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Copper Alloys C71500 | Product Overview
Introduction To Copper Alloys C71500
MOKSH TUBES & FITTINGS LLP is a leading manufacturer, supplier, stockist, and exporter of Copper Nickel 70/30 (C71500) products. This alloy contains 70% copper and 30% nickel with added iron and manganese for enhanced strength and corrosion resistance. It is especially renowned for its superior resistance to seawater corrosion, biofouling, and stress corrosion cracking, making it a preferred material for marine, offshore, and heat exchanger applications.
Copper Alloys C71500, offers excellent mechanical properties, thermal stability, and weldability. It is non-magnetic and retains its strength and corrosion resistance even at elevated temperatures and high-pressure environments.
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Technical Specifications – Copper Nickel C71500 (Cu-Ni 70/30)
| Category | Details |
|---|---|
| Material | Copper Nickel 70/30 |
| UNS No. | C71500 |
| EN Equivalent | CW354H |
| ISO Designation | CuNi30Fe1Mn |
| Copper Content | ≥ 69 % |
| Nickel Content | 29 – 33 % |
| Iron Content | 0.4 – 1.0 % |
| Manganese | 0.4 – 1.0 % |
| Magnetic Properties | Non-Magnetic |
| Heat Treatable | ❌ No |
| Strength Control | Cold Working |
| Seawater Resistance | Excellent |
| Erosion / Cavitation | Very Good |
| Typical Service | Marine, Offshore, Heat Exchangers |
Chemical Composition – UNS C71500
| Element | Content (%) |
|---|---|
| Copper (Cu) | 69.0 min |
| Nickel (Ni) | 29.0 – 33.0 |
| Iron (Fe) | 0.4 – 1.0 |
| Manganese (Mn) | 0.4 – 1.0 |
| Zinc (Zn) | 1.0 max |
| Lead (Pb) | 0.05 max |
| Others | 0.50 max (total) |
Physical Properties – Copper Nickel C71500
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.94 g/cm³ | 0.323 lb/in³ |
| Melting Point | 1170 – 1240 °C | 2140 – 2264 °F |
| Electrical Conductivity | 7% IACS | — |
| Thermal Conductivity | 29 W/m·K | 200 BTU-in/hr-ft²-°F |
| Modulus of Elasticity | 140 GPa | 20.3 × 10⁶ psi |
Heat Treatment & Fabrication – C71500
| Process | Temperature Range | Purpose |
|---|---|---|
| Annealing | 700 – 900 °C | Restore ductility |
| Stress Relieving | 300 – 350 °C | Reduce residual stress |
| Cold Working | — | Increase strength & hardness |
| Welding | TIG / MIG / SMAW | Excellent weldability |
| Brazing | ✔ | Commonly used |
C71500 maintains corrosion resistance even after welding, making it ideal for marine and condenser service.
Mechanical Properties – Copper Nickel C71500
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation (%) | Hardness |
|---|---|---|---|---|
| Annealed (Soft) | 52–66 ksi / 360–455 MPa | 18–25 ksi / 125–170 MPa | 30–45% | 80–120 HB |
| Cold-Worked / Hard | 70–85 ksi / 485–586 MPa | 35–50 ksi / 240–345 MPa | 10–20% | 120–160 HB |
| Tube (ASTM B466) | ≥ 52 ksi / ≥ 360 MPa | ≥ 18 ksi / ≥ 125 MPa | ≥ 30% | ~88 HRB |
| Sheet / Plate (ASTM B122) | 54–75 ksi / 372–517 MPa | 18–43 ksi / 125–300 MPa | 30–45% | 90–130 HB |
International Standards & Equivalent Grades – C71500
| Standard | Equivalent Grade |
|---|---|
| UNS | C71500 |
| ASTM | B111, B122, B151, B466 |
| ASME | SB111, SB122, SB151, SB466 |
| EN | CW354H |
| ISO | CuNi30Fe1Mn |
| BS | CN107 |
Products in Copper Alloys C71500
Copper Alloys C71500 is available in:
✔
Seamless Pipes
✔
Welded Pipes (ERW & EFW)
✔
Tubes (Capillary, U-Bend)
✔
Sheets & Plates
✔
Coils & Strips
✔
Round Bars, Flat Bars, Hex Bars, Square Bars
✔
Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
✔
Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
✔
Fasteners (Bolts, Nuts, Screws, Washers, Studs)
✔
Custom Fabricated Components
Copper Alloys C71500 products are produced to the following global standards:
Uses and Advantages
Exceptional resistance to seawater corrosion and biofouling
High mechanical strength and toughness
Excellent weldability and formability
Non-magnetic and spark-resistant
Thermal and electrical stability
Applications of Copper Alloys C71500
Copper Alloys C71500 is extensively used in:
Marine Engineering
Seawater piping, condensers, saltwater flanges, ship hulls, and offshore platforms.
