If you're sourcing copper nickel tubes, cupro nickel pipe, or cupronickel tubing for a USA marine, industrial, or offshore project, you're working with one of the most corrosion-resistant alloy systems available for seawater and harsh-environment applications. Getting the grade, size, and construction right before you order is what separates a successful specification from a costly one.

Browse Dexters Sales Inc.'s full range of copper, cupro nickel, and brass tubes and pipes — serving industrial and marine buyers across the USA, including New York — and use this guide to make the right call the first time.

What Is Cupro Nickel? The Short Version

Cupronickel (also written cupro nickel or copper nickel, abbreviated CuNi) is a copper-based alloy containing between 2% and 45% nickel, with small additions of iron and manganese that enhance corrosion resistance and strength. The result is a material that combines copper's thermal conductivity and workability with nickel's exceptional resistance to seawater corrosion, biofouling, and stress corrosion cracking.

The two commercially dominant grades — 90/10 (C70600) and 70/30 (C71500) — cover the majority of USA marine and industrial applications. A third grade, C715, is the military specification equivalent widely used in US Navy and defense applications.

Cupro Nickel Grades — Which One Do You Need?

GradeUNSCompositionKey PropertiesBest Applications90/10C7060090% Cu, 10% Ni, + Fe/MnExcellent seawater corrosion resistance, good weldability, cost-effective Seawater piping, heat exchangers, condensers, shipbuilding, desalination 70/30C7150070% Cu, 30% Ni, + Fe/MnHigher strength and corrosion resistance than 90/10; superior in high-velocity seawater High-pressure marine systems, naval vessels, offshore platforms, power plant condensers C715C71500 / MIL-T-16420K70% Cu, 30% Ni (military spec)Meets US Navy MIL-T-16420K Class 200 and Class 700 pressure specifications US Navy shipboard piping, military marine applications, defense procurement 

90/10 cupro nickel is the most widely stocked and specified grade in the USA for general seawater and marine piping applications — it provides excellent corrosion resistance at a lower cost per foot than 70/30. 70/30 is specified where higher strength and performance in more aggressive marine and high-velocity flow environments are required. C715 and the associated military pressure classes (Class 50, Class 200, Class 700) are the standard for US Navy procurement.

Copper Nickel Pipe vs. Copper Nickel Tube — What's the Difference?

The same distinction applies here as with other specialty metals:

Copper nickel tubes are specified by outer diameter (OD) and wall thickness — standard for heat exchanger tubes, condenser tubes, instrumentation tubing, and precision mechanical applications. Available in seamless construction for highest pressure ratings and tightest tolerances.

Cupro nickel pipe is specified by nominal pipe size (NPS) and pressure class — the standard for USA fluid conveyance piping systems in marine, industrial, and offshore applications. US standard pressure classes are Class 50, Class 200, and Class 700 per MIL-T-16420K.

Both are available in seamless (Type I) and welded (Type II) construction:

Seamless copper nickel tube/pipe — No weld seam; highest pressure rating; standard for critical marine, naval, and offshore applications

Welded cupronickel pipe — More cost-effective for larger diameters (typically 14" OD and above per US standards); suitable for lower-pressure and structural applications

Copper Nickel Pipe Sizes — US Standards

Cupro nickel pipe dimensions in the USA follow ASTM B466 and MIL-T-16420K standards. Standard size range runs from 1/8" nominal to 24" nominal in seamless and welded construction:Nominal SizeOD (mm)Available Pressure Classes1/4"13.72 mmClass 200, Class 700 1/2"21.34 mmClass 200, Class 700 1"33.4 mmClass 200, Class 700 2"60.32 mmClass 200, Class 700 4"114.3 mmClass 200, Class 700 6"168.3 mmClass 200, Class 700 8"219.1 mmClass 200, Class 700 12"323.9 mmClass 50, Class 200 14"–20"355.6–508.2 mmSeamless or Welded, Class 50, Class 200 22"–24"558.8–609.6 mmWelded Type II 

Copper nickel tubes for heat exchanger and condenser applications follow ASTM B111 — available from small-bore sizes starting at 3/8" OD through larger industrial diameters.

