C70600 Copper Nickel

C70600 Copper Nickel

91.3–94.8%
Copper Content
7.0–9.0%
Tin Content
0.03–0.35%
Phosphorus Content
C70600 copper nickel, commonly known as 90/10 CuNi, is a copper-nickel alloy offering excellent seawater corrosion resistance, biofouling resistance, and thermal conductivity. It is widely used in marine piping, condensers, heat exchangers, and offshore engineering applications.
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Lead Time: 3-5 Business Days

Product Overview

C70600 copper-nickel is a copper-nickel alloy containing approximately 90% copper and 10% nickel with controlled iron and manganese additions for enhanced seawater corrosion resistance. It is manufactured to ASTM B111, ASTM B122, ASTM B151, and related standards for demanding marine and industrial applications.

Produced through extrusion, rolling, drawing, and welding processes, C70600 offers excellent resistance to seawater corrosion, erosion corrosion, and marine biofouling. Its combination of corrosion resistance, thermal conductivity, and mechanical strength makes it one of the most widely used copper-nickel alloys worldwide.

C70600 copper nickel is extensively used in seawater piping systems, condensers, heat exchangers, desalination plants, offshore platforms, and shipbuilding applications where long-term reliability and corrosion resistance are critical.

Key Features

Excellent seawater corrosion resistance
Outstanding resistance to marine biofouling
Good erosion-corrosion resistance
Reliable thermal conductivity
Excellent weldability and fabrication performance
Long service life in marine environments

Available Sizes

Copper Shape Thickness (mm) Width/Diameter (mm) Length (m)
Bar - Φ5-200 1-6
Wire - Φ0.05-10 Customize
Sheet 0.25-6 500-2500 1-6
Plate 6-200 200-3000 1-6
Strip 0.15-6 8-610 Customize
Tube OD: φ2-600; WT:φ0.2-100mm - 1-6
Coil 0.15-6 3-1250 1-6
Foil < 0.15 10-1350 Customize
Profile Customized Customize Customize

* Custom sizes available upon request. Contact our sales team for special requirements.

Technical Specifications

Precision data for engineering decisions. All values tested per ASTM standards.

01 Material Properties

Specification Value Notes
Cu Content ~88.6% Provides corrosion resistance
Ni Content 9.0–11.0% Improves erosion resistance
Mn Content 1.0% max Enhances processing performance
Fe Content 1.0–1.8% Improves fatigue performance
Density 8.94 g/cm³ Typical value
Electrical Conductivity ~6% IACS Typical annealed condition
Tensile Strength 275–450 MPa Depends on temper
Elongation ≥ 30% Annealed condition
Fabrication Welding / Bending / Forming Excellent workability
ASTM Standard ASTM B111 / ASTM B122 / ASTM B151 EN & JIS available

Applications & Use Cases

Proven solutions across diverse industries. From aerospace to marine environments.

FAQ — C70600 Copper Nickel

Common engineering questions on C70600 copper nickel: composition, standards, properties and supply.

C70600, known as 90/10 cupronickel (CuNi10Fe1Mn), contains about 10% nickel with controlled iron (1.0–1.8%) and manganese. It is the standard marine-grade alloy for seawater piping and heat exchangers.
C70600 is covered by ASTM B111 (seamless condenser tube), B466 (seamless pipe), B122 (plate/sheet), B171 (pressure-vessel plate) and B432 (clad plate). Tube is typically supplied annealed (O61) or light-drawn (H55).
Annealed C70600 tube meets a minimum tensile strength of about 275 MPa with 105 MPa yield and 30%+ elongation; conductivity is about 9% IACS. Iron enables a protective surface film that resists seawater erosion and biofouling.
C70600 is the default for seawater cooling, ballast, firewater and desalination tubing where flow velocities are moderate. C71500 (70-30) is chosen for higher strength and faster, more aggressive seawater (up to about 4.5 m/s).
Linsy Copper supplies C70600 copper nickel against ASTM specs with per-order MTR/MTC, SGS on request, RoHS/REACH compliance, low-MOQ custom production and a 10–60 day lead time, with quote response within 1 hour.
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