Cu-Ni 90/10 Pipes Manufacturer in India
Cu-Ni 90/10 Pipes Manufacturers in India
Stainless Steel Pipe Manufacturers is a leading Cu-Ni 90/10 Pipes Manufacturer in India, established in 2005 with 20+ years of experience in manufacturing and supplying industrial pipes and tubes. Our facility is near Mumbai, with an export office in Mumbai, and we supply customers across 85+ countries. Cu-Ni 90/10 pipes are known for their resistance to seawater corrosion, biofouling, and erosion, making them suitable for demanding marine and cooling-water systems.
We supply 90/10 copper-nickel pipes in grades such as UNS C70600 and CuNi10Fe1Mn, with different sizes, wall thicknesses, lengths, and finishes according to the required specification. Products can be supplied to applicable ASTM, ASME, EN, and other international standards. Our quality systems include ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, PED 2014/68/EU, and TÜV approvals. EN 10204 3.1 certification is supplied with every order, while 3.2 certification and third-party inspection can be arranged on request.
What Are Cu-Ni 90/10 Pipes?
Cu-Ni 90/10 pipes are pipes made from a copper-nickel alloy containing about 90% copper and 10% nickel. Small additions of elements such as iron and manganese are used in many commercial grades to improve strength, corrosion resistance, and overall performance. The alloy is well known for its resistance to seawater corrosion, erosion, and biofouling, while also offering good strength and weldability. Cu-Ni 90/10 pipes are commonly supplied as UNS C70600 and related 90/10 copper-nickel grades, with seamless or welded construction available according to the required specification.
Cu-Ni 90/10 Pipes
High-quality Cu-Ni 90/10 Pipes manufactured for demanding applications across marine, shipbuilding, desalination, offshore, chemical, power generation and engineering industries. Available in multiple sizes, wall thicknesses and specifications.
Types of Cu-Ni 90/10 Pipes
As a Cu-Ni 90/10 Pipes Manufacturer, we supply different pipe forms, grades, sizes, and finishes for marine, seawater, heat-exchanger, and industrial applications.
- UNS C70600 Cu-Ni 90/10 Pipes: Standard 90/10 copper-nickel alloy pipes with strong seawater corrosion resistance.
- CuNi10Fe1Mn Pipes: Iron- and manganese-containing 90/10 copper-nickel alloy for improved strength and seawater service.
- Seamless Cu-Ni 90/10 Pipes: Manufactured without a weld seam for applications requiring seamless construction.
- Welded Cu-Ni 90/10 Pipes: Manufactured from copper-nickel strip or plate and welded for larger sizes.
- Annealed Cu-Ni 90/10 Pipes: Heat-treated pipes with improved ductility for forming and fabrication.
- Straight-Length Cu-Ni 90/10 Pipes: Supplied in fixed or standard straight lengths for piping installations.
- Thin-Wall Cu-Ni 90/10 Pipes: Lightweight pipe sections used where lower wall thickness meets the design requirements.
- Heavy-Wall Cu-Ni 90/10 Pipes: Selected for higher pressure, mechanical loading, or demanding service conditions.
- Plain-End Cu-Ni 90/10 Pipes: Supplied with plain ends for suitable joining and fabrication methods.
- Bevelled-End Cu-Ni 90/10 Pipes: End-prepared for butt welding and project-specific fabrication requirements.
Seamless, Welded, Annealed and Light-Drawn Cu-Ni 90/10 Pipes Manufacturers and Suppliers in India
We manufacture and supply Cu-Ni 90/10 Pipes in seamless and welded form and in the common tempers. The choice follows the pressure, the pipe size, the fabrication method and the budget.
- Seamless Cu-Ni 90/10 pipes (ASTM B466): the standard choice for pressure duty, critical lines and small to medium sizes.
- Welded Cu-Ni 90/10 pipes (ASTM B467): lower cost and shorter lead time, with larger diameters and even walls.
- Annealed pipes (O61): soft, easy to bend and flare, and the usual temper for ship and platform piping.
