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Copper nickel pipe, Cuni pipe, most people call. it is basically copper with nickel alloyed in, either around 10% or 30%, plus a bit of iron and manganese to help it hold up. The whole point of it is seawater. Put plain steel or even 316 stainless in a seawater line and it'll eventually pit or foul; copper nickel just doesn't, which is why it's the default choice for ship hulls, desalination plants and offshore cooling systems. It's covered by ASTM B466 / ASME SB466, comes as 90/10 (C70600) for general marine duty or 70/30 (C71500) when the flow's faster or the service is tougher.
1/8″ – 24″ NB
Ex-stock in every gauge, cut to your length
ASTM B466 / ASME SB466
Dual-certified, mill-traceable every heat
90/10 & 70/30 (C70600/C71500)
Copper Nickel Alloy Pipe, full range
SCH 5S – SCH 80S
Every gauge, ready to cut
Cuni Seamless & Welded
Single-vendor supply for seamless and welded runs
EN 10204 3.1 / 3.2
Third-party verified on request
Same-Day Stock Confirmation
Know availability before lunch, not next week
No Order Too Small
A single pipe length gets the same attention as a container
Alloy Verified In-House
PMI-checked before it ever reaches your truck
Quoted Straight From The Mill
No layered margins between you and the source
Paperwork Ready Before Pickup
MTC and export docs sorted, not chased later
Trusted Across 60+ Countries
Repeat buyers on four continents, not a one-time sale
📌 Table of Contents
Copper Nickel Pipe Manufacturer In India Backed By Verified ASTM B466 Code With MTC. Sourcing Copper Nickel Pipe usually means chasing three separate vendors – one for stock, one for testing, one for paperwork. We built our desk to close that gap: real inventory on the floor, an in-house lab that checks every coil, and export documentation that's ready before your truck arrives, not promised for "next week."
That's what makes us a dependable Copper Nickel Pipe Supplier In India for shipbuilders, EPC contractors and desalination plants, buyers who can't afford a vague delivery date or a surprise on the MTC.Whether it's a single retrofit line or a multi-container project, we operate as a Copper Nickel Pipe Exporter built for buyers who reorder, not for one-time transactions.
Most enquiries stall on the same three questions: is it really in stock, will the mill paperwork match what's shipped, and can the desk actually hold a price for more than a day. We answer all three upfront, before you have to ask. Every coil that leaves our yard has already been through PMI checks, so the material you receive is the material you were quoted – no last-minute substitution, no chasing a revised MTC after dispatch.
Repeat buyers stay for the same reason: a straight answer on lead time, a fair price the first time, and someone on the desk who picks up the phone when a shipment needs to move fast.
We are an established Copper Nickel Pipe Stockist In Mumbai, holding 90/10 and 70/30 Cuni ready in every size and schedule.
Mill-direct sourcing from Wieland means every heat is traceable, right down to the cut you receive.
Each type below ships ex-stock in standard sizes, with custom cuts available on request.
The governing code for Copper Nickel Pipe is ASTM B466 (seamless) and ASTM B467 (welded), with ASME SB466 as the pressure-piping equivalent for boiler and mechanical construction.
Every profile is PMI-verified before dispatch, so the spec sheet always matches what lands on your dock.