Primary Applications in the USA

Marine and Naval Shipbuilding: Copper nickel tubes and pipe are the material of choice for seawater piping systems, fire suppression systems, ballast systems, bilge systems, and exhaust cooling systems on commercial and naval vessels across the USA. The 90/10 grade handles most commercial shipbuilding applications; 70/30 and C715 are standard for US Navy vessels.

Heat Exchangers and Condensers: Cupronickel tubing is a benchmark material for heat exchanger and condenser tube bundles in power plants, desalination systems, offshore platforms, and HVAC systems — the combination of high thermal conductivity and seawater corrosion resistance makes it the go-to for these applications in the USA.

Offshore Oil and Gas: Offshore platforms and subsea systems across the Gulf of Mexico and other USA offshore zones specify cupro nickel pipe and tube for seawater cooling, fire water systems, hydraulic control lines, and process piping where saltwater exposure is continuous.

Desalination Plants: Multi-stage flash (MSF) and reverse osmosis desalination facilities in the USA and globally use copper nickel tubes for their heat transfer efficiency and long service life in hot brine and seawater environments.

Power Generation: Coastal and nuclear power plants use cupronickel condenser tubes and heat exchanger tubes — particularly 70/30 grade — for cooling water systems where seawater or brackish water is the coolant medium.

Automotive and Defense: Cupro nickel tubing is used in hydraulic brake lines, automotive cooling systems, and military vehicle hydraulic systems — applications where corrosion resistance and pressure performance in compact tube formats matter.

Key Standards for USA Procurement

When ordering copper nickel tubes or cupro nickel pipe in the USA, confirm that products meet the applicable standard for your application:

ASTM B111 — Standard for copper alloy seamless condenser tubes and ferrule stock; primary standard for heat exchanger and condenser tubing

ASTM B466 — Standard for seamless copper-nickel pipe and tube; primary standard for piping applications

ASTM B467 — Standard for welded copper-nickel pipe

MIL-T-16420K — US military specification for copper-nickel pipe, Class 50 / Class 200 / Class 700; required for US Navy procurement

ASME SB-111 / SB-466 — ASME pressure vessel and piping code equivalents for ASTM B111 and B466

What to Look for in a CuNi Tube Supplier

For USA marine and industrial buyers, the right copper nickel tube supplier is not simply the one with the lowest price per foot:

Grade and construction availability: A reliable cupro nickel pipe supplier stocks both 90/10 (C70600) and 70/30 (C71500) grades in seamless and welded construction across the standard USA size range. Military spec C715 / MIL-T-16420K availability is essential for defense and naval procurement.

Certifications and mill test reports: Every order of copper nickel tube for sale should come with full mill test reports (MTRs) confirming grade, chemistry, and mechanical properties per ASTM B111, B466, or MIL-T-16420K as applicable. For US Navy procurement, third-party inspection and NAVSEA-approved testing may also be required.

Cut-to-length and processing: Suppliers offering cut-to-length, bevel, and custom processing reduce fabrication lead time and handling costs for project-based orders.

Location and lead time: For USA projects requiring fast turnaround — particularly in the New York, New Jersey, and Gulf Coast markets — local or regional stocking suppliers reduce lead time significantly versus overseas direct shipment.

Dexters Sales Inc. serves USA marine and industrial buyers from Brooklyn, NY — browse copper, cupro nickel, and brass tubes and pipes here.

Additional Resources

For more detailed coverage of cupro nickel pipe grades, properties, and USA sourcing:

👉 Cupro Nickel Pipe & CuNi Tubes — Dexters Sales Inc. USA

👉 Cupro Nickel Pipes & Tubes — CuNi Suppliers for USA Marine & Industrial

FAQs

What is cupro nickel pipe used for?

