High Quality Copper Nickel Buttweld Pipe Fittings
70/30 • Strength • Sealing • Durability
Get a QuotePremium Copper Nickel 70/30 Buttweld Pipe Fittings by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, and supplier of Copper Nickel 70/30 Buttweld Pipe Fittings, engineered for exceptional performance in marine and seawater applications. Copper Nickel 70/30, containing 70% copper and 30% nickel with iron additions, offers outstanding resistance to seawater corrosion, biofouling, and erosion.
Copper Nickel 70/30 Buttweld Pipe Fittings are known for their superior mechanical strength, excellent thermal stability, and long service life in high-velocity seawater systems. These fittings exhibit excellent weldability and maintain corrosion resistance even in polluted or fast-flowing marine environments. Precisely machined bevel ends ensure leak-free weld joints, smooth fluid flow, and reliable system performance.
Widely used in marine engineering, offshore platforms, shipbuilding, desalination plants, power generation, and heat exchanger systems, our Copper Nickel 70/30 buttweld fittings comply with international quality standards. Choose Ratnadeep Steel & Engg. Co. for durable, corrosion-resistant copper nickel fittings designed for demanding seawater applications.
- Copper Nickel 70/30 90 Deg Elbow
- Cu-Ni 70/30 45 Deg Elbow
- UNS C71500 180 Deg Elbow
- DIN 2.0882 SR Elbow
- B16.9 CuNi 70-30 90 Degree Short Radius Elbow
- 70/30 Cupro Nickel 45 Deg Long Radius Elbow
- ASME B16.9 Copper Nickel 70/30 Equal Tee
- UNS C71500 Pipe Tee
- Cu-Ni 70/30 Butt weld Tee
- ASME SB122 CuNi 70/30 Reducing Tee manufacturer
- DIN 2.0882 Unequal Tee
- Cupro Nickel 70/30 Straight Tee
- ASTM B122 Copper Nickel 70/30 Eccentric Reducer Supplier
- B16.9 Cupro Nickel 70/30 Eccentric Reducer
- Cu-Ni Alloy UNS C71500 Eccentric Reducers
- DIN 2.0882 Eccentric Reducer
- ANSI B16.9 Copper Nickel 70/30 Concentric Reducer Supplier
- ASME SB122 Cupro Nickel 70/30 Concentric Reducer
- Cu-Ni C71500 Concentric Reducers
- CuNi DIN 2.0882 Concentric Reducer
- ANSI / ASME B16.9 Copper Nickel 70/30 Long Stub End Supplier
- ASTM B122 / ASME SB 122 Cu-Ni 70/30 Lap Joint Stub End
- Cupro Nickel C71500 Long Stub Ends
- DIN 2.0882 Long Stub End
- ASTM B122 Copper Nickel 70/30 Short Stub End Supplier
- 70/30 Cupro Nickel ASME B16.9 Short Stub Ends
- CuNi Alloy UNS C71500 Short Stub Ends Exporter
- DIN 2.0882 Short Stub End
- ASTM B122 Copper Nickel 70/30 Pipe Cap Supplier
- ASME B16.9 Cupro Nickel 70/30 End Pipe Cap
- Copper UNS C71500 Pipe End Cap
- ASME SB122 Cuni 70/30 Buttweld Cap
- DIN 2.0882 End Cap
- ASTM B122 Copper Nickel 70/30 Equal Cross
- ASME B16.9 Cu-Ni 70/30 Buttweld Cross
- CuNi C71500 Unequal Cross
- ASME SB122 Cupro Nickel 70/30 Pipe Cross
- DIN 2.0882 Reducing Cross
- ASME SB 122 Cupro Nickel 70/30 Pipe Bend Exporter
- B16.9 Cu-Ni 70/30 Piggable Bend
- CuNi C71500 U Bend
- DIN 2.0882 Long Radius Bend
- 70/30 Copper Nickel Buttweld Bend Supplier
CHEMICAL COMPOSITION OF COPPER NICKEL 70/30 SEAMLESS AND WELDED PIPE FITTINGS
| Element | Cu | Ni | Fe | Mn | Zn | Pb | Other |
|---|---|---|---|---|---|---|---|
| Copper Nickel 70/30 | 65.0 min | 29-33 | 0.4-1.0 | 1.0 max | 1.0 max | 0.05 max | 0.5 max |
MECHANICAL PROPERTIES OF ASME SB122 COPPER NICKEL 70/30 BUTTWELD PIPE FITTINGS
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength, Ultimate | 372-517 MPa | 54000-75000 psi |
| Tensile Strength, Yield | 88.0-483 MPa | 12800-70100 psi |
| Elongation at Break (in 381 mm) | 45.0% | 45.0% |
| Charpy Impact | 107 J | 78.9 ft-lb |
| Machinability (UNS C36000 = 100%) | 20% | 20% |
| Shear Modulus | 57.0 GPa | 8270 ksi |
| Poisson’s Ratio | 0.34 | 0.34 |
| Elastic Modulus | 150 GPa | 21800 ksi |
Specification of Copper Nickel 70/30 Buttweld Fittings
| Specifications | ASTM B122, B171, B466, B467 |
|---|---|
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10 ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
| Size | Seamless Butt Weld Fittings: ½” to 10″ | Welded Butt Weld Fittings: ½” to 48″ |
| Schedule | SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75 |
| Bending Radius | R=1D, 2D, 3D, 5D, 6D, 8D, 10D or Custom |
| Type | Seamless / ERW / Welded / Fabricated |
| Thickness | 20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc. |
COPPER NICKEL 70/30 ASTM B122 BUTTWELD FITTINGS EQUIVALENT GRADES
| STANDARD | UNS | WNR. | EN | DIN | JIS | BS |
|---|---|---|---|---|---|---|
| Copper Nickel 70/30 | C71500 | 2.0882 | CuNi30Fe | CuNi30Fe | C7150 | CN 107 |
PHYSICAL PROPERTIES OF ASTM B171 CU-NI 70/30 PIPE FITTINGS
| Property | Metric | Imperial |
|---|---|---|
| Density | 8.94 g/cm³ | 0.323 lb/in³ |
| Melting Point | 1171°C | 2140°F |
| Specific Heat @ 20°C (68°F) | 0.376 J/g·°C | 0.090 Btu/lb·°F |
| Thermal Conductivity @ 20°C (68°F) | 29 W/m·K | 200 Btu·in/h·ft²·°F |
| Electrical Resistivity @ 20°C (68°F) | 0.040 μΩ·m | 0.040 μΩ·m |
| Mean Coefficient of Thermal Expansion (20-100°C) | 16.2 × 10⁻⁶ /°C | 9.0 × 10⁻⁶ /°F |
| Magnetic Permeability | Non-magnetic | Non-magnetic |
💡 Practical Difference in Use
Use Copper Nickel 70/30 Buttweld Pipe Fittings when: superior resistance to seawater corrosion, erosion, and biofouling is required in high-velocity marine and offshore environments. Copper Nickel 70/30 offers enhanced strength and durability compared to lower nickel grades. → Example: marine piping systems, offshore platforms, desalination plants, shipbuilding, and power plant heat exchangers.
