What Is C70600 Hard Drawn Pipe
C70600 90/10 copper-nickel pipe is supplied in hard drawn and annealed tempers under ASTM B111 for condenser tubes and heat exchange service. The alloy's combination of seawater corrosion resistance, thermal conductivity, and mechanical strength makes it the standard material for marine condensers, heat exchangers, and piping systems.
Available Forms and Grades
Copper and copper alloy tube is available in grades C10100, C10200, C10300, C10800, C11000, C12000, C12200, C14200, C19200, C23000, C44300, C68700, C70600, and C71500, under standards B75, B88, B111, B280, B395, and B543. Walls range from 0.3 to 3.2 mm with outer diameters from 3.2 to 152 mm, in straight lengths from 3 to 6 m or custom coils, with drawn, bright, annealed, bare, or tin-plated finishes.
Hard Drawn versus Annealed
Hard drawn C70600 pipe provides higher strength and straightness for structural and pressure service, while annealed temper provides maximum ductility for bending and expanding. The 90/10 alloy retains good cold working properties in both conditions.
Key Properties
C70600 offers excellent resistance to seawater corrosion, impingement attack, and chloride stress corrosion cracking, with good thermal conductivity and inherent biofouling resistance. The protective oxide film that forms on the surface is self-healing.
Applications
C70600 hard drawn pipe is used in marine condensers, heat exchanger tubes, seawater cooling systems, desalination plants, shipboard piping, and power generation equipment, where strength and corrosion resistance are both required.
Frequently Asked Questions
Q: What is the difference between hard drawn and annealed?
A: Hard drawn is stronger and straighter; annealed is more ductile.
Q: What grades are available under B111?
A: C10100 through C71500, including 90/10 and 70/30 copper-nickel.
Q: What sizes are available?
A: Walls from 0.3 to 3.2 mm with outer diameters from 3.2 to 152 mm.
Q: Why is C70600 used in marine condensers?
A: Seawater corrosion resistance and biofouling resistance.
Q: What standards cover C70600 tube?
A: ASTM B111, B395, and B543.
Q: What finishes are available?
A: Drawn bright, annealed, bare, or tin-plated.
Contact us for C70600 90/10 copper-nickel pipes in hard drawn and annealed tempers.
