Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of Copper Nickel Cu-Ni Alloy Tubes Supplier | Seamless & Welded Cupronickel Tubing Manufacturer in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Copper Nickel Cu-Ni Alloy Tubes Supplier | Seamless & Welded Cupronickel Tubing Manufacturer
Copper Nickel Cu-Ni Alloy Tubes are widely used in marine engineering, offshore platforms, seawater desalination systems, condensers, and heat exchangers due to their excellent corrosion resistance and long service life in seawater environments.
At Xi'an Dongmeng Group, we supply premium Copper Nickel Tubes, including 90/10 Copper Nickel Tubes and 70/30 Cu-Ni Alloy Tubes, available in seamless, welded, annealed, and custom fabricated forms.
Our Cupronickel Tubing products comply with ASTM B111, ASME SB111, EN, DIN, and JIS standards, ensuring stable mechanical performance, superior anti-biofouling properties, and outstanding thermal conductivity for demanding industrial applications.
Demand the ultimate corrosion protection for seawater systems with our high-performance copper-nickel alloy tubes, the proven solution engineers trust where stainless steel fails and titanium budgets fall short. Surging searches for 'seawater corrosion resistant pipe,' 'low maintenance marine tubing,' and 'cost effective titanium alternative' underscore why B10/B30 Cu-Ni tubes dominate critical applications from offshore platforms to LNG terminals-boasting a self-healing 10-30% nickel matrix that slashes seawater corrosion rates to 0.022mm/year (3x slower than 316 stainless) while delivering 92% of pure copper's thermal conductivity for unprecedented heat exchanger efficiency. As 'RoHS 3.0 compliant refrigeration tube' queries spike globally, our lead-free alloys ace stringent environmental mandates, passing 2,000-hour R744 CO₂ tests at 120°C/12MPa, while 'cryogenic piping for LNG' needs are met with B30's -196°C impact toughness. Forget 'high-pressure pipe fatigue failure' worries: cold-worked tubes achieve 620MPa tensile strength .
What Are Copper Nickel Cu-Ni Alloy Tubes?
Copper Nickel Cu-Ni Alloy Tubes are copper-based alloys containing nickel and small amounts of iron and manganese. These alloys are specifically designed for high-corrosion marine environments where ordinary copper or stainless steel may fail.
Due to their excellent resistance to seawater corrosion, erosion, stress corrosion cracking, and marine biofouling, Cu-Ni Tubes are widely used in:
Heat exchangers
Condensers
Shipbuilding
Offshore oil & gas
Desalination plants
Power stations
product key technologies
Lifetime Seawater Resistance
Top Search: "seawater corrosion-resistant pipe"
Solution: 10-30% nickel content forms self-healing NiO passivation layers, reducing corrosion rates to <0.025mm/year (ASTM B111) – 3x slower than 316 stainless steel.
Thermal Efficiency Unleashed
Top Search: "high thermal conductivity tubing"
Performance: 65 W/(m·K) conductivity – 92% of pure copper – slashes energy costs in heat exchangers while resisting biofouling.
I. Cu-Ni Alloy Classification System
| Category | Grade Series | Ni Content% | Primary Applications | Key Characteristics |
|---|---|---|---|---|
| Standard Cu-Ni | B5, B10, B30 | 5-30 | Marine seawater systems/Condensers | Basic corrosion resistance/Cost-effective |
| Nickel Silver | C7701, C7521 | Ni+Zn=20-30 | Electrical terminals/Jewelry | High strength/Wear resistance/Decorative |
| Aluminum Cu-Ni | BA113, BA16 | Al:3-5 | High-strength corrosion-resistant structures | Tensile strength >800MPa |
| Manganin Cu-Ni | BMn40-1.5 | Mn:1-2 | Thermocouple compensation wires | High resistivity/Low temp coefficient |
| Iron Cu-Ni | BFe10-1-1 | Fe:1-2 | Subsea pipelines/Chemical heat exchangers | Erosion-corros |
II. Chemical Composition Table (wt%)
| Grade | Standard | Cu | Ni | Fe | Mn | Zn | Al | Others |
|---|---|---|---|---|---|---|---|---|
| B10 | ASTM B111 | Bal. | 9-11 | 1.0-2.0 | 0.5-1.0 | ≤0.5 | - | Pb≤0.02 |
| B30 | ASTM B466 | Bal. | 29-32 | 0.4-1.0 | 0.5-1.5 | ≤0.5 | - | C≤0.05 |
| BFe10-1-1 | EN 12449 | Bal. | 10-12 | 1.0-1.8 | 0.3-1.0 | - | - | Mg≤0.05 |
| C7521 | JIS H3130 | 62-65 | 16-19 | ≤0.15 | ≤0.50 | Bal. | - | Pb≤0.03 |
| BA16 | GB/T 4423 | Bal. | 5-6.5 | - | - | - | 6-7 | Ti:0.1-0. |
Key Element Functions:
Ni: Forms protective NiO passivation layer
Fe: Enhances erosion-corrosion resistance (↓ thermal conductivity when >1.5%)
Mn: Deoxidizer, prevents high-temperature embrittlement
Al: Significantly increases strength (reduces ductility)
III. Physical Properties Comparison
| Property | Unit | B10 | B30 | BFe10-1-1 | 316 Stainless | Titanium |
|---|---|---|---|---|---|---|
