Copper Nickel Heat Exchanger Manufacturer in India
Copper Nickel Heat Exchanger Tubes Manufacturer in India
Sachiya Steel International is a leading Copper Nickel Heat Exchanger Tubes Manufacturer in India, established in 2005 and headquartered in Mumbai, Maharashtra. With over 20 years of experience, we manufacture, supply, and export copper nickel heat exchanger tubes for marine, seawater, offshore, shipbuilding, condenser, and industrial applications.
Our products are supplied in grades including C70600 (90/10), C71500 (70/30), and C71640, with different sizes, wall thicknesses, lengths, and tempers available for project requirements. We operate with a monthly manufacturing and sourcing capacity of 100+ tons and serve customers across 85+ countries. Our quality management systems include ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018, along with applicable TÜV certifications. We also provide material certificates, inspection reports, and required documentation for domestic and international orders.
What Are Copper Nickel Heat Exchanger Tubes?
Copper Nickel Heat Exchanger Tubes are seamless copper-nickel tubes that carry cooling water, usually seawater, through a shell and tube exchanger, condenser or cooler. Heat passes through the thin tube wall from the hotter fluid on one side to the cooler fluid on the other.
Copper nickel suits this job for three reasons. It resists seawater corrosion and erosion. Copper in the alloy discourages marine growth, which keeps the tube surface clean and heat transfer high. And the alloy is easy to expand into a tubesheet, which gives tight joints. The two main alloys are 90/10 and 70/30, named for their copper-to-nickel split.
Copper Nickel Heat Exchanger Tubes
High-quality Copper Nickel Heat Exchanger Tubes manufactured for demanding applications across marine, chemical, petrochemical, power generation, desalination and engineering industries. Available in multiple grades, sizes, wall thicknesses and specifications.
Types of Copper Nickel Heat Exchanger Tubes
We manufacture and supply different types of Copper Nickel Heat Exchanger Tubes for condensers, coolers, marine systems, power plants, offshore equipment, and industrial heat transfer applications. Available options include:
- 90/10 Tubes (C70600): The standard exchanger alloy, containing 10% nickel and 1.0–1.8% iron.
- 70/30 Tubes (C71500): Contains 30% nickel and is suitable for warm, fast-flowing, or polluted cooling water.
- 70/30 Tubes with Higher Iron and Manganese (C71640): A strengthened alloy for demanding marine service.
- Annealed Tubes (O61): Soft and suitable for tight U-bends, expansion, and rolled joints.
- Light-Drawn Tubes (H55): Provides moderate strength and is commonly used for straight tubes.
- Straight Tubes: Cut to specified lengths for fixed tubesheet and floating-head heat exchanger bundles.
- U-Bend Tubes: Bent according to customer drawings for U-tube heat exchanger applications.
- Condenser Tubes: Longer, thin-wall tubes designed for steam condenser applications.
- Cooler and Oil-Cooler Tubes: Shorter, heavier-wall tubes used in engine coolers, oil coolers, and lubrication systems.
As an experienced Copper Nickel Heat Exchanger Tubes Manufacturer, we supply these tube types in different grades, sizes, wall thicknesses, lengths, and tempers based on customer and project requirements.
C70600 (90/10), C71500 (70/30) and C71640 Copper Nickel Heat Exchanger Tubes Manufacturers and Suppliers in India
We manufacture and supply C70600 (90/10), C71500 (70/30), and C71640 Copper Nickel Heat Exchanger Tubes for condensers, coolers, seawater systems, marine equipment, and industrial heat exchangers. Tubes are available in different sizes, wall thicknesses, lengths, and tempers, with standard and non-standard requirements supported.
C70600 (90/10) is copper nickel heat exchanger tube grades with applicable specifications, inspection documentation, and material certificates based on widely used for seawater heat exchangers and condensers, while C71500 (70/30) is selected for warmer, faster-flowing, or polluted cooling water. C71640 provides enhanced strength for demanding marine and offshore heat transfer applications. We supply these copper nickel heat exchanger tube grades with applicable specifications, inspection documentation, and material certificates based on project requirements.