- Light-drawn pipes (H55): harder and stronger, used where the design calls for it.
- UNS C70600 base grade: the standard 90/10 copper-nickel alloy for general seawater service.
- Matching 70/30 and 80/20 grades: available when flow rates or pressure call for a stronger alloy.
These pipes are available in different outside diameters, wall thicknesses, lengths and end finishes according to the required specification.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
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→Get Certified Cu-Ni 90/10 Pipes at Competitive Factory Prices
Cu-Ni 90/10 Pipes Specification
The table sets out the working specification.
| Item | Detail |
|---|---|
| Product | Cu-Ni 90/10 Pipes |
| Grade | UNS C70600 (CuNi10Fe1Mn, CW352H, 2.0872) |
| Process | Seamless (drawn) or welded, then annealed |
| Pipe standards | ASTM B466 / ASME SB-466 (seamless), ASTM B467 / ASME SB-467 (welded) |
| Related standards | ASTM B111, MIL-T-16420, EN 12449 |
| Dimensions | ASME B36.19M schedules, or OD × wall as per drawing |
| Size reference | NPS 1/2 to 12 in the tables, other sizes on request |
| Length | Single random, double random or cut length |
| Ends | Plain or bevelled |
| Temper | Annealed (O61); light drawn (H55) on request |
| Surface | Clean, bright drawn or annealed finish |
| Tests | Chemical analysis, tensile, flattening, hydrostatic or non-destructive electric test |
| Certificate | EN 10204 3.1 with every order, 3.2 on request |
| Inspection | Third-party inspection on request |
Cu-Ni 90/10 Pipes Standards and Specifications
Cu-Ni 90/10 pipe is bought to a copper-alloy pipe standard, with related tube, plate and naval standards behind it. The table links each one to its job.
| Standard | Covers | Applies to |
|---|---|---|
| ASTM B466 / ASME SB-466 | Seamless copper-nickel pipe and tube | Seamless Cu-Ni 90/10 pipe |
| ASTM B467 / ASME SB-467 | Welded copper-nickel pipe | Welded Cu-Ni 90/10 pipe |
| ASTM B111 / ASME SB-111 | Copper and copper-alloy seamless condenser tubes | Condenser and heat-exchanger tubes |
| ASTM B543 | Welded copper and copper-alloy heat exchanger tube | Welded exchanger tubes |
| ASTM B122 | Copper-nickel plate, sheet and strip | Matching plate and strip |
| ASTM B151 | Copper-nickel rod and bar | Matching rod and bar |
| EN 12449, EN 12451 | Seamless round copper tubes, general purposes and heat exchangers | European copper-nickel tubes |
| MIL-T-16420 | Copper-nickel alloy tube, seamless and welded | Naval and marine work |
| ASME B36.19M | Pipe dimensions and weights | OD and wall reference |
| AWS A5.7 / A5.6 | Copper and copper-alloy bare welding rods and covered electrodes | ERCuNi, ECuNi filler |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Cu-Ni 90/10 Pipes Material and Grades
The standard 90/10 grade is UNS C70600, and the related copper-nickel grades are listed for reference. The table gives their UNS and EN numbers.
| Grade | UNS | EN number | Name | Standard | Typical use |
|---|---|---|---|---|---|
| Cu-Ni 90/10 | C70600 | CW352H, 2.0872 | CuNi10Fe1Mn | B466, B467 | Seawater cooling, fire mains, ballast |
| Cu-Ni 80/20 | C71000 | — | CuNi20 | B466 | Condenser and heat-exchanger tubes |
| Cu-Ni 70/30 | C71500 | CW354H, 2.0882 | CuNi30Mn1Fe | B466, B467 | Faster flow, higher pressure |
| Cu-Ni 70/30 (Fe, Mn) | C71640 | CW353H, 2.0883 | CuNi30Fe2Mn2 | B466 | Sand-laden, high-velocity seawater |
What Is the Difference Between Cu-Ni 90/10 Pipes and Stainless Steel 316L Pipes?
