Copper Nickel 90/10 Flanges

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Copper Nickel 90/10 Flanges Manufacturer & Supplier in India – UNS C70600

Copper Nickel 90/10 Flanges are commonly applied to piping systems that are sought after for their superior corrosion-resistant properties, durability, and performance under harsh conditions in industrial applications. These flanges, which are formed of a 90 percent copper and 10 percent nickel alloy, have outstanding resistance to biofouling, erosion, and corrosion in seawater and are ideal for marine and offshore, as well as heat exchange applications. The controlled iron (1.0 to 1.8 percent) and manganese (0.1 to 0.5 percent) further contribute to the impingement corrosion resistance of the alloy in high-velocity seawater flow.

Kalpataru Piping Solution is a supplier of Copper Nickel C70600 Flanges (UNS C70600 / Werkstoff Nr.) that are available in high quality. Manufactured to international standards, including ASTM, ASME and ANSI (2.0872). We are a certified Cupro Nickel 90/10 Flanges Manufacturer and offer CuNi 90/10 Weld Neck Flanges, CuNi 90/10 Slip On Flanges, Copper Nickel Blind Flanges, threaded, socket weld, and lap joint types with different sizes and pressure ratings. For the wider Copper Nickel range, see our Copper Nickel Flanges hub or browse related Copper Nickel 70/30 Flanges.

Kalpataru Piping Solution is an ISO 9001:2015 certified Copper Nickel 90/10 Flanges Supplier and Copper Ni Flanges Exporter having more than 15 years of experience in supplying Copper Nickel Flanges to marine, offshore and industrial clients from 40 plus countries. We are fully compliant with ASME B16.5 certification for material traceability according to EN 10204 3.1B at our manufacturing facility. We are a trusted supplier of UNS C70600 Flanges with stock in Mumbai for quick delivery of your order in India and abroad.

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Table of Contents

Specifications of Copper Nickel Cu-Ni 90/10 (C70600) Flanges

Specification

Details

Standards

ANSI / ASME B16.5, ASME B16.47 Series A & B, EN 1092-1, BS 10, BS 4504, DIN, JIS, GOST, AWWA

Material Standard

ASTM B151 / ASME SB151 (rod and bar); ASTM B122 (plate); ASTM B171 (condenser plate)

UNS / Werkstoff

UNS C70600 / DIN 2.0872 (EN: CW352H, AFNOR: CuNi10Fe1Mn)

Size Range

1/2 inch (15 NB) to 48 inch (1200 NB), DN10 to DN5000

Pressure Class

Class 150, 300, 400, 600, 900, 1500, 2500; PN6 to PN100; JIS 5K to 63K; EN PN6 to PN40

Flange Face Type

Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Lap Joint Face (LJF), Male and Female (M&F)

Manufacturing Process

Forged, heat treated and precision machined

Test Certificates

EN 10204 3.1B, PMI report, third party inspection on request

Equivalent Grades of Copper Nickel Cu-Ni 90/10 (C70600) Flanges

Standard

UNS

WNR (DIN)

EN

AFNOR

BS

JIS

Copper Nickel 90/10

C70600

2.0872

CW352H

CuNi10Fe1Mn

CN102

C7060T

Chemical Composition of Copper Nickel Cu-Ni 90/10 (C70600) Flanges

Grade

Cu

Ni

Fe

Mn max

Pb max

Zn max

Cu-Ni 90/10

Remainder (min 86.5%)

9.0-11.0%

1.0-1.8%

1.0%

0.05%

1.0%

Mechanical Properties of Copper Nickel Cu-Ni 90/10 (C70600) Flanges

Property

Imperial

Metric

Tensile Strength (min)

50,000 psi

345 MPa

Yield Strength 0.2% offset (min)

18,000 psi

125 MPa

Elongation (min)

30%

30%

Hardness (max)

60 HRB

N/A

Density

0.323 lb/in3 at 68 deg F

8.94 g/cm3

Physical Properties of Copper Nickel Cu-Ni 90/10 (C70600) Flanges

Property

Unit

Value

Melting Range

deg C (deg F)

1100 to 1145 (2012 to 2093)

