Copper nickel products, also sold as cupro nickel, are the standard choice for seawater piping, and Aashish Metals is a supplier and exporter of 90/10 and 70/30 pipes, tubes, round bars, fittings, fasteners and valves from Mumbai, India. Copper nickel resists saltwater corrosion, discourages marine growth on its surface and stays easy to fabricate, so it keeps working long after plain steel and brass have failed.
Every order ships with heat numbers and mill test certificates, and we cut to your drawing so material arrives ready to fabricate. Not sure if you require 90/10 or 70/30? Then just tell us about your situation and we will help you determine what you need. Send us your requirement and we will quote within [24 hours].
Copper Nickel Products in India
Instrumentation Ball Valves
Threaded Fittings
Socket Weld Fittings
Cupro Nickel Pipes, Tubes, Bars, Fittings, Fasteners & Valve
Copper nickel pipes and tubes
The workhorse of marine piping. Copper nickel pipe and tube carry seawater, cooling water and fire-fighting lines with very little maintenance. See 90/10 copper nickel pipes and tubes and 70/30 copper nickel pipes and tubes, including UNS C70600 and C71500 pipe.
Copper nickel round bars
Machined into shafts, bushes, pump parts and valve components that live in seawater. Choose 90/10 round bars or 70/30 round bars, cut to length.
Copper nickel pipe fittings
Elbows, tees, reducers and caps for welded systems: 90/10 pipe fittings and 70/30 pipe fittings. For small-bore lines, we also stock 90/10 socket weld fittings and 90/10 threaded fittings, with 70/30 socket weld fittings and 70/30 threaded fittings.
Copper nickel tube fittings
Leak-tight compression fittings for instrument, sampling and hydraulic lines: 90/10 tube fittings and 70/30 tube fittings.
Copper nickel fasteners
Bolts, studs, nuts and washers that match the corrosion behaviour of the pipework, so joints do not become the weak point: 90/10 fasteners and 70/30 fasteners.
Copper nickel instrumentation valves
Needle, manifold and ball valves for gauge and transmitter lines in seawater service. Browse the 90/10 needle valves, 90/10 manifold valves, 90/10 ball valves and the 70/30 needle valves, 70/30 manifold valves and 70/30 ball valves.
Plates, sheets, strip and wire
Copper nickel plate, sheet, strip and wire in 90/10 and 70/30 are supplied to order. Send thickness, width and quantity and we will confirm lead time.
Technical Data
Hastelloy Products Forms and Grades
| Product form | C276 | C22 | B2 | Typical use |
|---|---|---|---|---|
| Pipes and tubes | Yes | Yes | On request | Process piping, heat exchangers |
| Round bars | Yes | Yes | Yes | Shafts, valve trim, machined parts |
| Sheets and plates | Yes | Yes | On request | Vessels, linings, scrubbers |
| Pipe fittings (butt weld) | Yes | Yes | On request | Pipe routing |
| Socket weld and threaded fittings | Yes | Yes | On request | Small-bore lines |
| Flanges | Yes | Yes | On request | Joints on high-pressure lines |
| Fasteners | Yes | Yes | On request | Flange bolting |
| Tube fittings and valves | Yes | Yes | On request | Instrumentation and sampling |
Why Engineers Choose Hastelloy Over Stainless Steel
Hastelloy is a family of nickel-based alloys, not one metal. Nickel gives the base its toughness, molybdenum defends against reducing acids, and chromium handles oxidizing conditions. The combination is why one alloy can survive process streams that corrode 316L stainless steel rapidly.