Formula: Weight (kg/m) = 0.0280 × Wall Thickness (mm) × (OD – Wall Thickness) (mm) — based on Cuni density ≈8.9 g/cm³
| Outside diameter of pipe | EEMUA 144 | |||||
|---|---|---|---|---|---|---|
| 16 bar | 20 bar | |||||
| ØD | Wall | Theoretical | Wall | Theoretical | ||
| thickness | weight | thickness | weight | |||
| nominal | actual | actual | actual | |||
| inch | ND | mm | mm | Kg/m | mm | Kg/m |
| 10 | 250 | 267 | 4.5 | 33.18 | 5.5 | 40.39 |
| 1.5 | 40 | 44.5 | 2.5 | 2.95 | 2.5 | 2.95 |
| 28 | 700 | 711 | 12 | 235.58 | 15 | 293.22 |
| 0.25 | 12 | 1 | 0.31 | 1 | 0.31 | |
| 6 | 150 | 159 | 3 | 13.14 | 3.5 | 15.29 |
| 2 | 50 | 57 | 2.5 | 3.83 | 2.5 | 3.83 |
| 0.75 | 20 | 25 | 2 | 1.3 | 2 | 1.3 |
| 16 | 400 | 419.1 | 7 | 81 | 9 | 103.64 |
| 1 | 25 | 30 | 2.5 | 1.93 | 2.5 | 1.93 |
| 20 | 500 | 508 | 8.5 | 119.24 | 11 | 153.54 |
| 0.125 | 10 | 1 | 0.26 | 1 | 0.26 | |
| 36 | 900 | 914 | 15.5 | 391.14 | 19 | 477.6 |
| 3 | 80 | 88.9 | 2.5 | 6.07 | 2.5 | 6.07 |
| 0.38 | 10 | 16 | 2 | 0.79 | 2 | 0.79 |
| 14 | 350 | 368 | 6.5 | 65.99 | 8 | 80.89 |
| 1.25 | 32 | 38 | 2.5 | 2.5 | 2.5 | 2.5 |
| 32 | 800 | 813 | 13.5 | 303.14 | 17 | 380.06 |
| 7 | 175 | 193.7 | 3 | 16.07 | 3.5 | 18.7 |
| 5 | 125 | 133 | 3 | 10.95 | 3 | 10.95 |
| 0.5 | 15 | 20 | 2 | 1.01 | 2 | 1.01 |
| 18 | 450 | 457.2 | 8 | 100.93 | 9.5 | 119.45 |
| 24 | 600 | 610 | 10.5 | 176.79 | 13 | 217.97 |
| 12 | 300 | 323.9 | 5.5 | 49.18 | 7 | 62.3 |
| 2.5 | 65 | 76.1 | 2.5 | 5.17 | 2.5 | 5.17 |
| 8 | 200 | 219.1 | 4 | 24.17 | 4.5 | 27.12 |
| 4 | 100 | 108 | 3 | 8.85 | 3 | 8.85 |
Need an exact figure for a non-standard OD/WT? Our weight calculator covers copper alloys too – or send us your size list for a ready sheet.
Enter OD and wall thickness for an instant per-metre weight, any grade, any size.
No middleman markup – our rate card tracks the LME feed so your quote stays honest.
Copper Nickel Pipe Price moves with LME copper and nickel, so we quote fresh against the daily metal price. Being a Copper Nickel Pipe Stockist In Mumbai lets us track those swings closely and avoid handing out a stale rate card.
Base metal cost drives 60–70% of the quote
70/30 costs more due to higher nickel content
A thicker schedule pushes up the per-length weight
Seamless carries a premium over welded pipe
3.2 third-party inspection adds to lead time and cost
Full-coil or container orders unlock better per-kg rates
| Grade | Form | Indicative Price Band (₹/kg) |
|---|---|---|
| 90/10 (C70600) | Seamless Pipe | ₹850 – ₹1,050 |
| 90/10 (C70600) | Welded Pipe | ₹720 – ₹900 |
| 70/30 (C71500) | Seamless Pipe | ₹1,050 – ₹1,300 |
| 70/30 (C71500) | Welded Pipe | ₹920 – ₹1,150 |
Rates shift daily with LME – treat this as a planning guide and confirm same-day pricing with our desk before you commit a PO.
WPS documentation is prepped alongside the coil, so your fabricator never waits on paperwork.
Cuni Pipe is most reliably joined by GTAW welding with matching filler, or by silver brazing for smaller-bore tube runs.
Degrease, no wire-brush contamination from steel tools
ERCuNi wire for GTAW; BAg-series rod for brazing
Low, steady heat – avoid overheating the Ni-Fe matrix
Argon root purge to stop internal oxide scale
Dye penetrant or radiography before dispatch
As a certified Copper Nickel Pipe Manufacturer In India, we share tested WPS references with every export order – ask our desk for the grade-specific sheet.