Specific Heat

J/kg K

377

Thermal Conductivity

W/m K

40

Coefficient of Thermal Expansion

micro m/m K (20 to 300 deg C)

17.1

Elastic Modulus

GPa

120

Electrical Conductivity

% IACS

4.5

Magnetic Permeability

N/A

Slightly magnetic (iron content)

 

Copper Nickel 90/10 vs 70/30 - Grade Comparison

Buyers frequently compare Cu-Ni 90/10 and 70/30 before specifying. The key differences:

Property

Cu-Ni 90/10 (C70600)

Cu-Ni 70/30 (C71500)

Nickel content

10%

30%

Copper content

90% (approx.)

70% (approx.)

Tensile strength (min)

345 MPa (50,000 psi)

380 MPa (55,000 psi)

Yield strength (min)

125 MPa (18,000 psi)

170 MPa (25,000 psi)

Seawater corrosion resistance

Excellent

Excellent (slightly better at high velocity)

Relative material cost

Lower

Higher (30% nickel vs 10%)

Primary applications

General marine, seawater cooling, condensers

High-velocity seawater, offshore, naval systems, desalination

Copper Nickel 90/10 Flanges Types

Existing product photography to be retained for each type:

  • CuNi 90/10 Weld Neck Flanges: high-pressure applications; long tapered hub distributes stress to the pipe wall
  • CuNi 90/10 Slip On Flanges: cost-effective; slides over the pipe end before welding
  • Copper Nickel Blind Flanges: closes off pipe ends; used in seawater and ballast systems for isolation
  • Socket Weld Flanges, Threaded Flanges, Lap Joint Flanges, Ring Type Joint (RTJ) Flanges
  • Long Weld Neck, Spectacle Blind, Orifice, Reducing, Square, Nipo, Bleed Ring, Plate Flanges also available
Dimensions of Copper Nickel Cu-Ni 90/10 (C70600) Flanges (Class 150, ANSI/ASME B16.5)

All dimensions in inches.

NPS

OD

Thickness

Bore

Bolt Circle

Bolt Holes

Hole Dia

1/2

3.50

0.44

0.38

2.38

4

0.62

3/4

3.88

0.50

0.44

2.75

4

0.62

1

4.25

0.56

0.50

3.12

4

0.62

1-1/4

4.62

0.62

0.56

3.50

4

0.62

1-1/2

5.00

0.68

0.62

3.88

4

0.62

2

6.00

0.75

0.69

4.75

4

0.75

2-1/2

7.00

0.88

0.75

5.50

4

0.75

3

7.50

0.94

0.81

6.00

4

0.75

4

9.00

0.94

0.94

7.50

8

0.75

6

11.00

1.00

1.06

9.50

8

0.88

8

13.50

1.12

1.25

11.75

8

0.88

10

16.00

1.19

1.31

14.25

12

1.00

12

19.00

1.25

1.56

17.00

12

1.00

16

23.50

1.44

1.75

21.25

16

1.12

20

27.50

1.69

2.13

25.00

20

1.25

24

32.00

1.88

2.50

29.50

20

1.38

Weight Chart of Copper Nickel Cu-Ni 90/10 (C70600) Flanges (kg)

Nominal Size

Class 150

Class 300

Class 600

Class 900

Class 1500

1/2 inch

1.0

1.2

1.5

1.8

2.2

3/4 inch

1.3

1.5

1.8

2.1

2.6

1 inch

1.6

1.9

2.3

2.7

3.3

1-1/4 inch

2.1

2.5

3.0

3.6

4.4

1-1/2 inch

2.6

3.1

3.8

4.5

5.5

2 inch

3.5

4.2

5.1

6.0

7.3

2-1/2 inch

4.7

5.6

6.8

8.1

9.8

3 inch

6.5

8.0

10.5

12.5

15.0

4 inch

10.0

13.0

17.5

22.0

28.0

6 inch

20.0

26.0

36.0

45.0

58.0

8 inch

35.0

47.0

65.0

85.0

110.0

10 inch

55.0

75.0

105.0

140.0

175.0

12 inch

80.0

110.0

155.0

200.0

250.0

16 inch

145.0

200.0

280.0

360.0

N/A

20 inch

230.0

320.0

450.0

N/A

N/A

24 inch

340.0

480.0

N/A

N/A

N/A

Copper Nickel Flanges Price

The following table shows the standard dimensions of Copper Nickel 90/10 Flanges (UNS C70600) manufactured according to international piping standards. These Cu-Ni 90/10 flanges are available in multiple nominal pipe sizes and are widely used in marine piping, heat exchangers, and offshore applications.