| Feature | What it means for your plant |
|---|---|
| Outstanding pitting and crevice resistance | Fewer leaks at gaskets, flange faces and weld heat-affected zones in chloride-rich media |
| High resistance to chloride stress corrosion cracking | Reliable service in seawater, brine and hot chloride process streams |
| Handles both oxidizing and reducing acids | One alloy for mixed or upset conditions, such as hydrochloric, sulphuric, nitric and formic acid |
| Excellent weldability | Low-carbon chemistry resists grain-boundary precipitation, so C276 and C22 welded parts can usually be used without post-weld annealing. B2 is different: solution-anneal it after welding. |
| Retains strength at temperature | Keeps useful strength at elevated temperature. Check the design temperature limit for your grade and code in the ASME allowable stress tables. |
| Long service life | Lower shutdown frequency and lifetime cost, even when the upfront price is higher |
Hastelloy C276, C22 and B2 Chemical Composition (% by weight)
| Element | Hastelloy C276 (UNS N10276) | Hastelloy C22 (UNS N06022) | Hastelloy B2 (UNS N10665) |
|---|---|---|---|
| Nickel (Ni) | Balance (about 57) | Balance (about 56) | Balance (about 69) |
| Molybdenum (Mo) | 15.0 – 17.0 | 12.5 – 14.5 | 26.0 – 30.0 |
| Chromium (Cr) | 14.5 – 16.5 | 20.0 – 22.5 | 1.0 max |
| Iron (Fe) | 4.0 – 7.0 | 2.0 – 6.0 | 2.0 max |
| Tungsten (W) | 3.0 – 4.5 | 2.5 – 3.5 | – |
| Cobalt (Co) | 2.5 max | 2.5 max | 1.0 max |
| Carbon (C) | 0.01 max | 0.015 max | 0.02 max |
| Manganese (Mn) | 1.0 max | 0.50 max | 1.0 max |
| Silicon (Si) | 0.08 max | 0.08 max | 0.10 max |
| Phosphorus (P) | 0.04 max | 0.02 max | 0.04 max |
| Sulphur (S) | 0.03 max | 0.02 max | 0.03 max |
| Vanadium (V) | 0.35 max | 0.35 max | – |
Hastelloy Physical and Mechanical Properties
| Property | C276 | C22 | B2 |
|---|---|---|---|
| Density | 8.89 g/cm³ | 8.69 g/cm³ | 9.22 g/cm³ |
| Melting range | 1325 – 1370 °C | 1357 – 1399 °C | 1330 – 1380 °C |
| Tensile strength (min) | 690 MPa | 690 MPa | 760 MPa |
| Yield strength 0.2% (min) | 283 MPa | 310 MPa | 350 MPa |
| Elongation (min) | 40% | 45% | 40% |
| Werkstoff number | 2.4819 | 2.4602 | 2.4617 |
| Modulus of elasticity | 205 GPa | 206 GPa | 217 GPa |
| Thermal conductivity (at 100 °C) | 10.2 W/m·K | 10.1 W/m·K | 11.1 W/m·K |
| Mean thermal expansion (20–100 °C) | 11.2 µm/m·K | 12.4 µm/m·K | 10.3 µm/m·K |
Values are typical for solution-annealed plate. Exact limits vary by product form and specification, so always confirm against the mill test certificate.
ASTM Standards for Hastelloy Pipes, Plates, Bars and Fittings
| Product | ASTM specification |
|---|---|
| Seamless pipe and tube | ASTM B622 |
| Welded pipe and tube | ASTM B619 / B626 |
| Plate, sheet and strip | ASTM B575 / B582 |
| Round bar and rod | ASTM B574 (C276, C22) / ASTM B335 (B2) |
| Forged flanges and fittings | ASTM B564 |
| Butt weld fittings | ASTM B366 |
| Dimensions | ASME B16.5, B16.9, B16.11, B36.19M |
| Fasteners | Machined from ASTM B574 bar (C276, C22); dimensions to ASME B18.2.1 / B18.2.2 [confirm] |
Hastelloy Products Applications
| Industry | Typical Hastelloy applications | Usual grade |
|---|---|---|
| Chemical and petrochemical | Reactors, agitators, heat exchangers, acid transfer lines, valves | C276, C22 |
| Oil and gas | Sour-service piping, wellhead parts, downhole tubing, risers | C276 |
| Pollution control | Flue gas desulphurisation scrubbers, ducting, stack liners | C276, C22 |
| Pharmaceutical and fine chemicals | Reactor vessels, filters, process piping handling chlorides | C22, C276 |
| Pulp and paper | Bleaching towers, digesters, washers | C276 |
| Power generation | Condenser tubes, FGD systems, waste-to-energy boilers | C276, C22 |
| Marine and desalination | Seawater piping, heat exchangers, evaporators | C276 |
| Hydrochloric acid processing | Evaporators, pumps, piping in hot, concentrated service | B2 |
| Aerospace and gas turbines | Combustor liners, ducting, exhaust parts | Hastelloy X |
Hastelloy C276 vs C22 vs B2 vs 316L Stainless Steel
Many buyers land on our page searching for "hastelloy c22 vs c276", so this table answers the question directly.
| Criteria | Hastelloy C276 | Hastelloy C22 | Hastelloy B2 | 316L stainless |
|---|---|---|---|---|
| Base | Ni-Mo-Cr-W | Ni-Cr-Mo-W | Ni-Mo | Fe-Cr-Ni-Mo |
| Best in | Reducing and mixed acids, wet chlorine, seawater | Oxidizing and mixed media, strongest all-rounder | Pure reducing acids (HCl) | Mild, low-chloride service |
| Oxidizing acid resistance | Good | Excellent | Poor | Fair |
| Reducing acid resistance | Excellent | Very good | Excellent | Poor |
| Chloride pitting resistance | Excellent | Excellent | Not recommended | Limited |
| Weldability | Excellent | Excellent | Good (needs care) | Excellent |
| Relative cost | High | High | High | Low |
Which one should you choose? Pick C276 for general-purpose chemical and marine work, C22 when oxidizing agents or hot chloride mixes are present, and B2 only for clean reducing acid such as hydrochloric. If your stream is milder, you may be able to save money with stainless steel, duplex or Alloy 20. If you need a nickel alternative for heat or seawater, compare with Inconel, Monel or titanium. Our full nickel alloy range covers every option.