The short answer: 90/10 copper-nickel resists pitting and marine growth in seawater, while 316L stainless is stronger but can pit and crevice-corrode in warm, still or chlorinated seawater. Use 316L for fresh water and mild chemicals, and 90/10 for seawater cooling, fire mains and ballast lines.
| Point | Cu-Ni 90/10 Pipes | Stainless Steel 316L Pipes |
|---|---|---|
| Seawater corrosion | Very good, with a stable surface film | Can pit and crevice-corrode, especially warm or still |
| Marine growth | Resists fouling | Fouls readily |
| Chloride stress cracking | Immune | Can crack at higher temperature |
| Tensile strength, annealed | 260 MPa | 485 MPa |
| Density | 8.94 g/cm³ | About 7.98 g/cm³ |
| Thermal conductivity | About 40 W/m·K | About 16 W/m·K |
| Cost | Higher in most markets | Lower |
| Common standards | ASTM B466, B467 | ASTM A312 |
| Best for | Seawater cooling, fire mains, ballast, condensers | Fresh water, process and mild chemical lines |
Cu-Ni 90/10 Pipes Chemical Composition
Chemistry gives copper-nickel its seawater resistance. The table shows the ASTM B466 limits for UNS C70600, one element per row. Values are percentage by weight, maximum unless shown as a range or marked "min".
| Element | UNS C70600 (%) | Role in the alloy |
|---|---|---|
| Copper (Cu) | 86.5 min | Marine growth and corrosion resistance |
| Nickel (Ni, incl. Co) | 9.0–11.0 | Strength and corrosion resistance |
| Iron (Fe) | 1.0–1.8 | Erosion resistance and film formation |
| Manganese (Mn) | 1.0 | Film formation and deoxidising |
| Zinc (Zn) | 1.0 | Impurity limit |
| Lead (Pb) | 0.05 | Impurity limit |
Cu-Ni 90/10 Pipes Mechanical Properties
Mechanical and physical properties depend on the temper. The table gives the minimum strength for the annealed (O61) temper, with typical physical values.
| Property | Value |
|---|---|
| Tensile strength, min | 260 MPa (38 ksi) |
| Yield strength 0.5% ext., min | 105 MPa (15 ksi) |
| Density | 8.94 g/cm³ |
| Melting range | 1100–1145 °C |
| Thermal conductivity | 40 W/m·K |
| Modulus of elasticity | 135 GPa |
Cu-Ni 90/10 Pipes Size and Weight Chart
Weight depends on OD and wall thickness. Cu-Ni 90/10 has a density of about 8.94 g/cm³, so we use this formula:
OD and wall are in mm. Example: NPS 4 Sch 40S is (114.3 − 6.02) × 6.02 × 0.02809 = 18.31 kg/m. Multiply by length for total weight. Walls for each schedule are listed in the next section.
| NPS | OD (mm) | Sch 10S (kg/m) | Sch 40S (kg/m) | Sch 80S (kg/m) |
|---|---|---|---|---|
| 1/2" | 21.3 | 1.14 | 1.44 | 1.84 |
| 1" | 33.4 | 2.38 | 2.85 | 3.69 |
| 2" | 60.3 | 4.48 | 6.19 | 8.52 |
| 3" | 88.9 | 7.36 | 12.86 | 17.40 |
| 4" | 114.3 | 9.53 | 18.31 | 25.43 |
| 6" | 168.3 | 15.75 | 32.19 | 48.48 |
| 8" | 219.1 | 22.74 | 48.46 | 73.63 |
| 10" | 273.1 | 31.65 | 68.70 | 92.90 |
| 12" | 323.9 | 40.99 | 84.16 | 111.02 |
Available Sizes, Dimensions and Schedules
Cu-Ni 90/10 Pipes follow ASME B36.19M for Sch 5S, 10S, 40S and 80S, and other ODs and walls can be made to your drawing. A schedule is a wall-thickness code, so for the same OD a higher number means a thicker wall. Small bores often need a heavier wall to keep seawater velocity and erosion in check, so confirm the wall against your design code.
