C71500 70/30 Copper-Nickel Tubing


Seamless tube: ASME SB466, ASTM B466

Welded tube ASTM B608, ASTM B467, ASME SB543, ASTM B543

U-Bend Tube: ASME SB395, ASTM B395

O.D: 6-530mm

W.T: 0.5-50mm


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. C71500 copper alloy, often known as 70/30 copper-nickel, is the alloy with 70% copper and 30% nickel content(as well as C71640), it has higher nickel content than that of C70600 which are more highly alloyed with aluminum, chromium, or tin are used where greater resistance to seawater environments, sand abrasion, wear and galling, as well as higher mechanical properties, are required.

Wiho metals is a fully stocked and leading metal manufacturer, supplier, exporter, distributor. We stock the copper alloy mill-product in the forms of plate, tubing, bar and rod. The copper alloy products provide by us shall be fabricated from prime quality raw materials and is fully certifiable to industrial specifications like ASTM and ASME or other relevant standards. Wiho metals mainly supply and stock a large inventory of alloy Copper C71500 (C7150T/CW354H) seamless tubing in accordance with ASTM B466 used for condensers, heat exchangers, Power Steering Tube, Brake Lines applications.  For more information on our extensive copper alloys inventory, size and specifications, please contact us or fill in the form below.

C71500 Tubing Equivalent Material

70Cu-30Ni C71500 CW354H CN107 CuNi30Mn1FE


C7150T BFe30-1-1


C71500 Tube Chemical Composition

Cu Fe Ni Pb Mn Zn
69.5000 0.40 – 1.0 29.0 – 33.0 ≤0.05 1.0 ≤0.3


C71500 Tube Mechanical Property

Temper code Tensile strength, Mpa Yield strength, Mpa Elongation, %
OS035 414 172 45


C71500 Physical Properties

Density 8.94 gm/cm3 @ 20 C
Melting Point – Liquidus 1238 C
Electrical Conductivity 0.027 MegaSiemens/cm @ 20 C
Coefficient of Thermal Expansion 16.2 . 10-6 per oC (20-300 C)



The 70-30 copper-nickel alloys have used saltwater and cover thermal desalination, offshore oil and gas, marine shipping, power generation and commercial. Copper-nickel alloys are also used for seawater cooling and firewater systems, hydraulic tubing, heat exchangers, evaporator Tubes and condensers, including brake tubing, platform riser and antimicrobial touch surfaces.

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