Copper Nickel Products Manufacturer & Supplier in India
Kalpataru Piping manufactures, stocks and exports Copper Nickel (Cu-Ni) pipes, tubes, sheets and fittings engineered for marine and offshore service. Our copper nickel pipes, tubes, plates & sheets, fittings, flanges and fasteners are engineered to resist corrosion, biofouling and high pressure stress, while retaining strength, when your project requires all these properties. Our products are produced in Copper Nickel 90/10 and Copper Nickel 70/30 grades according to ASTM, ASME, DIN, BS and JIS standards and are used in shipbuilding yards, desalination plants, offshore platforms and power generation plants in over 40 countries. Each batch is chemically analysed, mechanically tested and third party inspected before leaving the work that guarantees the material you receive will perform exactly as described — the first time, every time. From seamless Cu-Ni tubing to bulk orders, Kalpataru Piping ensures your project stays on track with their technical expertise, transparency in pricing, and reliable logistics. Check out our full range of copper nickel products below and contact our engineering team if you need a quote that is tailored to you and will be available within 24 hours.
Table of Contents
- What Are Copper Nickel Products?
- Our Copper Nickel Product Range
- Specifications of Copper Nickel Products
- Chemical Composition of Copper Nickel
- Mechanical Properties of Copper Nickel
- Physical Properties of Copper Nickel Products
- International Equivalent Grades
- Cupro Nickel Price in India
- Copper Nickel Applications & Industries
- Copper Nickel 90/10 vs 70/30
- Manufacturing Process & Quality Commitment
- Certifications & Standards
- FAQs About Copper Nickel Products
What Are Copper Nickel Products?
Copper Nickel, commonly referred to as Cu-Ni or Cupro Nickel, is a copper-based alloy containing 10% to 30% nickel along with small additions of iron and manganese for added strength and stability. This unique metallurgical composition gives copper nickel outstanding resistance to seawater corrosion, biofouling, and stress-corrosion cracking — properties that ordinary stainless steel and carbon steel simply cannot match in marine conditions. Kalpataru Piping manufactures and supplies the complete copper nickel product family, including pipes, tubes, sheets, plates, coils, bars, rods, wires, forged and buttweld fittings, flanges, and fasteners, available in 90/10, 70/30, and 95/5 grades to match the exact technical requirement of your application.
Our Copper Nickel Product Range
- Copper Nickel Seamless & Welded Pipes (90/10 & 70/30)
- Copper Nickel Tubes & Heat Exchanger / Condenser Tubes
- Copper Nickel Sheets, Plates & Coils
- Copper Nickel Buttweld Fittings (Elbows, Tees, Reducers, Stub Ends, Caps)
- Copper Nickel Forged & Socket Weld Fittings
- Copper Nickel Flanges (Weld Neck, Slip-On, Blind, Socket Weld)
- Copper Nickel Bars, Rods & Wires
- Copper Nickel Fasteners (Bolts, Nuts, Washers, Studs)
- Copper Nickel Couplings, Unions & Adaptors
- ETP Copper Round Bars & Tapered Tube Plugs
Copper-Nickel Products
Specifications of Copper Nickel Products
Our copper nickel products are manufactured to meet stringent global engineering standards, ensuring consistent performance across pipes, tubes, fittings, and flanges.
| Parameter | Details |
| Grades | Copper Nickel 90/10, Copper Nickel 70/30, Copper Nickel 95/5 |
| UNS Designations | C70600, C70620, C71500, C71520, C71640 |
| Composition | 60–90% Copper, 9–30% Nickel, small additions of Iron & Manganese |
| Density | 8.5 – 8.95 g/cm³ |
| Operating Temperature | Up to 400°C (750°F) |
| Forms Available | Pipes, Tubes, Sheets, Plates, Coils, Bars, Rods, Wires, Fittings, Flanges, Fasteners |
| Standards | ASTM B111 / B171 / B466 / B467, ASME SB111 / SB171 / SB466 / SB467, DIN 86019, BS 2871 |
| Typical Applications | Seawater piping, condensers, heat exchangers, desalination plants, offshore & marine engineering |
Cupro Nickel Composition (%)
| Alloy | Cu (%) | Ni (%) | Fe (%) | Mn (%) | Pb (%) |
| 90/10 CuNi (C70600) | 89–90 | 9–10 | 1.0–1.8 | 1.0 max | 0.05 max |
| 70/30 CuNi (C71500) | 68–70 | 29–30 | 0.4–1.0 | 1.0 max | 0.05 max |
| 95/5 CuNi (C70400) | 94–95 | 4.8–6.2 | 1.3–1.7 | 0.3–0.8 | 0.05 max |
Table 3: Chemical composition limits for the three primary copper nickel grades.
Copper Nickel Mechanical Properties
| Property | 90/10 CuNi | 70/30 CuNi |
| Tensile Strength (MPa) | 275 – 450 | 360 – 600 |
| Yield Strength (MPa) | 105 – 220 | 125 – 320 |
| Elongation (%) | 30 – 45 | 25 – 40 |
| Hardness (HB) | 70 – 90 | 100 – 120 |
Physical Properties of Copper Nickel Products
| Property | 90/10 CuNi | 70/30 CuNi |
| Density (g/cm³) | 8.9 | 8.94 |
| Melting Point (°C) | 1170 – 1180 | 1225 – 1235 |
| Thermal Conductivity (W/m·K) | 29 – 31 | 26 – 28 |
| Electrical Resistivity (Ω·m) | ≈0.55×10⁻⁷ | ≈0.65×10⁻⁷ |
Table 5: Physical property comparison between 90/10 and 70/30 copper nickel.
