Cupro Nickel

BMI supplies premium Cupro Nickel (Cu–Ni) Alloys, engineered for exceptional corrosion resistance in marine, saline, and brackish water environments.

Known for their stability, mechanical strength, and resistance to stress corrosion and biofouling, these alloys are vital for shipbuilding, desalination, offshore oil, and heat exchanger industries.

BMI sources and supplies Cupro Nickel products from leading international mills including Indigo Metalloys, Cubex Private Limited, KME Germany, Wieland Group, and Danfoss Metals, with complete traceability and certification.

SPECIFICATIONS FOR EVERY REQUIREMENT.

GRADES

Cupro Nickel 90/10 (UNS:C70600) 90% Cu, 10% Ni - ASTM B466 / B111 / B122 / B151
Cupro Nickel 70/30 (UNS:C71500) 70% Cu, 30% Ni - ASTM B466 / B552 / B111 / B171
Cupro Nickel 66/30/2 (Admiralty) Cu–Ni–Fe–Mn - BS 2871 / EEMUA 234
Cupro Nickel 80/20 (UNS:C71000) 80% Cu, 20% Ni - ISO 16348 / BS 2871, CN107

Specialty grades available upon request.

PRODUCT RANGE

Pipes & Tubes: Seamless & welded Cu–Ni 90/10 and 70/30 pipes as per ASTM B111 / B466
Sheets & Plates: Marine-grade plates for heat exchangers and condensers
Fittings: Elbows, tees, reducers, stub ends as per EEMUA 234 / ASME B16.9
Flanges: ANSI / DIN / BS type flanges in Cu–Ni 90/10 and 70/30
Rods & Bars: Forged and rolled solid round stock for marine fasteners
Coils & Strips: Thin wall condenser tube coils and clad strips
Custom Fabrications: Bends, headers, and manifolds for shipbuilding and desalination plants

STANDARDS

Seamless Tubes and Pipes - ASTM B111
Welded Tubes - ASTM B466
Plates, Sheets, and Strips - ASTM B122 / B151
Welded Pipe for Marine Condensers -ASTM B467
Tube and Fittings for Seawater Service - BS 2871 / EEMUA 234
German/European Cupro Nickel Standards - DIN 17664 / EN 1652
International Standard for Cu–Ni Materials - ISO 16348
Pressure Vessel Applications - ASME SB111 / SB122

MAKE

We source and stock products regularly from:

KME Germany AG
Wieland Group
Danfoss Metals
Mueller Industries
Tubacex Group
Cupro Nickel India Pvt. Ltd.
Indigo Metalloys
Cubex Tubings Limited

Specific Makes are available upon request

MTC is always provided when you choose BMI

QUALITY PARAMETERS SET BY BMI

Outstanding resistance to seawater corrosion and stress cracking
Excellent thermal conductivity and antifouling properties
High resistance to erosion and cavitation in turbulent marine flow
Non-magnetic and easily weldable using Cu–Ni or Monel fillers
Stable mechanical strength over long service life in saline environments

CHEMICAL COMPOSITION

Element CuNi 90/10 (C70600) CuNi 70/30 (C71500)

Copper (Cu) 88.6 – 90.0 65.0 – 70.0

Nickel (Ni) 9.0 – 11.0 29.0 – 33.0

Iron (Fe) 1.0 – 1.8 0.4 – 1.0

Manganese (Mn) 0.5 – 1.0 0.5 – 1.0

Lead (Pb) ≤ 0.02 ≤ 0.02

Zinc (Zn) ≤ 0.5 ≤ 0.5

Others Trace Trace

Balance Copper Copper

MECHANICAL PROPERTIES

Property CuNi 90/10 CuNi 70/30

Tensile Strength: 340 – 380 MPa 480 – 520 MPa

Yield Strength (0.2%): 105 MPa 165 MPa

Elongation: 30 – 35% 25 – 30%

Hardness (Brinell): 80 – 100 HB 110 – 130 HB

Density: 8.9 g/cm³ 8.9 g/cm³

Melting Range: 1125–1200°C 1180–1250°C

Operating Temperature: Up to 400°C Up to 450°C

Modulus of Elasticity: 140 GPa 150 GPa

INDUSTRY APPLICATIONS.

Shipbuilding & Offshore: Condenser tubes, seawater piping, hull fittings
Desalination Plants: Heat exchangers, evaporator tubing
Power Generation: Condensers, feedwater heaters
Oil & Gas: Platform cooling systems and offshore riser piping
Heat Exchangers: Cooling loops and water-cooled condensers
Marine Engineering: Pump shafts, valve components, and seawater filters