C71500 – CuNi 70-30% – CuNi30Mn1Fe

The highest durability among all copper alloys, for use in the most demanding conditions.

Copper nickel tubes (C71500), with 30% nickel content, offer the highest resistance to impingement attack and corrosion among all copper alloys. This exceptional durability makes them ideal for use in highly corrosive environments where extended service life is crucial.

C71500 tubes are particularly well-suited for applications involving exposure to aggressive acids and waters, providing superior longevity and performance compared to other copper alloys. They are the preferred choice in severe conditions where maximum resistance and durability are required.

UNS no.

C71500 – BSI No. CN107 – ISO name CuNi30Mn1Fe

Chemical comp. (%)

Cu rem / Ni 29 ~ 33 / Pb 0.05 / Fe 0.40 ~ 1 / Zn 1 max

ASTM spec.

B 111, B 359, B395, B 466, B 467, B 543, B 552

ASME spec.

SB 111, SB 395, SB 466

Applications

Heat exchangers, condensers, and cooling systems; desalination equipment, and marine piping systems.

Temper

O61 annealed / HR50 drawn & stress relieved

Properties *

Metric

English

Density

8.94 g/cm³

0.323 lb/in³

Tensile strength

360 MPa -/- 495 MPa

52 ksi -/- 72 ksi

Yield strength

125 MPa -/- 345 MPa

18 ksi -/- 50 ksi

CTE, linear

16.2 10-6/°C @ 20 – 300 °C

9.0 10-6/°F @ 70 – 570°F

Specific heat capacity

0.09 cal/g-°C @ 20ºC

0.09 BTU/lb-°F @ 70ºF

Thermal conductivity

29 W/m-K @ 20°C

17 BTU/ft2/ft/h/°F @ 70°F

Melting point

1171 – 1238°C

2140 – 2260°F

* The information provided on this page includes typical values which are only for general reference and information. These values are not intended for exact specification, design or engineering purposes.