International Equivalent Grades of Copper Nickel Products
| Standard | 90/10 CuNi | 70/30 CuNi |
| ASTM / UNS | B111 / C70600 | B171 / C71500 |
| BS | 2871 | 1400 |
| DIN | 2.0872 | 2.0883 |
| JIS | C7150 | C7060 |
Cupro Nickel Price in India
| Cupro Nickel Grade | Size Range | Price in India (Approx.) |
| Cupro Nickel 90/10 Pipe | 1/2″ NB to 24″ NB | ₹900 – ₹1,500 per kg |
| Cupro Nickel 70/30 Pipe | 1/2″ NB to 24″ NB | ₹1,200 – ₹2,000 per kg |
| Cupro Nickel 90/10 Tube | 6 mm to 100 mm OD | ₹950 – ₹1,600 per kg |
| Cupro Nickel 70/30 Tube | 6 mm to 100 mm OD | ₹1,250 – ₹2,100 per kg |
| Cupro Nickel 90/10 Fittings | Standard & Custom Sizes | ₹1,000 – ₹1,700 per kg |
| Cupro Nickel 70/30 Fittings | Standard & Custom Sizes | ₹1,300 – ₹2,200 per kg |
| Cupro Nickel Flanges | ANSI, ASME, DIN Standards | ₹1,100 – ₹2,000 per kg |
Note: Cupro Nickel prices in India vary based on grade, size, quantity, specifications, market conditions, and raw material costs. Contact us for the latest Cupro Nickel 90/10 and 70/30 pricing and availability.
Copper Nickel Applications & Industries We Serve
Copper nickel’s unmatched corrosion resistance makes it the material of choice across industries where saltwater exposure and high reliability intersect.
- Marine & Shipbuilding — seawater piping, bilge and ballast systems, hull fittings
- Desalination Plants — intake piping, condenser tubing, brine handling systems
- Power Generation — condensers, heat exchangers, cooling water systems
- Offshore Oil & Gas — firewater systems, fuel/oil lines, brine systems
- Chemical Processing — corrosion-resistant piping and valves
- Aerospace & Defense — components requiring high reliability in corrosive environments
Copper Nickel 90/10 vs. 70/30: Which Grade Do You Need?
Choosing between 90/10 and 70/30 copper nickel depends on the severity of seawater velocity, pressure, and mechanical load in your application.
| Criteria | 90/10 CuNi | 70/30 CuNi |
| Nickel Content | 9–10% | 29–30% |
| Relative Strength | Moderate | Higher |
| Erosion Resistance (high-velocity seawater) | Good | Excellent |
| Cost | Lower | Higher |
| Best Suited For | General seawater piping, condenser tubes | High-velocity systems, critical offshore piping |
Table 7: Quick-reference comparison to help you select the right copper nickel grade.
Our Manufacturing Process & Quality Commitment
At Kalpataru Piping, every copper nickel component moves through a controlled, traceable production process: raw material verification, precision forming or extrusion, heat treatment where applicable, dimensional inspection, and final chemical and mechanical testing. Our in-house quality team conducts spectrographic composition analysis, hydrostatic/pneumatic testing for pipes and tubes, and visual/dimensional checks on every fitting and flange before packing. This disciplined approach is why engineering teams and procurement managers return to us project after project — consistent quality, transparent documentation, and on-time delivery, without exception.
Certifications & Standards We Comply With
- ASTM B111 / B171 / B466 / B467 — Pipes & Tubes
- ASME SB111 / SB171 / SB466 / SB467 — Pressure Applications
- DIN 86019 / 2.0872 / 2.0883 — European Standards
- BS 2871 / 1400 — British Standards
- JIS C7150 / C7060 — Japanese Industrial Standards
- ISO 9001:2015 Quality Management Certified Manufacturing
FAQs About Copper Nickel Products
What is Copper Nickel and why is it used in marine engineering?
Copper Nickel is a copper-nickel alloy prized for its exceptional resistance to seawater corrosion and biofouling. It is widely used in marine engineering for seawater piping, condensers, and heat exchangers because it maintains structural integrity even after years of continuous saltwater exposure.
What is the difference between Copper Nickel 90/10 and 70/30?
The main difference is nickel content and resulting strength: 90/10 (C70600) contains about 10% nickel and suits general seawater piping, while 70/30 (C71500) contains around 30% nickel, offering higher strength and better resistance to high-velocity seawater erosion, making it preferable for more demanding offshore applications.
Can Copper Nickel be welded or brazed?
Yes. Copper Nickel alloys offer excellent weldability and can be joined using TIG, MIG, or brazing techniques without significant loss of corrosion resistance, provided proper filler material and welding parameters are used.
Which industries commonly use Copper Nickel products?
Copper Nickel products are widely used in shipbuilding, desalination plants, offshore oil and gas platforms, power generation facilities, and chemical processing plants, anywhere reliable performance in seawater or corrosive marine environments is critical.
What is copper-nickel used for?
Copper-nickel is widely used in marine, offshore, shipbuilding, power generation, and desalination industries due to its excellent resistance to seawater corrosion and biofouling. It is commonly used for pipes, tubes, condensers, heat exchangers, and seawater piping systems.
What is the raw material of copper-nickel?
Copper-nickel is an alloy primarily made from copper and nickel, with small amounts of iron and manganese added to improve strength and corrosion resistance. Common grades include Copper Nickel 90/10 and Copper Nickel 70/30.