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→Get Certified Copper Nickel Heat Exchanger at Competitive Factory Prices
Copper Nickel Heat Exchanger Tubes Specification
The table sums up how we describe a Copper Nickel Heat Exchanger Tubes order.
| Item | Detail |
|---|---|
| Product | Copper Nickel Heat Exchanger Tubes |
| Method | Seamless, extruded or pierced, then drawn |
| Alloys | C70600 (90/10), C71500 (70/30), C71640 |
| Tube standards | ASTM B111 / ASME SB111, ASTM B395 (U-bend), ASTM B466, EN 12451 |
| Size basis | OD and wall in mm or BWG, wall by minimum or average |
| Size range shown | OD 15.88 to 50.8 mm, other sizes on request |
| Gauges shown | BWG 20, 18, 16 and 14 |
| Tempers | Annealed (O61), light-drawn (H55) |
| Lengths | Fixed, random or cut length |
| Shapes | Straight tubes, or U-bend against a drawing |
| Surface | Bright or as-drawn |
| Tests | Chemical analysis, tensile, expansion test, hydrostatic or eddy current test |
| Certificate | EN 10204 3.1 with every order, 3.2 on request |
| Inspection | Third-party inspection on request |
Copper Nickel Heat Exchanger Tubes Standards and Specifications
Heat exchanger tubes are bought to a tube standard, with exchanger design rules above it. The table shows how each is used.
| Standard | What it covers | Where it applies |
|---|---|---|
| ASTM B111 / ASME SB111 | Seamless copper and copper-alloy condenser and heat exchanger tubes | Core standard for exchanger tubes |
| ASTM B395 | U-bend seamless copper and copper-alloy heat exchanger and condenser tubes | U-tube bundles |
| ASTM B466 / ASME SB466 | Seamless copper-nickel pipe and tube | General tube use |
| EN 12451 | Seamless round copper and copper-alloy tubes for heat exchangers | European exchangers |
| TEMA | Standards for shell and tube heat exchangers | Tube sizes, pitch and fits |
| HEI | Standards for steam surface condensers | Power plant condensers |
| ASME Section VIII, Div. 1 | Pressure vessel design rules | Wall and allowable stress |
| ASME Section II, Part D | Allowable stress values | Design stress by alloy and temperature |
| EN 10204 | Types of inspection documents | 3.1 and 3.2 certificates |
Copper Nickel Heat Exchanger Tubes Material and Grades
The table cross-references each alloy across standards and gives typical tube-side seawater velocities. These are design guides, and your designer sets the final figure.
| Alloy | UNS | EN designation | Werkstoff number | Typical tube-side velocity | Best for |
|---|---|---|---|---|---|
| 90/10 | C70600 | CuNi10Fe1Mn (CW352H) | 2.0872 | Up to about 2.5 m/s | Condensers, coolers, oil coolers |
| 70/30 | C71500 | CuNi30Mn1Fe (CW354H) | 2.0882 | Up to about 3.0 m/s | Warm, fast or polluted cooling water |
| 70/30 (higher Fe and Mn) | C71640 | — | — | Up to about 3.0 m/s | Naval and offshore specifications |
What Is the Difference Between Copper Nickel Heat Exchanger Tubes and Titanium Heat Exchanger Tubes?
The short answer: copper nickel tubes resist marine fouling and cost much less, while titanium tubes resist corrosion even in polluted or ammonia-laden water and handle higher velocity. For clean seawater at normal flow, copper nickel is the economical choice. For polluted, fast or ammonia-bearing water, titanium may be the safer one.
| Factor | Copper Nickel Heat Exchanger Tubes | Titanium Heat Exchanger Tubes |
|---|---|---|
| Clean seawater corrosion | Excellent | Excellent |
| Marine fouling | Resists growth | Prone to growth |
| Sulphide-polluted water | Sensitive | Immune |
| Ammonia | Can crack | Not affected |
| Velocity limit in seawater | About 2.5 to 3.0 m/s in tubes | Much higher |
| Thermal conductivity | About 29 to 40 W/m·K | About 20 W/m·K |
| Cost | Lower | Much higher |
| Typical use | Ships, coastal power, desalination | Polluted or fast seawater, critical duty |
Copper Nickel Heat Exchanger Tubes Chemical Composition
Chemistry sets seawater resistance, and iron and manganese strengthen the protective film. The table shows the main elements. Values are percentage by weight, maximum unless shown as a range.
