Condenser Cupronickel Tubes

Core Materials & Standards

1.1 C70600 (90/10 Copper-Nickel, BFe10-1-1)

• UNS: C70600
• Common Name: 90/10 cupronickel, B10 white copper
• Chemical Composition (ASTM B111):
  • Cu: Balance (88.0–91.2%)
  • Ni+Co: 9.0–11.0%
  • Fe: 1.0–1.8%
  • Mn: 0.5–1.0%
  • Pb: ≤0.02%
  • Impurities: ≤0.5%
• Key Advantages: Good corrosion resistance, high thermal conductivity (~50 W/(m·K)), cost-effective, excellent formability.
• Typical Use: General marine condensers, power plant condensers, freshwater cooling systems.

1.2 C71500 (70/30 Copper-Nickel, BFe30-1-1)

• UNS: C71500
• Common Name: 70/30 cupronickel, B30 white copper
• Chemical Composition (ASTM B111):
  • Cu: Balance (~70%)
  • Ni+Co: 29.0–33.0%
  • Fe: 0.4–0.7%
  • Mn: 0.5–1.0%
  • Pb: ≤0.05%
  • Impurities: ≤0.5%
• Key Advantages: Superior corrosion/erosion resistance, higher strength, ideal for severe seawater conditions.
• Typical Use: High-salinity marine condensers, offshore heat exchangers, high-velocity cooling systems.