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Copper Alloys C71520 | Product Overview
Introduction To Copper Alloys C71520 / CU-NI 70/30
MOKSH TUBES & FITTINGS LLP proudly supplies and exports Copper Nickel C71520, a high-performance variant of the traditional CU-NI 70/30 (UNS C71500) alloy. This enhanced copper-nickel alloy offers improved mechanical strength, corrosion resistance, and erosion resistance over conventional grades.
Copper Alloys C71520, is a controlled composition Copper-Nickel Alloy with approximately 70% copper and 30% nickel, with additions of iron and manganese for increased resistance to seawater flow, cavitation, and stress corrosion cracking. It is specially formulated for high-velocity seawater environments and heat exchanger service. This alloy is often specified in naval, offshore, desalination, and thermal power applications.
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Technical Specifications – Copper Nickel C71520 (Enhanced Cu-Ni 70/30)
| Category | Details |
|---|---|
| Material | Copper Nickel 70/30 – Enhanced Grade |
| UNS Number | C71520 |
| EN Equivalent | CW354H |
| ISO / DIN | CuNi30Fe1Mn |
| Copper Content | ~65 – 69 % |
| Nickel Content | 29 – 33 % |
| Iron Content | 0.4 – 1.2 % |
| Manganese | 0.5 – 1.0 % |
| Magnetic Properties | Non-Magnetic |
| Heat Treatable | ❌ No |
| Strength Control | Cold Working |
| Seawater Resistance | Excellent (High-Velocity Flow) |
| Erosion / Cavitation | Superior |
| Typical Use | Marine, Offshore, Heat Exchangers |
Chemical Composition – UNS C71520
| Element | Composition (% by weight) |
|---|---|
| Copper (Cu) | Balance (approx. 65 – 69) |
| Nickel (Ni) | 29.0 – 33.0 |
| Iron (Fe) | 0.4 – 1.2 |
| Manganese (Mn) | 0.5 – 1.0 |
| Zinc (Zn) | ≤ 1.0 |
| Lead (Pb) | ≤ 0.02 |
| Other Impurities | ≤ 0.50 (Total) |
Note: C71520 includes enhanced control over trace elements and impurity levels for superior corrosion resistance in critical systems.
Mechanical Properties – C71520 (Annealed Condition)
| Condition | Tensile Strength | Yield Strength (0.2%) | Elongation (%) | Hardness |
|---|---|---|---|---|
| Annealed / Soft (M20 / O25) | ≥ 50 ksi / ≥ 345 MPa | ≥ 18 ksi / ≥ 125 MPa | 30 – 35% | ~80 HB |
| Half-Hard (H01) | ~55 ksi / ~380 MPa | ~25 ksi / ~170 MPa | ≥ 10% | 80 – 100 HB |
| Quarter-Hard (H04) | ~60 ksi / ~415 MPa | ~25 ksi / ~170 MPa | ≥ 10% | 100 – 120 HB |
| Full-Hard (H08) | ~65 ksi / ~450 MPa | ~25 ksi / ~170 MPa | ≥ 10% | 110 – 130 HB |
| Flat Products (M10) | 45 – 50 ksi / 310 – 345 MPa | ≥ 20 ksi / ≥ 105 MPa | ≥ 30% | ~80 HB |
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 C71520
Copper Alloys C71520 is extensively used in:
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ's
What is Copper Nickel C71520 and how is it different from C71500?
Copper Nickel C71520 is a high performance version of the traditional Cu-Ni 70/30 alloy (UNS C71500). It contains around 70% copper and 30% nickel with controlled additions of iron and manganese, giving it enhanced mechanical strength, better erosion resistance, and improved durability in high-velocity seawater environments compared to the standard grade.
What are the main advantages of Copper Nickel C71520?
- Exceptional resistance to seawater corrosion, biofouling, and microbial corrosion
- Superior erosion and cavitation resistance in turbulent marine systems
- Excellent thermal conductivity for heat exchangers
- Retains strength at high pressures
- Non-magnetic and spark resistant
- Highly weldable, making it ideal for critical engineering applications
Where is Copper Nickel C71520 commonly used?
- Marine & Offshore engineering seawater piping, condensers, pumps, ship hulls.
- Naval & Defense submarine components, anti-fouling systems, seawater cooling lines.
- Desalination plants brine heaters, high-pressure piping.
- Power plants condensers and heat exchangers.
- Oil & Gas firewater systems, hydraulic lines, instrumentation tubing.
What Copper Nickel C71520 products are available from MOKSH TUBES & FITTINGS LLP?
- Seamless and Welded Pipes.
- Heat Exchanger and U-bend Tubes.
- Sheets, Plates, Coils, Strips.
- Round Bars, Square Bars, Hex Bars.
- Pipe Fittings.
- Flanges.
- Fasteners.
- Custom Fabricated Components.
Why should I choose MOKSH TUBES & FITTINGS LLP for Copper Nickel C71520?
- Certified materials that meet ASTM, EN, MIL, and DEF STAN standards.
- In house CNC machining & customized fabrication.
- Strict quality control with third party inspections.
- Fast worldwide delivery with export ready packaging.
- Trusted solutions for marine, power, offshore, oil & gas, and defense projects.
Contact Us
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