| Alloy | Cu | Ni (incl. Co) | Fe | Mn | Zn max |
|---|---|---|---|---|---|
| C70600 (90/10) | Balance | 9.0–11.0 | 1.0–1.8 | 1.0 max | 1.0 |
| C71500 (70/30) | Balance | 29.0–33.0 | 0.40–1.0 | 1.0 max | 1.0 |
| C71640 | Balance | 29.0–32.0 | 1.7–2.3 | 1.5–2.5 | 0.50 |
Lead, sulphur, phosphorus and carbon are held to low limits in each alloy.
Copper Nickel Heat Exchanger Tubes Mechanical Properties
Strength in copper nickel depends on temper. ASTM B111 and B466 set minimum tensile and yield strength by alloy and temper, and your certificate shows the figures for the temper supplied. For reference, annealed C70600 and C71500 carry minimums of 275 and 360 MPa tensile and 105 and 125 MPa yield under ASTM B466. The first table matches each tube operation to the best temper.
| Operation | Best temper | Why |
|---|---|---|
| Rolling into a tubesheet | Annealed or light-drawn | Soft enough to expand into a tight joint |
| Tight U-bends | Annealed | Bends without cracking |
| Long straight tubes | Light-drawn | Holds shape in a long bundle |
| Vibration-prone spans | Light-drawn, with support spacing | More stiffness |
The second table gives design data for heat exchanger calculations.
| Property | C70600 (90/10) | C71500 (70/30) |
|---|---|---|
| Density | 8.94 g/cm³ | 8.94 g/cm³ |
| Thermal conductivity | About 40 W/m·K | About 29 W/m·K |
| Thermal expansion (20–100°C) | About 17.1 µm/m·K | About 16.2 µm/m·K |
| Specific heat | About 377 J/kg·K | About 377 J/kg·K |
| Modulus of elasticity | About 135 GPa | About 152 GPa |
| Melting range | 1100–1145°C | 1170–1240°C |
Copper Nickel Heat Exchanger Tubes Size and Weight Chart
Weight depends on OD and wall thickness. Copper nickel has a density of about 8.94 g/cm³, so we use this formula:
OD and wall are in mm. Example: a 19.05 mm (3/4") OD tube with an 18 BWG wall of 1.24 mm weighs (19.05 − 1.24) × 1.24 × 0.02809 = 0.62 kg/m. All figures in the first table are kg/m.
| OD (mm) | OD (in) | 20 BWG, 0.89 mm | 18 BWG, 1.24 mm | 16 BWG, 1.65 mm | 14 BWG, 2.11 mm |
|---|---|---|---|---|---|
| 15.88 | 5/8" | 0.37 | 0.51 | 0.66 | 0.82 |
| 19.05 | 3/4" | 0.45 | 0.62 | 0.81 | 1.00 |
| 25.4 | 1" | 0.61 | 0.84 | 1.10 | 1.38 |
| 31.75 | 1-1/4" | 0.77 | 1.06 | 1.40 | 1.76 |
| 38.1 | 1-1/2" | 0.93 | 1.28 | 1.69 | 2.13 |
| 50.8 | 2" | 1.25 | 1.73 | 2.28 | 2.89 |
Bundle weight adds up fast. The next table gives the weight of one tube at common lengths, calculated from the unrounded kg/m figures. All figures are in kg per tube.
| Tube | 3.0 m | 6.0 m | 9.0 m |
|---|---|---|---|
| 19.05 mm OD, 18 BWG | 1.86 | 3.72 | 5.58 |
| 19.05 mm OD, 16 BWG | 2.42 | 4.84 | 7.26 |
| 25.4 mm OD, 18 BWG | 2.52 | 5.05 | 7.57 |
| 25.4 mm OD, 16 BWG | 3.30 | 6.60 | 9.91 |
| 25.4 mm OD, 14 BWG | 4.14 | 8.28 | 12.42 |
Available Sizes, Dimensions and Tolerances
Copper Nickel Heat Exchanger Tubes are ordered by OD, wall and length. The chart above covers the OD sizes that TEMA exchangers use most, and other sizes can be quoted on request. ASTM B111 and EN 12451 set OD, wall and length tolerances by size and temper, and tubes can be ordered by minimum wall or by average wall. A tight OD matters because the tube must expand evenly into the tubesheet hole.
