What Is C71500
C71500, 70/30 copper-nickel, is known for its moderate strength, workability, formability, and weldability. It is made up of 30 percent nickel in its composition. Copper-nickel alloy 715 finds its greatest application in areas of high temperatures and pressures combined with high velocity and destructive turbulence. The small iron content, up to about 1 percent, gives the alloy extraordinary resistance to general corrosion and stress corrosion cracking, making it very suitable for marine and industrial applications.
Chemical Composition
The composition limits are nickel 29.0 to 33.0 percent including cobalt, iron 0.40 to 1.0 percent, manganese 1.0 percent maximum, zinc 1.0 percent maximum, lead 0.05 percent maximum, with copper as remainder and copper plus named elements at least 99.5 percent.
International Equivalents
C71500 corresponds to EN 12451 CuNi30Mn1Fe, CW354H, DIN CuNi30Mn1Fe, BS 2871 CN107, JIS H3300 C7150, and GB/T 8890 BFe30-1-1, with nickel 30.0 to 32.0 percent and iron 0.4 to 1.0 percent in the European versions.
Key Properties
C71500 has a melting range of about 1170 to 1240 degrees C and is generally non-magnetic with a single-phase solid solution microstructure. Its high inherent strength and durable protective film allow it to withstand high flow velocities in seawater, typically up to 3.5 to 4 meters per second, without significant damage.
Applications
C71500 serves tube and tube plates for heavy-duty water condensers, heat exchangers, desalination plants, feed water heaters and evaporators in power stations, sugar refining plants, condenser systems, shipboard cooling-water circuits and sanitary services, fire sprinkler systems for ships, hydraulic and pneumatic piping, oil well pump liners, salt water pumps and piping for submarines and naval vessels, and wave and tidal energy generation equipment.
Frequently Asked Questions
Q: What is the nickel content of C71500?
A: 29.0 to 33.0 percent.
Q: Is C71500 magnetic?
A: No, it is generally non-magnetic.
Q: What is the melting range?
A: About 1170 to 1240 degrees C.
Q: What standards cover C71500?
A: ASTM B466 and ASME SB466.
Q: What applications use C71500?
A: Feed water heaters, condensers, desalination, and ship systems.
Q: How fast can seawater flow without damage?
A: Typically up to 3.5 to 4 meters per second.
Contact us for C71500 70/30 copper-nickel tubes and pipes with certified properties.
