Jul 26 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Other Designations
Fabrication
Introduction
UNS C72700 is a copper-nickel alloy that is widely used in marine applications due to its good corrosion resistance, strength, and high inherent resistance to biofouling.
The following datasheet discusses the chemical composition and properties of copper UNS C72700.
Chemical Composition
The chemical composition of UNS C72700 copper alloy is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
8.5-9.5 |
|
Tin, Sn |
5.5-6.5 |
|
Iron, Fe |
0.5 |
|
Zinc, Zn |
0.5 |
|
Magnesium, Mg |
0.15 |
|
Niobium, Nb |
0.1 |
|
Manganese, Mn |
0.05-.030 |
|
Lead, Pb |
0.02 |
|
Copper, Cu |
Balance |
Physical Properties
The following table discusses the physical properties of copper UNS C72700.
|
Properties |
Metric |
Imperial |
|
Density |
8.8 g/cm3 |
0.321 lb/in3 |
Mechanical Properties
The mechanical properties of UNS C72700 (TB00-temper) are tabulated below.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
455 MPa |
66 ksi |
|
Yield strength |
200 MPa |
29 ksi |
|
Elongation |
36% |
36% |
Other Designations
Equivalent material to UNS C72700 copper alloy is ASTM B740.
Fabrication
Welding - Soldering, seam welding, butt welding, spot welding, brazing, and gas shielded arc welding are excellent techniques.
Forging - The hot forging temperature for copper UNS C72700 alloy ranges between 649 and 871ºC (1200 and 1600ºF).
Hot working - Copper UNS C72700 alloy has good hot working abilities.
Cold working - Copper UNS C72700 alloy has excellent cold working properties.
Annealing - Copper UNS C72700 alloy can be annealed at 732ºC (1350ºF).