Copper Nickel tubes C70600

Copper Nickel tubes C70600

Copper-nickel (also known as cupronickel) alloys offer excellent corrosion resistance to seawater and good fabricability. The addition of nickel to copper improves strength and corrosion resistance while allowing the alloy to remain ductile, other elements can be added to copper-nickel to increase strength, corrosion resistance, hardening, weldability and castability. The nickel-copper alloy has been widely used for r marine applications. C70600 often known as 90-10 copper-nickel, is the alloy with 90% copper and 10% nickel, has been widely used in the automotive, admiralty, shipping, offshore as well as power generation.



Copper Nickel tubes, 10% – C70600 – exhibits excellent resistance to impingement attack. It is also highly resistant to SCC. This alloy is suitable for Marine condenser tube installations in place of Aluminum Brass, especially where higher water velocities are encountered.


UNS No.C70600 – BSI No. CN102 – ISO Name CuNi10Fe1Mn
Chemical Comp. (%)Cu rem / Ni 9 ~ 11 / Pb 0.05 / Fe 1 ~ 1.8 / Zn 1 max / Mg 1 max
ASTM Spec.B 111, B395, B466, B 552
ASME Spec.SB 111, SB 395, SB466
ApplicationsCondenser, Evaporator and Heat Exchanger tubes; Distiller tubing; Salt Water piping.
TemperO61 Annealed / H55 Light-Drawn


Properties *MetricEnglish
Density8.94 g/cc0.323 lb/in³
Tensile Strength min.- O61 -/- H55275 MPa -/- 310 MPa40 ksi -/- 45 ksi
Yield Strength min.- O61 -/- H55105 MPa -/- 240 MPa15 ksi -/- 35 ksi
CTE, linear17.1 10-6/°C @ 20.0 – 300 °C9.5 10-6/°F @ 70.0 – 570 °F
Specific Heat Capacity0.09 cal/g-°C @ 20ºC0.09 BTU/lb-°F @ 70ºF
Thermal Conductivity45 W/m-K @ 20.0 °C26 BTU/ft2/ft/h/°F @ 70.0 °F
Melting Point1099 – 1149 °C2010 – 2100 °F

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