Designers also need the inside diameter and flow area, which set tube-side velocity. The table calculates both from OD and wall.
| OD (mm) | BWG | Wall (mm) | Inside diameter (mm) | Flow area per tube (mm²) |
|---|---|---|---|---|
| 19.05 | 18 | 1.24 | 16.57 | 216 |
| 19.05 | 16 | 1.65 | 15.75 | 195 |
| 19.05 | 14 | 2.11 | 14.83 | 173 |
| 25.4 | 18 | 1.24 | 22.92 | 413 |
| 25.4 | 16 | 1.65 | 22.10 | 384 |
| 25.4 | 14 | 2.11 | 21.18 | 352 |
| 31.75 | 18 | 1.24 | 29.27 | 673 |
| 31.75 | 16 | 1.65 | 28.45 | 636 |
| 31.75 | 14 | 2.11 | 27.53 | 595 |
| 38.1 | 18 | 1.24 | 35.62 | 997 |
| 38.1 | 16 | 1.65 | 34.80 | 951 |
| 38.1 | 14 | 2.11 | 33.88 | 902 |
Tell us the OD tolerance, wall basis and length tolerance your tubesheet needs, and we will quote against them.
Copper Nickel Heat Exchanger Tubes Common Materials
These are the materials most commonly specified by Copper Nickel Heat Exchanger Tubes Suppliers for marine, offshore, power and industrial heat-exchanger applications.
C70600 (90/10 Copper Nickel): Contains approximately 90% copper and 10% nickel, with controlled iron additions. It is widely used for condenser and heat-exchanger tubes handling seawater, brackish water and other cooling-water services.
C71500 (70/30 Copper Nickel): Contains approximately 70% copper and 30% nickel. Its higher nickel content makes it suitable for more demanding seawater, cooling-water and marine heat-exchanger applications.
C71640: A 70/30 copper-nickel alloy with controlled iron and manganese additions. It is commonly selected for demanding naval, offshore and marine heat-exchanger service where enhanced resistance to flowing seawater is required.
Copper Nickel Heat Exchanger Tubes We Manufacture and Supply
We make Copper Nickel Heat Exchanger Tubes for several exchanger types. The alloy and temper follow the duty.
| Exchanger type | Alloy | Temper and form |
|---|---|---|
| Surface steam condensers | C70600, C71500 | Light-drawn, straight, long lengths |
| Fixed tubesheet shell and tube coolers | C70600 | Light-drawn, straight |
| U-tube coolers and heaters | C70600, C71500 | Annealed, U-bend |
| Desalination evaporators and heaters | C70600, C71500 | Light-drawn, straight |
| Oil and lube coolers | C70600 | Annealed or light-drawn |
Applications of Copper Nickel Heat Exchanger Tubes
- Power plants: Seawater-cooled steam condensers and auxiliary coolers on coastal stations.
- Shipbuilding and marine: Central coolers, oil coolers and engine heat exchangers.
- Desalination plants: Evaporators, brine heaters and condensers.
- Offshore platforms: Seawater-cooled process and utility coolers.
- Oil and gas: Gas coolers and produced-water coolers on decks and terminals.
- Chemical and petrochemical plants: Seawater-cooled process coolers and condensers.
- Pharmaceutical plants: Utility cooling water exchangers outside the product-contact zone.
- Coastal EPC projects: Seawater-cooled chillers and heat pumps.
Why Choose Us as Your Copper Nickel Heat Exchanger Tubes Manufacturer in India?
With manufacturing and supply experience since 2005, we understand the quality, dimensional and documentation requirements of heat-exchanger, marine, offshore and industrial projects. Our team has expertise in supplying copper nickel tubes in grades such as C70600, C71500 and C71640 for different applications.