| NPS | OD (mm) | Sch 5S (mm) | Sch 10S (mm) | Sch 40S (mm) | Sch 80S (mm) |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 1.65 | 2.11 | 2.77 | 3.73 |
| 1" | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
| 2" | 60.3 | 1.65 | 2.77 | 3.91 | 5.54 |
| 3" | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
| 4" | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
| 6" | 168.3 | 2.77 | 3.40 | 7.11 | 10.97 |
| 8" | 219.1 | 2.77 | 3.76 | 8.18 | 12.70 |
| 10" | 273.1 | 3.40 | 4.19 | 9.27 | 12.70 |
| 12" | 323.9 | 3.96 | 4.57 | 9.53 | 12.70 |
Tolerances on OD, wall and length follow ASTM B466 for seamless pipe and ASTM B467 for welded pipe, and they depend on pipe size. Tell us if your drawing calls for closer limits.
Common Materials in Cu-Ni 90/10 Pipes
Our range includes commonly specified copper-nickel materials used with Cu-Ni 90/10 piping systems for seawater, marine, cooling-water and industrial applications. Material selection depends on the required alloy, strength, flow conditions and applicable specification.
UNS C70600 (CW352H): The standard 90/10 copper-nickel alloy, containing approximately 10% nickel with controlled iron and manganese additions for seawater service.
UNS C71500 (CW354H): A 70/30 copper-nickel grade for applications requiring higher nickel content and enhanced resistance under demanding service conditions.
UNS C71640 (CW353H): A 70/30 copper-nickel alloy with additional iron and manganese, suitable for demanding seawater conditions and higher-velocity flow.
ERCuNi Filler Metal: Copper-nickel welding filler used for joining compatible Cu-Ni piping components.
ECuNi Electrodes: Copper-nickel welding electrodes used for suitable fabrication and repair applications.
Copper-Nickel Plate, Strip and Rod: Matching materials used for fabricated components and piping accessories, available to applicable ASTM specifications such as ASTM B122 and ASTM B151.
These materials form part of our supply range as Cu-Ni 90/10 Pipes Suppliers, with different sizes, wall thicknesses, tempers and specifications available according to project requirements.
Cu-Ni 90/10 Pipes We Manufacture and Supply
We make Cu-Ni 90/10 Pipes for the seawater jobs below. The form and wall follow the flow rate, the size and the pressure.
| Service | Typical size | Typical form |
|---|---|---|
| Seawater cooling and circulating lines | NPS 2 to 12 | Seamless or welded |
| Fire mains and deluge systems | NPS 2 to 8 | Seamless |
| Ballast and bilge piping | NPS 2 to 10 | Welded |
| Condenser and heat-exchanger branches | NPS 1/2 to 4 | Seamless |
| Desalination seawater intake and brine lines | NPS 4 to 12 | Seamless or welded |
| Instrument and sampling lines | NPS 1/2 to 2 | Seamless |
Applications of Cu-Ni 90/10 Pipes
- Shipbuilding: Seawater cooling, fire main, ballast and bilge piping.
- Offshore platforms: Firewater, seawater lift and cooling lines.
- Desalination plants: Seawater intake, brine heater and transfer lines.
- Power plants: Condenser circuits and seawater cooling water lines.
- Naval vessels: Seawater service systems and auxiliary machinery cooling.
- Coastal refineries and chemical plants: Seawater-cooled heat exchangers.
- Aquaculture and fish hatcheries: Seawater supply lines that resist fouling.
- Marine engineering: Engine and auxiliary equipment cooling circuits.
Why Choose Us as Your Cu-Ni 90/10 Pipes Manufacturers in India?
With over two decades of experience in the pipes and tubes industry, we manufacture and supply Cu-Ni 90/10 Pipes for marine, seawater, shipbuilding, desalination, heat-exchanger, cooling-water, and industrial applications. Our range includes UNS C70600 and CuNi10Fe1Mn grades in different sizes, wall thicknesses, lengths, tempers, and end finishes according to the required specification.