Applications of Copper Nickel 70/30 Buttweld Pipe Fittings
Copper Nickel 70/30 fittings are engineered for long service life in aggressive seawater and coastal environments.
- Marine & Offshore: Seawater cooling, ballast systems, and offshore piping.
- Power Generation: Condenser and heat exchanger pipelines.
- Desalination: High-velocity seawater intake and discharge lines.
When to Choose Copper Nickel 70/30?
This grade is ideal for demanding marine applications where higher strength and corrosion resistance are essential.
Choose Copper Nickel 70/30 when:
- Continuous exposure to fast-flowing seawater is present
- High resistance to erosion and biofouling is required
- Long service life in offshore conditions is critical
- Reliable weldability and mechanical strength are needed
- Used in marine, offshore, or desalination systems
Industries That Use Copper Nickel 70/30 Buttweld Pipe Fittings
Copper Nickel 70/30 fittings are widely adopted in marine and coastal industries.
Designed for harsh seawater environments.
Uses
Seawater cooling lines, ballast systems, and ship piping.
Why Copper Nickel 70/30?
Excellent resistance to seawater corrosion and erosion.
Handles high salinity and flow rates.
Uses
Offshore piping systems and desalination plants.
Why Copper Nickel 70/30?
High durability and long-term reliability.
Supports thermal efficiency.
Uses
Heat exchangers and condenser tubing.
Why Copper Nickel 70/30?
Excellent thermal conductivity and corrosion resistance.
Usage Guide for Copper Nickel 70/30 Buttweld Pipe Fittings
Directional flow change in high-velocity seawater and marine piping systems.
Choose Elbow when
- 45°, 90°, or 180° direction change is required
- Handling seawater or brackish water
- Erosion and corrosion resistance is critical
- Used in marine and offshore piping
Branch connections in marine and offshore fluid distribution systems.
Choose Tee when
- Branch or distribution lines are required
- Continuous seawater exposure exists
- High mechanical strength is needed
- Used in offshore and shipbuilding systems
Prevents air pockets in horizontal seawater and pump suction lines.
Choose Eccentric Reducer when
- Installed on horizontal pipelines
- Used on pump suction lines
- Handling high-velocity seawater
- Flow stability is essential
Uniform diameter transition in vertical marine piping systems.
Choose Concentric Reducer when
- Vertical alignment is required
- Uniform flow transition is needed
- Used in pressurized seawater systems
- Offshore piping installations
Enables easy dismantling in marine lap joint flange systems.
Choose Long Stub End when
- Frequent inspection is required
- Large-diameter marine pipelines are used
- High corrosion resistance at flanges is critical
- Used in offshore piping
Compact lap joint solution for marine piping systems.
Choose Short Stub End when
- Space constraints exist
- Cost-effective lap joints are needed
- Moderate pressure marine systems
- Seawater corrosion resistance is required
Seals pipe ends in seawater and offshore systems.
Choose Pipe Cap when
- Pipe termination is required
- Used for pressure testing
- Marine corrosion resistance is essential
- Installed in offshore pipelines
Four-way flow distribution in marine piping networks.
Choose Cross when
- Multi-directional branching is required
- Used in shipboard piping systems
- High weld strength is critical
- Continuous seawater exposure exists
Smooth directional changes with minimal erosion.
Choose Pipe Bend when
- Large-radius bends are required
- Pressure drop must be minimized
- Used in seawater circulation systems
- Long service life is critical
Our Buttweld Pipe Fittings are manufactured using advanced processes and undergo extensive quality checks to ensure flawless weldability, durability, and long service life. Each fitting is thoroughly inspected using key NDT techniques such as radiographic testing (RT), ultrasonic testing (UT), hydrostatic testing, and visual/dimensional examination. We also perform detailed chemical composition analysis and mechanical property testing to ensure material compliance with strict industry standards.
Throughout the forming and welding stages, every buttweld fitting is monitored closely to eliminate defects such as misalignment, surface irregularities, and wall-thickness variations. This ensures perfect joint integrity and high-performance reliability in pipelines carrying high temperatures, pressures, and corrosive media. All our buttweld fittings fully comply with ASME, ASTM, MSS-SP, and related global specifications, making them a preferred choice for critical piping systems worldwide.
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