We can manufacture and export up to 100 tons per month, depending on the grade, size and order requirements. As a trusted Copper Nickel Heat Exchanger Tubes Supplier in India, we support customers with consistent production, export documentation and specification-based supply.
Our quality systems include ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018 certifications. Every order is supplied with an EN 10204 3.1 certificate, while 3.2 certification and third-party inspection can be arranged on request. With our export office in Mumbai, we serve customers in 85+ countries and handle both domestic and international supply requirements.
Countries We Export Copper Nickel Heat Exchanger Tubes To
We export Copper Nickel Heat Exchanger Tubes from India to customers across 85+ countries, supporting requirements for marine, offshore, power, desalination and industrial heat-exchanger projects. Our Mumbai export office coordinates international orders, documentation and shipping based on the destination and buyer requirements.
Our export markets include the United States, United Kingdom, Germany, France, Italy, Spain, Netherlands, Norway, Sweden, Denmark, Poland, Saudi Arabia, United Arab Emirates, Qatar, Oman, Kuwait, Bahrain, South Africa, Egypt, Nigeria, Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia and New Zealand, along with other international destinations.
Copper Nickel Heat Exchanger Tubes FAQs
Common questions about copper nickel heat exchanger tube alloys, wall selection, seawater velocity, tubesheets, and supply.
Which alloy should I choose, 90/10 or 70/30?
Pick 90/10 for normal seawater service and cost-sensitive jobs. Pick 70/30 for warm water, faster tube-side flow, polluted harbours or critical duty.
How do I choose the tube wall?
A thinner wall passes heat faster but leaves less margin for wear and handling. Exchanger designers balance heat transfer, pressure and corrosion allowance, and then pick a BWG gauge.
What tube-side velocity can copper nickel handle?
As a design guide, 90/10 handles seawater up to about 2.5 m/s and 70/30 up to about 3.0 m/s. Higher speeds can wear the protective film, so your designer should set the limit for the case.
How does the protective film form?
In clean, aerated seawater, a thin film builds on the tube surface over the first weeks and months. Clean water at start-up helps, and polluted water during that period can leave a poorer film.
How should I clean copper nickel tubes?
Use soft brushes or sponge balls. Avoid harsh abrasives, and follow your plant's cleaning procedure, since overcleaning removes the protective film.
Which tubesheet material should I use?
Common choices are copper-nickel, naval brass or clad plate, selected to limit galvanic attack. Your exchanger designer should match the tubesheet to the water and the tube alloy.
Can the tubes be expanded into a tubesheet?
Yes. Annealed and light-drawn copper nickel tubes expand well. Use a qualified rolling procedure, and keep tubesheet hardness and hole finish within the exchanger specification.
Can you supply U-bend tubes?
Send your drawing with the bend radius and leg length, and we will confirm what can be made and what temper applies. Straight tubes in standard sizes are the quickest to supply.
What sizes can I order?
The chart above covers OD 15.88 to 50.8 mm in 20, 18, 16 and 14 BWG walls. Other sizes and walls can be quoted on request.
How do I calculate the weight of a tube 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.
What affects the price of Copper Nickel Heat Exchanger Tubes?
Alloy is the biggest factor, since copper and nickel prices move the cost, and 70/30 costs more than 90/10. OD, wall, temper, length, U-bending, testing, inspection, quantity and freight also count.
Which certificates come with the tubes?
Each order carries an EN 10204 3.1 certificate showing chemistry and mechanical results. A 3.2 certificate and third-party inspection are available on request.
Is every tube tested before it ships?
ASTM B111 requires an eddy current test or a hydrostatic test on each tube. Tell us your preferred test when you enquire.
Are you a manufacturer or a supplier of Copper Nickel Heat Exchanger Tubes?
We are both. We manufacture near Mumbai and supply ready stock of popular sizes from the same location, subject to availability.
Do you export Copper Nickel Heat Exchanger Tubes, and how are they packed?
Yes. We ship to 85+ countries from our Mumbai export office, and we pack the tubes to suit sea or air freight and your project needs.