C71640 is a copper alloy formulated for primary forming into wrought products. It belongs to the
copper-nickel family and is known for its good combination of strength and improved corrosion resistance
compared to more common copper-nickel alloys like C71500. Here's a breakdown of its key characteristics:
Table: Key Properties of C71640
| Property |
Description |
| Chemical Composition |
- Primarily Copper (Cu): Balance <br> - Nickel (Ni): Nominal 66% <br> - Iron (Fe):
Nominal 2% <br> - Manganese (Mn): Nominal 2% <br> - Other (Sn, Pb, etc.): Trace
amounts
|
| Mechanical Properties |
- Good tensile and yield strength <br> - Improved corrosion resistance compared to C71500
<br> - Good workability for forming processes
|
| Common Brands (By Country) |
- Europe: CuNi66Fe2Mn2 [Europe] <br> - US: C71640 |
Important Note: Brand names might vary depending on the supplier.
Common Questions and Answers:
What are the typical applications of C71640?
C71640 finds use in various industries due to its improved properties:
Heat exchangers: Due to its good strength and corrosion resistance in various environments,
C71640 can be suitable for heat exchangers, particularly in marine applications.
Condenser tubes: Similar to heat exchangers, C71640 offers good performance in condenser
tubes exposed to corrosive fluids.
Piping and tubing: C71640 can be used for piping and tubing applications requiring strength
and corrosion resistance, especially in marine environments.
Desalination plants: Due to its ability to handle seawater, C71640 can be used in
desalination plants for components exposed to saltwater.
What are the advantages of C71640 compared to other copper-nickel alloys?
C71640 offers some advantages:
Improved corrosion resistance: Compared to C71500. a more common copper-nickel alloy,
C71640 offers better resistance to corrosion, particularly in saltwater environments.
Good workability: C71640's composition allows for good workability, making it suitable
for forming processes required in various applications.
How does C71640 compare to other corrosion-resistant alloys?
While C71640 offers good corrosion resistance, there might be other options depending on the specific
application:
Stainless steels: Can provide superior corrosion resistance but might be more expensive.
Nickel-aluminum bronzes: Offer excellent corrosion resistance and good strength, but might
be more expensive than C71640.
Important Note: Always consult with a material engineer or supplier to identify the most
suitable alloy for your specific application considering factors like strength, corrosion resistance
requirements, workability, cost, and the environment the component will operate in.
