What Is C706 Copper-Nickel Tube
C706 copper-nickel tube excels in marine environments, offering superior resistance to seawater corrosion, biofouling, and stress corrosion cracking. Its excellent thermal conductivity and durability make it a popular choice for heat exchangers, condensers, and piping systems used in shipbuilding, offshore platforms, and power plants. Additionally, this tube performs reliably in industrial applications exposed to brine, acids, and other harsh chemicals.
Chemical Composition
Per ASTM B466, C70600 has copper including silver as remainder, nickel including cobalt 9.0 to 11.0 percent, lead 0.05 percent maximum, iron 1.0 to 1.8 percent, zinc 1.0 percent maximum, and manganese 1.0 percent maximum.
Mechanical Properties
In the standard annealed temper 060, the tensile strength is 260 MPa minimum and yield strength 90 MPa minimum, with Rockwell B hardness 30T 45 maximum. Harder tempers provide higher strength for demanding applications.
Dimensions
Pipe dimensions follow the standard pipe size system with outside diameters from 10.3 mm for 1/8 inch up to large diameters, and wall thicknesses from 1.47 mm specials up to schedule and extra strong walls. Regular and extra strong series provide standard pressure ratings for piping systems.
Applications
C70600 condenser tubes are used in shipbuilding and marine systems, offshore platforms, power plants, desalination plants, and industrial brine and chemical service. The combination of long-term durability, ease of fabrication, and low maintenance makes it a trusted material for critical systems.
Packaging
Copper-nickel tubes are packed in bundles strapped by strips and then loaded into containers to avoid any damage, with each bundle covered with plastic for protection against extreme weather and each tube end protected by plastic caps. U-bend tube radii are separated by separators.
Frequently Asked Questions
Q: What is the tensile strength of annealed C70600?
A: 260 MPa minimum.
Q: What standards cover C70600 pipe?
A: ASTM B466 and ASME SB466.
Q: Why is C70600 used in condensers?
A: Superior seawater corrosion and biofouling resistance.
Q: What sizes are available?
A: From 1/8 inch to large diameters with schedule and extra strong walls.
Q: Can C70600 handle brine and acids?
A: Yes, it performs reliably in harsh industrial chemicals.
Q: What is the yield strength annealed?
A: 90 MPa minimum.
Contact us for C70600 pressed and drawn condenser tubes with certified test reports.