Copper Nickel Flanges Price varies based on the following factors. Contact our sales team for a firm quotation:

  • Flange type (weld neck requires more material and machining than slip-on or blind)
  • Size and pressure class
  • Certification level (EN 10204 3.2 carries a premium over 3.1)
  • Quantity (volume pricing for bulk orders of 500 kg or more)
  • Current LME copper market rate (C70600 price follows copper closely)
  • Request a firm quote

Applications of Copper Nickel 90/10 Flanges in Industries

  • Marine and Shipbuilding: Seawater cooling systems, ballast water treatment, firefighting systems, bilge piping, and seawater service lines
  • Offshore and Oil and Gas: Subsea pipeline connections, platform piping, seawater injection systems, and FPSO seawater handling
  • Power Generation: Condenser tube sheets, circulating cooling water systems, heat exchanger connections, and desalination plant evaporator flanges
  • Desalination Plants: Multi-effect distillation (MED) and multi-stage flash (MSF) systems requiring long-term resistance to brine and chlorides
  • Chemical Processing: Non-oxidising acid service, chloride-containing solutions, and chemical plant piping
  • Naval and Defence: Seawater piping systems in naval combatants per MIL-T-16420 specification; preferred for biofouling resistance and reduced maintenance intervals

Quality Testing & Inspection for Cu-Ni 90/10 Flanges

Test Type

Method / Standard

Purpose

Chemical Analysis (PMI)

OES/XRF per ASTM E1086

Verify Cu, Ni, Fe, Mn vs. ASTM B151 specification

Mechanical Testing

Tensile, yield, elongation per ASTM E8

Confirm tensile 345 MPa min, elongation 30% min

Hardness Testing

Rockwell B per ASTM E18

Check max 60 HRB

Hydrostatic Pressure Test

ASME B16.5 Section 8 (1.5x design pressure)

Verify no leakage under pressure

Liquid Penetrant Testing (LPT)

ASTM E165

Surface crack and porosity detection

Ultrasonic Testing (UT)

ASTM E114

Subsurface defect detection in forging

Radiographic Testing (RT)

ASTM E94

Internal defect detection in critical flanges

Dimensional Inspection

ASME B16.5 tolerance check

Verify OD, bore, thickness, bolt circle

ASTM B151 / B152 90-10 Copper Nickel Flanges Pressure Ratings

Standard

Flange Types

Pressure Classes

ASME/ANSI B16.5

Weld Neck, Slip On, Blind, High Hub Blind, Socket Weld, Lap Joint, Threaded, RTJ

150, 300, 400, 600, 900, 1500, 2500

ASME/ANSI B16.47

Weld Neck, Blind (Series A & B)

75, 150, 300, 400, 600, 900

BS 4504 Sec 3.1

Weld Neck, Hubbed Slip On, Plate, Blank

PN 2.5 to PN 40

BS 1560 / BS 10

Weld Neck, Socket Weld, Slip On, Blind, Screwed, Lap

Tables D, E, F, H; Class 150 to 2500

DIN Flanges

DIN 2527, 2566, 2573, 2576, 2631-2638, 2673

PN 6 to PN 100

JIS Flanges

All standard JIS types

5K, 10K, 16K, 20K, 30K, 40K, 63K

Export Markets

Kalpataru Piping Solution is a trusted CuNi 90/10 Flanges Stockist and exporter, shipping to clients across the Middle East, Europe, Southeast Asia, Africa, and the Americas, including the United Arab Emirates, Saudi Arabia, Singapore, the United Kingdom, and the United States. For a quote, contact our export team.

