Cu |
71.25-76.5 |
|
Fe |
≤ 0.20 |
|
Pb |
≤0.050 |
|
Mn |
≤ 1.0 |
|
Ni |
23.5-26.5 |
|
Zn |
≤ 1.0 |
Physical Properties
The physical properties of UNS C71300copper 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 C71300 copper nickel alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Hardness, Rockwell B (hard drawn-H80 for tubing / rolled-H04 for flat products) |
69 |
69 |
|
Tensile strength (annealed) |
359 MPa |
52000 psi |
|
Tensile strength (hard drawn-H80 for tubing / rolled-H04 for flat products) |
538 MPa |
78000 psi |
|
Yield strength (annealed) |
103 MPa |
15000 psi |
|
Elongation at break (hard drawn-H80 for tubing / rolled-H04 for flat products) |
11.00% |
11.00% |
|
Elongation at break (annealed) |
40% |
40% |
|
Elastic modulus (C71500 annealed) |
152 GPa |
22000 ksi |
|
Poisson’s ratio (C71500 annealed) |
0.325 |
0.325 |
|
Machinability (based on free-cutting brass = 100) |
20 |
20 |
|
Shear modulus (C71500 annealed) |
57.2 GPa |
8300 ksi |
Thermal Properties
The thermal properties of UNS C71300 copper nickel alloy are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@20-300°C/68-572°F) |
16.2 µm/m°C |
9.00 µin/in°F |
|
Thermal conductivity |
32.9 W/mK |
0.0900 BTU in/hr.ft².°F |
Applications
UNS C71300 copper nickel alloy is used in the following:
-
Fish cages used in for aquaculture
-
Offshore fire water systems
-
Heat exchangers and condensers
-
Hydraulic lines
-
Sheathing of legs and risers on boat hulls and offshore platforms
-
Sea water pipework
-
Desalination units