Cupro nickel pipe is used in seawater piping systems, marine vessels, offshore platforms, heat exchangers, condensers, desalination plants, power generation cooling systems, and hydraulic and brake line tubing.

What is the difference between 90/10 and 70/30 copper nickel?

90/10 (C70600) contains 90% copper and 10% nickel — excellent seawater corrosion resistance at lower cost, suitable for most commercial marine applications. 70/30 (C71500) contains 70% copper and 30% nickel — higher strength and better performance in high-velocity seawater and more aggressive environments; standard for US Navy and offshore applications.

What is C715 cupro nickel?

C715 is the common trade designation for 70/30 copper nickel (UNS C71500) manufactured to US military specification MIL-T-16420K — required for US Navy shipboard piping and defense procurement in Class 200 and Class 700 pressure ratings.

What standard governs copper nickel pipe sizing in the USA?

ASTM B466 covers seamless copper-nickel pipe; ASTM B467 covers welded; MIL-T-16420K covers military specification pipe in Class 50, 200, and 700. Sizes range from 1/8" to 24" nominal in the US standard.

Can I buy copper nickel tubes in New York?

Yes — Dexters Sales Inc. in Brooklyn, NY stocks and supplies copper nickel tubes and cupro nickel pipe for USA marine and industrial buyers.

What certifications should I request when buying cupronickel tubing?

Request full mill test reports (MTRs) per ASTM B111 for heat exchanger tubes, ASTM B466 for pipe, or MIL-T-16420K for military applications. Third-party inspection certification may be required for US Navy procurement.

Searching for reliable shell and tube heat exchangers, stainless steel pipes, copper nickel tubes, or specialty titanium and carbon steel tubing suppliers across the USA? From hands-on industry experience right here at Dextersalesinc, supporting engineers and purchasing managers for two decades, I’ve seen (and solved) almost every industrial piping and heat exchanger challenge you can imagine.

You can view our complete offering and product details on our main site Dextersalesinc.

Why Dextersalesinc? Trusted by Industry Leaders

Here’s something I tell colleagues over lunch—spec’ing industrial equipment isn’t just about picking a part number off the web. The difference between a smooth installation and a week of headaches often comes down to material quality, precision tolerances, and supplier responsiveness. At Dextersalesinc, our team knows the ins and outs of shell and tube heat exchangers, alloy tubes, and specialty piping that keep America’s most demanding plants running.

I’ve found engineers in power, chemical processing, pharmaceuticals, and marine industries return to us because we know the why behind every spec—like why copper nickel tubes are a go-to for seawater applications, or when to choose titanium tube suppliers over exotic stainless grades for corrosion resistance.

Core Products: Tubing, Piping & Heat Exchanger Expertise

Shell and Tube Heat Exchangers

Shell and tube heat exchangers are classic workhorses, efficiently transferring thermal energy between process fluids in hundreds of settings across the USA—from refinery condensers to HVAC chillers. We offer everything from standard off-the-shelf exchangers to custom-built units in U-tube, fixed tube, and floating head configurations that hit your exact sizing, flow, and pressure needs.

Custom materials: Choose carbon steel, copper nickel, titanium, or high-grade stainless construction

Meets/exceeds TEMA & ASME standards for safety and longevity

Engineering support: Not sure which tube bundle or baffle layout is best for your heat transfer rate? Our team’s got your back

If you want a practical deep dive into how Brooklyn’s process plants rely on shell & tube exchangers, this recent post Brooklyn’s Experts in Shell & Tube Heat Exchangers – Dexter Sales Inc. is a goldmine for real-world insight.

Stainless Steel Pipe & Tube

Stainless steel piping is everywhere—food-grade lines in dairy plants, high-pressure service in petrochemical units, sanitary systems in pharmaceuticals. We source and stock 304, 316, 321, and duplex grades across seamless and welded form, ensuring corrosion resistance and dependability.

