When it comes to reliable performance in demanding environments like marine, offshore, and chemical processing, Copper Nickel Cu-Ni 70/30 (C71500) Flanges are one of the most trusted piping components. Known for their excellent resistance to seawater corrosion, erosion, and biofouling, these flanges are widely used where durability and long service life are critical.
As an experienced copper nickel flange manufacturer , we produce a wide range of c70600 flange products that meet international standards such as ASTM B151 Cu-Ni 70/30 and DIN 2.0882 . Our goal is to provide high-quality flanges that are not only technically reliable but also practical for real-world industrial applications.
What is Copper Nickel 70/30 (UNS C71500)?
Copper Nickel 70/30, also known as UNS C71500, is an alloy composed mainly of copper and nickel, with small additions of iron and manganese. Compared to 90/10 copper nickel, this grade offers higher strength and better resistance to aggressive environments.
Because of these properties, copper nickel flange products are widely used in critical systems where failure is not an option.
Key Features & Benefits
- Excellent seawater corrosion resistance: Exceptional resistance to seawater corrosion, making Copper Nickel Cu-Ni 70/30 (C71500) Flanges highly suitable for marine, offshore, and desalination applications where constant exposure to saltwater and moisture is common.
- Strong and durable in harsh environments: High mechanical strength and durability allow these flanges to perform reliably in harsh industrial environments, including high-pressure and high-temperature systems.
- Long service life with low maintenance: Long operational service life with minimal maintenance requirements helps reduce downtime and overall operational costs in critical piping systems.
- Good weldability and fabrication: Excellent weldability and fabrication properties enable easy installation, machining, and customization for a wide range of industrial piping applications.
- Resistant to biofouling and scaling: Superior resistance to biofouling, scaling, and marine organism growth ensures smooth fluid flow and enhanced efficiency in seawater handling systems and heat exchangers.
Types of Copper Nickel C71500 Flanges
We manufacture and supply a complete range of copper nickel flange types:
➤ Weld Neck & Long Weld Neck Flanges
- ASTM B151 Cu-Ni 70/30 Longweld Neck Flange
- Din 2.0882 Weld Neck Flange
- c71500 weld neck flange
These are ideal for high-pressure and high-temperature applications.
➤ Copper Alloy B151 Slip On Flange Manufacturer in India
- UNS C71500 Slip On Flange Supplier
- UNS C71500 Socketweld Flange Stockist
- Cu Ni 70-30 SORF Flange Stockist
Easy to install and cost-effective for moderate pressure systems.
➤ Copper Nickel Blind Flange
- ASTM B151 Cu-Ni 70/30 Threaded Flange
- Din 2.0882 Lap Joint Flange
Used where welding is not preferred.
➤ Blind, Reducing & Orifice Flanges
- Din 2.0882 Blind Flange Stockist
- Cu Ni 70-30 Reducing Flange Exporter
- UNS C71500 Orifice Flange Manufacture
Used for sealing, flow control, and pipeline modification.
➤ Specialty Flanges
- ASTM B151 Cu-Ni 70/30 RTJ Flange
- Din 2.0882 Square Flange
- Cu Ni 70-30 Forge Flange
- Cu Ni 70-30 tongue & groove Flanges Manufacturer
Designed for critical and custom applications.
Copper Nickel C71500 Flanges – Specifications
| Specification | Details |
|---|---|
| Material | Copper Nickel 70/30 |
| Equivalent | DIN 2.0882 |
| Grade | UNS C71500 |
| Standard | ASTM B151 Cu-Ni 70/30 |
| Size Range | ½” NB to 48” NB |
| Pressure Rating | 150# to 2500# |
| Flange Types | Slip On, Weld Neck, Blind, Threaded, Socket Weld, RTJ |
| Face Types | RF, FF, RTJ |
| Manufacturing | Forged / Machined |
| Testing | NDT, PMI, Hydro Testing |
Chemical Composition of Copper Nickel C71500
| Element | Composition (%) |
|---|---|
| Copper (Cu) | 69.0 – 71.0 |
| Zinc | 1.0 max |
| Nickel (Ni) | 29.0 – 33.0 |
| Iron (Fe) | 0.40 – 1.00 |
| Manganese (Mn) | 0.50 – 1.00 |
| Lead (Pb) | 0.02 max |
| Carbon | 0.05 max |
This balanced composition ensures excellent corrosion resistance and mechanical strength.
Mechanical Properties of UNS C71500 Flanges
| Property | Value |
|---|---|
| Tensile Strength | 485 MPa (min) |
| Yield Strength | 125 MPa min |
| Elongation | 30% min |
| Hardness | 80–100 HB |
| Density | 8.94 g/cm³ |
| Melting Point | 1170 – 1240°C |
Copper Nickel Flange Dimensions (ASME B16.5 – Class 150 Example)
| NPS | OD (mm) | Thickness (mm) | Bolt Circle (mm) | Holes | Bolt Size |
|---|---|---|---|---|---|
| ½” | 90 | 9.6 | 60.3 | 4 | M14 |
| 1" | 108 | 11.2 | 79.4 | 4 | M16 |
| 2" | 152 | 14.3 | 120.7 | 4 | M16 |
| 4" | 229 | 17.5 | 190.5 | 8 | M16 |
| 6 | 279 | 20.6 | 241.3 | 8 | M20 |
| 8" | 343 | 22.4 | 298.5 | 8 | M20 |
Copper Nickel Flange Weight Chart
| Size | Weight (kg) |
|---|---|
| ½” | 1.0 |
| 1” | 1.8 |
| 2” | 3.5 |
| 4” | 7.5 |
| 6” | 12 |
| 8” | 18 |
| 10” | 25 |
| 12” | 35 |
Applications of Copper Nickel Flanges
These flanges are widely used in:
- Marine and shipbuilding
- oil & gas platforms
- Heat exchangers and condensers
- Desalination plants
- Power generation industries
- Chemical processing
Why Choose Us as Your Copper Nickel Flange Supplier?
As a reliable copper nickel flange supplier, we focus on delivering quality, consistency, and technical support.
- Wide stock of copper nickel blind flange, slip-on, threaded, and weld neck
- Fast delivery across global markets
- Custom sizes and specifications available
- Strong quality control process
- Technical support for selection and application
Frequently Asked Questions
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