Power Plants
Heat exchangers, evaporators, condensers.
Desalination Plants
Brine heaters, flash chambers, high-pressure piping.
Chemical Processing
Acid-resistant vessels and piping.
Oil & Gas Industry
Hydraulic lines, instrumentation tubing, firewater systems.
Naval & Defense Applications
Anti-fouling systems, seawater coolers, submarine components.
WHY CHOOSE US?
COPPER NICKEL C71500 PRICE PER KG (INDIA)
Typical Range: ₹2,000 – ₹3,800 per kg
(Price varies by OD, wall thickness, form, and finish)
Contact us for exact quotation based on size and quantity.
FAQ's
What is Copper Nickel 70/30 (C71500) and why is it widely used?
Copper Nickel 70/30, also known as C71500, is an alloy made of 70% copper and 30% nickel with small additions of iron and manganese for added strength. It is highly valued for its exceptional resistance to seawater corrosion, biofouling, and stress corrosion cracking, making it ideal for marine, offshore, and heat exchanger applications.
What are the key benefits of Copper Nickel 70/30 (C71500)?
C71500 offers several performance advantages:
- Outstanding seawater corrosion resistance.
- High mechanical strength and toughness.
- Non-magnetic and spark-resistant properties.
- Excellent weldability, machinability, and formability.
- Thermal and electrical stability under high pressure and elevated temperatures.
What are the common applications of Copper Nickel C71500?
C71500 is widely used in:
- Marine engineering seawater piping, condensers, saltwater flanges, ship hulls, offshore platforms.
- Power plants heat exchangers, evaporators, condensers.
- Desalination plants brine heaters, flash chambers, high-pressure piping.
- Chemical processing acid-resistant piping and vessels.
- Oil & Gas hydraulic lines, firewater systems, instrumentation tubing.
- Naval & Defense submarine components, seawater coolers, anti-fouling systems.
What types of Copper Nickel 70/30 (C71500) products does MOKSH TUBES & FITTINGS LLP supply?
We offer a full range of C71500 Copper Nickel products, including:
- Seamless & Welded Pipes.
- Tubes (U-bend, boiler, heat exchanger).
- Sheets, Plates, Coils & Strips.
- Round Bars, Hex Bars, Square Bars.
- Pipe Fittings (elbows, tees, reducers, caps, stub ends).
- Flanges (weld neck, slip on, blind, threaded, socket weld).
- Fasteners (bolts, nuts, washers, studs).
- Custom-fabricated components.
Why choose MOKSH TUBES & FITTINGS LLP for Copper Nickel 70/30 (C71500)?
MOKSH TUBES & FITTINGS LLP is a leading manufacturer, supplier, and exporter of Copper Nickel 70/30 with:
- In house manufacturing and a wide product range.
- Fast delivery & customized supply for project needs.
- Stringent quality control and third party inspection (TPI available).
- Export ready packaging and worldwide delivery.
- Trusted supplier for marine, power, desalination, oil & gas, and defense industries.
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