Industrial, structural, and sanitary stainless steel pipe supply

Value-added services: cutting, threading, fabrication per spec

Nationwide shipping

Copper Nickel Tubes

If you’ve worked in marine, power-plant cooling, or desalination, you’ve probably run into copper nickel (cupronickel) tubing. These alloys (90/10 and 70/30) are legendary for seawater corrosion resistance, making them standard for condensers, heat exchangers, hydraulic lines, and chillers.

Copper-nickel seamless tubes to ASTM B466 and custom specs

Extensive stock for fast turnaround

Sourced for both new builds and urgent replacements

Titanium Tube Suppliers

Titanium tubes: the champion for highly corrosive or high-pressure applications. We support energy, aerospace, and specialty chemical operations with Grade 2, Grade 5, and other titanium alloy tubing, all with mill certificates and full traceability. Pick straight or U-bent formats, seamless or welded.

Lightweight, high strength, exceptional corrosion performance

Supplier relationships ensure consistent high purity

Custom cutting, prep, and quick ship for urgent needs

Carbon Steel Tubing Suppliers

For the backbone of industry, we cover carbon steel tube needs for structural, mechanical, fluid-handling, and engineered process work.

Round, square, rectangular carbon steel tubing

High-strength, low-alloy grades for demanding sectors

Full spectrum: mill-lengths or cut-to-size; seamless or ERW

For an overview of alloy and carbon steel pipe supply see Alloy & Carbon Steel Pipes Suppliers Guide.

Semantics: LSI & Supporting Keywords in Action

To maximize search visibility and match real-world engineer searches, we weave in these natural secondary and LSI terms:

tube bundle, exchanger baffles, high-pressure tubing, precision tubing, custom pipe fabrication, U-tube heat exchanger, process equipment supplier, condenser tubes, exotic alloys, seamless pipe supplier, corrosion-resistant piping

FAQs: Specifying Tubes, Pipes & Exchangers

What certifications do your piping and exchangers carry?

All products ship with full mill test certification and meet or exceed ASME, ASTM, TEMA, and ISO requirements for safety and performance.

Can you help with custom engineering or replacement tube bundles?

Yes. Our team specializes in tailored solutions—just share your process data, and we’ll match or design the right heat exchanger bundle for you.

Which materials should I pick for seawater service?

Usually, copper nickel or titanium. We’ll analyze your system for best price-performance and durability based on flow, salinity, and pressure.

How quickly can you ship replacement pipes and tubes?

Most common specs are in US stock for immediate shipment. Custom sizes or alloys are quickly sourced—just call us for real-world timing.

Bottom Line

From local Brooklyn operations to nationwide industrial projects, Dextersalesinc is the name you can trust for top-quality shell and tube heat exchangers, alloy and stainless steel pipes, copper nickel tubes, and titanium tubing. It’s not just about stock—it’s about expertise and knowing when the seemingly small details make all the difference. Let’s get your process up to spec—reach out today.

If there’s one material that keeps popping up in some of the toughest industrial and marine applications, it’s copper nickel pipes and tubes (often called CuNi tubes). At Dextersalesinc, we offer top-notch copper nickel tubing designed to withstand harsh environments while delivering consistent performance and durability.

What Makes Copper Nickel Tubes So Trusted?

Here’s the deal: copper nickel tubing is a strong alloy predominantly made from copper and nickel, sometimes mixed with small amounts of iron and manganese. This blend gives you remarkable corrosion resistance, especially in saltwater and chemical environments. So, if you’re working with seawater cooling, desalination plants, or offshore rigs, CuNi tubes are pretty much your go-to.

The beauty lies in its strength and light weight, combined with excellent thermal conductivity. That means copper nickel pipes make awesome heat exchangers, condensers, and marine piping—proof that strength and efficiency can come in the same package.

Where Are Copper Nickel Pipes Most Commonly Used?