Our quality systems are supported by ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications, along with PED 2014/68/EU and TÜV approvals. EN 10204 3.1 certification is supplied with every order, while 3.2 certification and third-party inspection can be arranged on request. Popular sizes may be available from ready stock, subject to availability, while specific grades and dimensions can be supplied for project requirements.
With a facility near Mumbai and an export office in Mumbai, we supply Cu-Ni 90/10 Pipes to customers across 85+ countries. Our Cu-Ni 90/10 Pipes Supplier in India setup supports material documentation, inspection coordination, export packing, and shipping requirements. We focus on correct alloy selection, specification compliance, customization, and reliable supply for both standard and project orders.
Countries We Export Cu-Ni 90/10 Pipes To
Our Cu-Ni 90/10 Pipes are supplied from India to 85+ countries, with export orders covering shipbuilding, offshore, desalination and power projects. We work with international specifications and arrange the required material documentation, inspection and shipment details for each order.
Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait and Bahrain
Europe: Germany, Italy, United Kingdom, Netherlands, France, Norway and Spain
Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan and Australia
North and South America: USA, Canada, Mexico and Brazil
Africa: South Africa, Nigeria, Egypt and Kenya
For overseas requirements, EN 10204 3.1 certification is supplied with every order. EN 10204 3.2 certification and third-party inspection can be arranged when specified. Export packing and shipping documentation are handled according to the order and destination, supporting the movement of Cu-Ni 90/10 pipes from India to international project locations.
Cu-Ni 90/10 Pipes FAQs
Common questions about Cu-Ni 90/10 pipe seawater velocity, protective film, marine growth, welding, and supply.
What seawater velocity can Cu-Ni 90/10 take?
As a rule of thumb, 90/10 is designed for velocities up to about 3.5 m/s, and less in small bores. Above that, erosion can wear the film, so choose 70/30 for faster flow. Follow your design code and project specification for the final limit.
How long does the protective film take to form?
It starts within hours of contact with clean seawater and thickens over the first weeks and months, then keeps improving. Filling the line with clean, flowing seawater before commissioning helps the film form evenly.
Does Cu-Ni 90/10 resist marine growth?
Yes. Copper ions released at the surface discourage barnacles, mussels and weed, so the pipe stays cleaner than steel or stainless. Keep the water moving, because long stagnant periods reduce the effect.
Can Cu-Ni 90/10 be used in polluted seawater?
Use caution. Sulphide in polluted or stagnant water can damage the protective film. Avoid long idle periods in harbour water, and flush the line with clean seawater before service.
Is there a galvanic risk with steel flanges and valves?
Yes. Copper-nickel is nobler than carbon steel, so steel parts in the same seawater line can corrode faster. Use insulating kits, compatible coatings or matching copper-nickel flanges where possible.
How should I weld Cu-Ni 90/10 pipes?
Use TIG or MIG welding with an ERCuNi filler or ECuNi electrodes, a clean joint and low heat input. Keep the joint free of oil, paint, sulphur and lead. Preheat is normally not needed.
Is Cu-Ni 90/10 better than 316L stainless steel for seawater?
For flowing seawater cooling, fire mains and ballast lines, usually yes, because it resists pitting, crevice corrosion and marine growth. Stainless 316L is stronger and costs less, so it suits fresh water and mild chemical lines.
What sizes, schedules and tolerances apply?
The tables above cover NPS 1/2 to 12 in Sch 5S, 10S, 40S and 80S. Tolerances follow ASTM B466 for seamless pipe and ASTM B467 for welded pipe. Other sizes and walls can be quoted on request, and popular sizes sit in ready stock, subject to availability.
How do I calculate the weight of an order?
Use Weight (kg/m) = (OD − Wall) × Wall × 0.02809, with OD and wall in mm. Multiply by length and quantity. Real weight varies slightly with wall tolerance.