| Outside diameter of pipe | Wall thickness | Theoretical weight | ||||
|---|---|---|---|---|---|---|
| ØD | ||||||
| nominal inch | actual inch | actual mm | actual inch | actual mm | Lb/Ft | Kg/m |
| 3 | 3.500 | 88.90 | 0.120 | 3.05 | 4.33 | 6.45 |
| 0.75 | 1.050 | 26.67 | 0.083 | 2.11 | 0.86 | 1.28 |
| 10 | 10.750 | 273.05 | 0.165 | 4.19 | 18.65 | 27.78 |
| 1.25 | 1.660 | 42.16 | 0.109 | 2.77 | 1.81 | 2.70 |
| 0.125 | 0.405 | 10.29 | 0.049 | 1.24 | 0.19 | 0.28 |
| 6 | 6.625 | 168.30 | 0.134 | 3.40 | 9.29 | 13.84 |
| 2 | 2.375 | 60.32 | 0.109 | 2.77 | 2.64 | 3.93 |
| 0.5 | 0.840 | 21.34 | 0.083 | 2.11 | 0.67 | 1.00 |
| 12 | 12.750 | 323.90 | 0.180 | 4.57 | 24.17 | 36.00 |
| 3.5 | 4.000 | 101.60 | 0.120 | 3.05 | 4.97 | 7.40 |
| 0.38 | 0.675 | 17.15 | 0.065 | 1.65 | 0.42 | 0.63 |
| 5 | 5.563 | 141.30 | 0.134 | 3.40 | 7.77 | 11.57 |
| 1.5 | 1.900 | 48.27 | 0.109 | 2.77 | 2.09 | 3.11 |
| 0.25 | 0.540 | 13.72 | 0.065 | 1.65 | 0.33 | 0.49 |
| 8 | 8.625 | 219.10 | 0.148 | 3.76 | 13.40 | 19.96 |
| 1 | 1.315 | 33.40 | 0.109 | 2.77 | 1.40 | 2.09 |
| 4 | 4.500 | 114.30 | 0.120 | 3.05 | 5.61 | 8.36 |
| 2.5 | 2.875 | 73.03 | 0.120 | 3.05 | 3.53 | 5.26 |
The number that actually matters here is nickel. 90/10 sits around 9-11% Ni and covers most seawater cooling duty at a lower price point. Push up to 70/30's 29-33% Ni and you get noticeably better resistance to erosion-corrosion at higher flow velocities — that's really the only reason to pay more for it. Iron content moves the other way: 90/10 carries more (1.0-1.8%) than 70/30 (0.4-1.0%), which is part of what gives 90/10 its own resistance edge at the lower nickel level.
Beyond strength, buyers size heat exchangers and cooling lines around these physical constants.
8.9 g/cm³ (90/10) – 8.95 g/cm³ (70/30)
1100–1145°C (90/10) – 1170–1240°C (70/30)
≈45 W/m·K (90/10) – ≈29 W/m·K (70/30) at 20°C
≈9% IACS (90/10) – ≈4.6% IACS (70/30)
≈17.1 × 10⁻&sup6;/°C (20–300°C range)
Non-magnetic in the annealed condition
Keep design velocity under 2.4 m/s (90/10) to avoid erosion-corrosion
Higher pressure lines need a heavier schedule at the same OD
Add extra wall thickness where a long design life is expected
Move to 70/30 for higher-velocity or higher-temperature duty
Flanged, welded or brazed joints can each favour a different OD tolerance
Standard random lengths cut freight cost versus custom sizing
Cunifer Pipe (90/10 Cuni) has become the standard replacement for steel brake and fuel line tube on account of its corrosion life and ease of forming.
Immune to road salt and moisture pitting
Bends and flares without work-hardening cracks
No interference with vehicle sensor wiring
4.75mm/6mm/8mm/10mm coil, direct fit replacement
As a trusted Copper Nickel Pipe Supplier In India, we pack Cunifer brake tube coils ready for same-week dispatch.
Why does a seawater buyer pick Cuni Pipe over standard 316 stainless?
For seawater, brackish or desalination service, Copper Nickel Pipe outlasts stainless on total lifecycle cost even though the per-kg price runs higher – one more reason Aesteiron stands out as a genuine Copper Nickel Pipe Manufacturer In India, known for genuine stock, fast quotes and dependable service.
Relabelled or off-spec material is the biggest risk in copper alloy trading – run these checks before releasing payment.
Heat number on the MTC must match the pipe body marking
Positive Material ID confirms actual alloy content
Cross-check the UNS code against the grade ordered
Ask which mill melted and finished the material
Compare actual dispatch weight against the standard chart
Third-party witnessed testing for high-value orders
Every batch that leaves our line carries the documentation a serious Copper Nickel Pipe Exporter is expected to provide.
Continuous cast Cuni round bar
Pierced to hollow shell
Sized to final OD/WT
Stress relieved, surface cleaned
Hydro test, PMI, final QC
Regional stockists and stocking distributors buyers keep reordering from.