Marine & Offshore: Copper nickel tubes are the backbone of seawater cooling systems on ships and offshore platforms. Their corrosion resistance means less maintenance and longer service life.

Heat Exchangers & Power Plants: These tubes handle heat stress like pros, making them ideal in cooling systems, boiler feedwater systems, and condensers where durability counts.

Automotive & Aerospace: Used in brake lines, fuel lines, and hydraulic tubing, copper nickel tubes bring long-lasting reliability under extreme conditions.

Oil & Gas: Offshore rigs and refineries rely on copper nickel pipes for their corrosion resistance in rough, chemical-heavy environments.

Desalination Plants: The biochemical properties of CuNi make it a preferred choice to prevent biofouling and maintain water purity.

What Are the Benefits of Choosing Copper Nickel Tubes?

Unmatched corrosion resistance in saltwater and harsh chemical environments.

Great thermal conductivity, which means efficient heat transfer in industrial systems.

Durable under mechanical stress, maintaining performance in high-pressure applications.

Resistant to biofouling, which reduces downtime and lowers long-term maintenance costs.

Easy to fabricate and weld, making installations straightforward and cost-effective.

Specific Grades: What’s C715 Cupro Nickel?

One of the materials we stock at Dextersalesinc is the C715 Cupro Nickel alloy, also known as copper-nickel 70/30. This variant contains about 70% copper and 30% nickel, offering a stronger and more corrosion-resistant option compared to the typical 90/10 grade. It’s used extensively in:

Offshore platforms

Chemical processing plants

High-pressure heat exchangers

It offers a balance of strength and corrosion resistance that’s hard to beat.

Why Buy Copper Nickel Tubes from Dextersalesinc?

We don’t just supply metal — we provide confidence. Our copper nickel pipes and tubes are:

Manufactured to meet industry and ASTM specifications.

Available in a range of sizes to fit your exact needs.

Backed by fast shipping and consistent quality control.

Supported by knowledgeable staff ready to help with your questions.

Whether you’re a marine engineer, power plant operator, or OEM manufacturer, Dextersalesinc is your trusted partner for copper nickel tubing solutions.

Need Copper Nickel Tubes in New York or Beyond?

If you’re searching for copper nickel tubes in New York, or anywhere in the U.S., Dextersalesinc is proud to be your premier supplier. We understand tight deadlines and demanding specs. That’s why we keep strong stock and ship quickly to keep your projects on track.

Learn More

Want extra insights on copper nickel tubing and their industrial uses? Check out these trusted resources:

Copper Nickel Pipes & Cupronickel Tubes Reliable Solutions

Allstarcarts Copper Nickel Tubing Blog

Ready to Order?

Visit us or reach out for a quote: Dextersalesinc Copper Nickel Tubes & Pipes

Email: [email protected] Phone: +1-800-555-9876

𝗖𝗼𝗽𝗽𝗲𝗿-𝗡𝗶𝗰𝗸𝗲𝗹 𝗧𝘂𝗯𝗲𝘀: 𝗕𝘂𝗶𝗹𝘁 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗦𝗲𝗮

In the demanding world of marine engineering, material choice of 𝗖𝗼𝗽𝗽𝗲𝗿-𝗻𝗶𝗰𝗸𝗲𝗹 𝘁𝘂𝗯𝗲𝘀 used in ship condensers offer more than just exceptional corrosion resistance — their bacteriostatic properties actively combat marine biofouling, reducing maintenance and enhancing system reliability.

Looking for copper nickel tubes and pipes that meet the demands of industrial applications? At Dexter Sales Inc., we offer premium cupro nickel tubing and piping solutions with tight tolerances, high corrosion resistance, and fast nationwide shipping—including New York and beyond.

Whether you're sourcing marine-grade coils or custom-cut cupro nickel pipes for a heat exchanger or condenser system, our inventory is built for durability, precision, and long-term performance.

Why Choose Copper Nickel Tubes?