Certified Hastelloy Material You Can Trace
| Document or standard | What it covers |
|---|---|
| Mill test certificate, EN 10204 3.1 | Heat number, chemistry and mechanical results |
| EN 10204 3.2 (on request) | Certificate countersigned by an independent inspector |
| PMI report | On-site check of alloy composition |
| NACE MR0175 / ISO 15156 | Sour-service suitability, where specified |
| ASTM / ASME specifications | B622, B619, B626, B575, B574, B564, B366, B16.5, B16.9 |
| Third-party inspection | Arranged with your nominated agency |
| [Your company certifications] | [Add ISO 9001 or other registrations you hold, and only if they are current] |
How We Make Sure You Get the Right Copper Nickel Grade
A 90/10 pipe and a 70/30 pipe can look identical, so we build checks into every step rather than trusting appearances.
flowchart LR
A[Your enquiry] –> B[Grade and spec check]
B –> C[Sourcing from approved mills]
C –> D[Incoming inspection]
D –> E[Cutting and preparation]
E –> F[Final check and packing]
F –> G[Dispatch with MTC]
- Grade and spec check. We confirm the alloy (C70600 or C71500), standard and dimensions before quoting.
- Approved sourcing. Material comes from reputable mills with traceable heat numbers.
- Incoming inspection. We check dimensions, surface and markings, and use positive material identification (PMI) to confirm the copper-to-nickel ratio.
- Cutting and preparation. Sawing, bevelling or machining to your drawing, with clean tools so the alloy is not contaminated by steel or sulphur-bearing oils..
- Testing on request. Hydrostatic, eddy current, flattening or flaring tests and other checks as your specification requires.
- Packing and dispatch. Export-grade packing, marked with grade and heat number, and complete paperwork.
Copper Nickel Products FAQ’s
Copper nickel, also called cupro nickel, CuNi or Cu-Ni, is a copper alloy containing 10% to 30% nickel, plus small amounts of iron and manganese. It is best known for resisting seawater corrosion and marine fouling, which is why it dominates ship and offshore piping.
90/10 has about 10% nickel and 70/30 has about 30%. The 70/30 grade is stronger and copes better with hot, fast or polluted water, while 90/10 costs less and conducts heat better. For most seawater piping, 90/10 is the practical choice.
Copper-nickel is widely used in marine, offshore, shipbuilding, power generation, desalination and heat-exchanger applications. Its excellent resistance to seawater corrosion, biofouling and erosion makes it suitable for seawater piping, condenser tubes, heat exchangers and marine cooling systems. Common grades include Cu-Ni 90/10 and Cu-Ni 70/30.
C70600 is the UNS number for 90/10 copper nickel, and C71500 is the number for 70/30. Buyers searching for “c70600 pipe” or “alloy c71500” are usually looking for these two grades in ASTM B466 pipe and tube.
Yes. Copper nickel welds well by TIG (GTAW) and MIG (GMAW) using a matching filler such as ERCuNi, and it can also be brazed. Clean the joint thoroughly, keep it free of sulphur and lead contamination, and avoid excess heat input.
Price depends on grade, product form, size, quantity and the current copper and nickel rates, so it moves regularly. The 70/30 grade costs more than 90/10 because of its higher nickel content. Send us your requirement for a quote at live market rates.
No. Monel 400 is a nickel-copper alloy with roughly 65% nickel and 30% copper, while cupro nickel is mostly copper. Monel is stronger and handles acids better but costs a lot more. See our Monel products if your service needs it.
No. Nickel silver contains zinc and is used for decorative items, musical instruments and electrical contacts, not for marine piping. It is not a substitute for cupro nickel in seawater lines.
Looking for Copper Nickel Pipes, Tubes or Fittings? Get Your Quote Today
Tell us the grade (90/10 or 70/30), product form, size and quantity, and we will send pricing and availability, usually within [24 hours]. Unsure which grade suits your line? Share the fluid, temperature and flow rate, and our team will help you decide.
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