Victoria, Seychelles
Supplier of KME & Wieland Copper Nickel Pipe Supplier
Dakar, Senegal
Stocking Distributor for Luvata & Mueller Industries Cuni Pipe Distributor
Lagos, Nigeria
Authorised Stockist of Poongsan & KME Copper Nickel Pipe Stockist
Algiers, Algeria
Supplier of Wieland & Mandev Tubes Copper Nickel Seamless Pipe Supplier
Port Harcourt, Nigeria
Stockholder of Golden Dragon Cupro Nickel Pipe Stockholder
Baku, Azerbaijan
Stocking Distributor for Aurubis & Luvata Copper Nickel Pipe Distributor
Yerevan, Armenia
Supplier of KME Copper Nickel Alloy Pipe Supplier
Rabat, Morocco
Authorised Stockist of Mueller Industries Cuni Pipe Stockist
Cairo, Egypt
Stockholder of Wieland & Poongsan Copper Nickel Welded Pipe Stockholder
Johannesburg, South Africa
Stocking Distributor for Mandev Tubes & KME Copper Nickel Pipe Distributor
Casablanca & Tangier, Morocco
Supplier of Golden Dragon & Aurubis Copper Nickel Pipe Supplier
Addis Ababa, Ethiopia
Authorised Stockist of Luvata Copper Nickel Pipe Stockist
From seawater intakes to shipboard piping, buyers across every industry rely on us as their preferred Copper Nickel Pipe Supplier In India.
Seawater Cooling & Intake Systems
Desalination Plants (SWRO/MSF)
Marine & Shipbuilding Piping
Offshore Oil & Gas Platforms
Power Plant Condenser Tubing
Heat Exchanger Tube Bundles
Shipboard Potable Water Lines
Automotive Brake & Fuel Lines
A stockholder network that keeps container lead times predictable.
Mexico City, Mexico
Stocking Distributor for Mueller Industries Copper Nickel Pipe Distributor
Buenos Aires, Argentina
Authorised Stockist of Luvata & KME Cuni Pipe Stockist
São Paulo, Brazil
Stockholder of Wieland Copper Nickel Welded Pipe Stockholder
Lima, Peru
Supplier of Mueller Industries & Poongsan Copper Nickel Pipe Supplier
KME
Wieland
Mueller Industries
Luvata
Poongsan
Aurubis
Golden Dragon
6″ SCH 40S, seamless, PMI tested, EN 10204 3.1 MTC.
Power Utility Contractor, Nigeria
LAGOS, NIGERIA4″ SCH 80S, welded, bright annealed finish.
Shipyard Contractor, South Africa
JOHANNESBURG, SOUTH AFRICA8″ SCH 40S, seamless, hydro-tested.
Desalination Plant Operator, Egypt
CAIRO, EGYPT2″ SCH 40S, welded, alloy-verified, EN 10204 3.1 MTC.
Chemical Plant Contractor, Morocco
CASABLANCA, MOROCCO3″ SCH 40S, seamless, PMI verified.
Industrial Plant Contractor, Ethiopia
ADDIS ABABA, ETHIOPIA5″ SCH 80S, welded, EN 10204 3.1 MTC.
Shipyard Contractor, Argentina
BUENOS AIRES, ARGENTINAA copper-base alloy with 10% or 30% nickel plus small iron and manganese additions, covered by ASTM B466 in grades C70600 (90/10) and C71500 (70/30).
90/10 handles most seawater cooling and general marine duty at lower cost. 70/30 suits higher-velocity flow and harsher, longer-life service.
Yes, by GTAW with ERCuNi filler and an argon root purge. Smaller-bore tube is often silver brazed instead of welded.
HSN 7411 21, taxed at 18% GST in India.
Ex-stock sizes ship within 48 hours of order confirmation; indent or custom sizes typically take 6–8 weeks.
For seawater and brackish service, yes – it resists biofouling and chloride corrosion far better than 316 stainless, giving a longer service life despite a higher per-kg price.
Talk to India’s most responsive Copper Nickel Pipe Stockist In Mumbai – most RFQs get a firm quote in under two hours.
Why Aesteiron?
Tools & Downloads
Conclusion
When seawater corrosion and biofouling aren't an option, Copper Nickel Pipe delivers proven marine-grade reliability that stainless steel can't match. Certified to ASTM B466 / ASME SB466 and available in 90/10 and 70/30 grades, Seamless and Welded forms – that's why Aesteiron is the name buyers across India and export markets trust first for fast quotes and genuine stock.
Quick form – quote in 2 hours.