Other Available Stock of 90/10 Copper Nickel Flanges
  • Copper Nickel 90/10 WNRF Flanges Dealer
  • Cu-Ni Alloy 90/10 Spectacle Blind Flanges
  • 90/10 Cu-Ni Long Weld Neck Flanges Stockist
  • ASME SB151 Cupro Nickel 90/10 RTJ Flanges Supplier
  • ASME B16.5 Copper Nickel C70600 Blind Ring Flanges
  • B152 Copper Nickel 90/10 BLRF Flanges Distributors
  • Copper Nickel Alloy 90/10 Lap Joint Flanges
  • Copper Nickel 90/10 LJRF Flanges Manufacturer
  • 90/10 Copper Nickel Slip-on Raised Face Flanges
  • Copper Nickel 90-10 SORF Flanges Stockholder
  • SB152 Cu-Ni 90/10 Screwed Flanges Trader
  • ANSI B16.5 Copper Nickel 90/10 SWRF Flanges
  • Cupro Nickel 90/10 Reducing Flanges Stock
  • Copper Nickel 90/10 Tongue & Groove Flanges
  • 90/10 Copper Nickel EN 1092-1 Flanges in Mumbai
  • 90/10 Copper Nickel ASME/ANSI B16.5 Flanges
  • ASTM B151 Copper Nickel 90/10 Weldoflange
  • Grade 90/10 Copper Nickel Raised Face Flanges
  • SB151 CuNi 90/10 Blind Raised Face Flange
  • Copper Nickel 90/10 Forged Flanges Wholesaler
  • B16.5 Copper Nickel 90/10 Expander Flanges
  • Cu-Ni 90/10 Ring Spacers (Paddle Spacers)
  • Copper Nickel 90/10 Male & Female Flanges
  • B152 Copper Nickel 90/10 Flat Face Flanges
  • Copper Nickel 90/10 Flat Flanges Exporter
  • Cupro Nickel Alloy UNS C70600 Flanges
  • Copper Nickel DIN 2.0872 Flange
  • Copper Nickel 90/10 High Hub Blind Flanges
  • Copper Nickel 90/10 ASME B16.5 Loose Flanges
  • 90/10 Cu-Ni BS 4504 Flanges in India
  • 90/10 Copper Nickel DIN Flanges
  • Cu-Ni 90/10 Slip On Plate Flanges

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FAQs About Copper Nickel 90/10 Flanges

Copper Nickel 90/10 Flanges are pipe connection components manufactured from an alloy containing 90 percent copper and 10 percent nickel (UNS C70600, DIN 2.0872). They are widely used in marine, offshore, and industrial piping systems due to their excellent resistance to seawater corrosion, biofouling, and impingement attack in flowing seawater.

Copper Nickel 90/10 pipe flanges are commonly used in shipbuilding, offshore oil and gas, desalination plants, power generation, chemical processing, naval systems, and heat exchanger applications where long term corrosion resistance to seawater and brine is essential.

Cu-Ni C70600 flanges are manufactured to ASTM B151 (material standard for rod and bar) and dimensioned per ANSI B16.5, ASME B16.47, EN 1092-1, BS 4504, DIN, and JIS to ensure compatibility with global piping systems.

Copper Nickel 90/10 flanges are available in sizes from 1/2 inch (15 NB) to 48 inch (1200 NB) in multiple pressure classes from Class 150 through Class 2500.

The 90/10 grade (C70600) contains 10 percent nickel and is the more cost-effective choice for general marine and seawater cooling applications. The 70/30 grade (C71500) contains 30 percent nickel, offering higher tensile strength and slightly better corrosion resistance in very high velocity seawater flow. Most marine piping systems use 90/10; 70/30 is specified for more demanding offshore and naval applications.

Yes. Cu-Ni 90/10 has excellent weldability and can be joined by TIG (GTAW) and MIG (GMAW) welding using matching C70600 filler metal (ERCuNi). The joint area should be free of oil, oxide, and contamination before welding. Post weld annealing is generally not required for standard seawater service.

Standard supply includes EN 10204 3.1B Mill Test Certificates with full chemical composition and mechanical test results, PMI reports, and heat traceability documentation. EN 10204 3.2 third party witnessed inspection is available on request via Bureau Veritas, Lloyds, SGS, or TUV.

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