This copper-nickel alloy excels in resisting corrosive damage, especially in environments exposed to saltwater and chemicals. That’s why industries like shipbuilding, desalination, power generation, and HVAC prefer cupro nickel pipes and tubes over conventional materials.

Here’s what makes them stand out:

Excellent resistance to seawater and biofouling

High thermal conductivity

Long service life with minimal maintenance

Compatibility with various industrial fittings

Non-magnetic and antimicrobial properties

Whether you're using them for condensers, coolers, or seawater piping systems, cupro nickel tubes are a reliable choice.

Our Product Range: Copper Nickel Tubes & Pipes

At Dexter Sales Inc., we supply a diverse range of cupro nickel tubing products tailored to your specifications. Our offerings include:

🔩 Cupro Nickel Tubes (70/30 & 90/10) Available in seamless, welded, and coil forms for high-pressure and marine applications.

🧰 Cupro Nickel Pipes High-strength options with excellent weldability, offered in both metric and imperial sizes.

📏 Tight Tolerance Copper Nickel Coils Perfect for heat exchangers, condensers, and industrial cooling systems where dimensional accuracy is critical.

🌎 Cupro Nickel Tubes in New York We serve multiple industries across the Northeast, ensuring timely delivery and local support for urgent industrial projects.

Need a custom size or quick quote? Contact us directly to speak with a copper nickel expert.

Built for Industry: Who Uses Our Cupro Nickel Tubes?

Our copper nickel tubes and pipes are trusted by industries such as:

Shipbuilding & Marine

Oil & Gas Refineries

Power Generation

Chemical Processing

HVAC and Industrial Cooling

If you're looking for cupro nickel tube manufacturers who understand industry needs, you're in the right place.

As detailed in this expert guide on copper nickel tubes, choosing the right supplier can greatly impact performance and system lifespan.

Why Dexter Sales Inc.?

We combine decades of supply chain expertise with a customer-first approach. Here's why professionals across the U.S. choose us:

✅ U.S.-Based Inventory – Fast shipping nationwide, including New York ✅ Choose from standard Cu-Ni grades like 70/30 and 90/10 to match your project needs. ✅ Custom Solutions – Cut-to-length tubing, coils, and pipe fitting assistance ✅ Quality Assurance – Strict dimensional checks and material traceability ✅ Responsive Support – Our team helps you find the exact product for your needs

What to Look for in Cupro Nickel Tube Manufacturers

When selecting a supplier, consider:

Material grade & specs (ASTM B111, B466)

Delivery capabilities & lead times

Certification and traceability

Customization options (coils, seamless, sizes)

As outlined by Copper.org’s copper-nickel material guide, Cu-Ni alloys are essential for marine, condenser, and offshore pipeline use—especially when reliability and lifespan are mission-critical.

Frequently Asked Questions (FAQs)

What are the most common grades of copper nickel tubes?

The most commonly utilized copper-nickel grades are 90/10 (C70600) and 70/30 (C71500). The 70/30 grade offers higher strength and corrosion resistance, ideal for demanding applications.

Do you deliver cupro nickel tubes in New York?

Yes! We serve customers across New York with fast shipping and inventory stocked for East Coast delivery needs.

What’s the difference between a copper nickel tube and pipe?

Tubes typically have tighter tolerances and are used in heat exchangers and condensers. They’re commonly used in fluid conveyance systems and load-bearing installations.

Can I get tight tolerance coils in copper nickel?

Absolutely. We offer tight tolerance copper nickel coils ideal for precision systems. Custom cut and bulk order options are available.

Is copper nickel suitable for marine use?

Yes, it’s one of the best alloys for marine environments due to its resistance to seawater corrosion and fouling.

Quick Summary

Dexter Sales Inc. is your trusted U.S. supplier of copper nickel tubes, pipes, and coils. From tight tolerance tubing to large-scale orders in New York, we deliver high-quality cupro nickel products that meet the needs of industrial, marine, and HVAC systems.