| Density | g/cm³ | 8.94 | 8.95 | 8.90 | 8.00 | 4.51 |
| Melting Point | °C | 1100 | 1170 | 1120 | 1400 | 1668 |
| Thermal Conductivity (20°C) | W/(m·K) | 65 | 29 | 50 | 16 | 22 |
| CTE (20-100°C) | 10⁻⁶/K | 17.0 | 16.0 | 16.5 | 16.5 | 8.6 |
| Specific Heat Capacity | J/(kg·K) | 377 | 380 | 375 | 500 | 520 |
| Electrical Resistivity (20°C) | μΩ·m | 0.20 | 0.40 | 0.25 | 0.74 | 0.55 |
| Elastic Modulus | GPa | 135 | 152 | 140 | 193 | 110 |
IV. Mechanical Properties (Annealed Condition)
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HV) | Service Temp. (°C) |
|---|---|---|---|---|---|
| B10 | 310-380 | 110-150 | ≥35 | 70-90 | -100~260 |
| B30 | 370-450 | 140-180 | ≥30 | 90-110 | -196~400 |
| BFe10-1-1 | 350-420 | 130-170 | ≥32 | 85-100 | -100~300 |
| Cold-Worked Strengthened Grades | |||||
| B30 Hard Temper | 620-720 | 540-620 | ≥12 | 160-190 | - |
Notes:
Cryogenic Performance: B30 exhibits >50J impact energy at -196°C (vs. titanium's 35J)
High-Temp Limit: Fe/Mn oxidation accelerates above 400°C; max recommended service temp: 260°C
Key Features of Copper Nickel Tubes
Key advantages of Copper Nickel Cu-Ni Alloy Tubes include:
Excellent seawater corrosion resistance
Superior anti-biofouling performance
High thermal conductivity
Outstanding resistance to chloride attack
Excellent fabrication and weldability
Long-term durability in marine systems
Stable mechanical strength at elevated temperatures
Applications of Copper Nickel Cu-Ni Alloy Tubes
Marine Industry
Used in seawater piping systems, ship condensers, cooling circuits, and naval engineering.
Power Plants
Used in condenser and heat exchanger systems due to excellent thermal transfer efficiency.
Offshore Oil & Gas
Widely applied in offshore platforms and FPSO cooling systems.
Desalination Plants
Ideal for saltwater desalination systems because of outstanding seawater resistance.
Inspection & Quality Assurance
Every batch of Copper Nickel Cu-Ni Alloy Tubes undergoes strict quality inspections including:
PMI Testing
Eddy Current Testing
Hydrostatic Testing
Ultrasonic Inspection
Mechanical Property Testing
Chemical Composition Analysis
Dimensional Inspection
Third-party inspections from SGS, BV, TUV, and Intertek are available upon request.
Product Delivery Standards
Export seaworthy wooden packaging
Plastic end caps protection
Anti-rust wrapping
Custom marking & labeling
Mill Test Certificate EN 10204 3.1
Fast delivery for standard sizes
FAQ – Copper Nickel Cu-Ni Alloy Tubes
What are Copper Nickel Cu-Ni Alloy Tubes?
Copper Nickel Cu-Ni Alloy Tubes are copper-based alloy tubes containing nickel, iron, and manganese. These tubes are widely used in marine, offshore, condenser, and heat exchanger systems because of their excellent seawater corrosion resistance, anti-biofouling performance, and long service life.
What is the difference between 90/10 and 70/30 Copper Nickel Tubes?
90/10 Copper Nickel Tubes contain approximately 90% copper and 10% nickel, offering excellent corrosion resistance and cost efficiency for general marine applications.
70/30 Copper Nickel Tubes contain 70% copper and 30% nickel, providing higher strength, better erosion resistance, and improved durability in high-velocity seawater systems and offshore environments.
What are Copper Nickel Tubes used for?
Copper Nickel Tubes are commonly used in:
Marine seawater piping systems
Heat exchangers
Condensers
Offshore oil & gas platforms
Shipbuilding
Desalination plants
Power station cooling systems
Naval engineering
Are Copper Nickel Cu-Ni Alloy Tubes resistant to seawater corrosion?
Yes. Copper Nickel Cu-Ni Alloy Tubes are specifically designed for seawater service. They provide outstanding resistance to:
Seawater corrosion
Chloride attack
Stress corrosion cracking
Erosion corrosion
Marine biofouling
This makes Cupronickel Tubing one of the most reliable materials for marine and offshore applications.
What standards are available for Copper Nickel Tubing?
We supply Copper Nickel Cu-Ni Alloy Tubes according to international standards including:
ASTM B111
ASME SB111
EN 12451
DIN 86019
JIS H3300
Custom specifications are also available upon request.
Do you supply seamless and welded Copper Nickel Tubes?
Yes. We provide:
Seamless Copper Nickel Tubes
Welded Cu-Ni Tubes
Heat Exchanger Tubes
Condenser Tubes
U Bend Tubes
Finned Tubes
All products can be customized according to project requirements.
What sizes of Copper Nickel Tubes can you provide?
We can supply customized:
Outer Diameter (OD)
Wall Thickness
Tube Length
Straight Tubes
Coil Tubes
U Bend Tubes
Special dimensions for heat exchangers and condensers are available.
What are the advantages of Copper Nickel Cu-Ni Alloy Tubes?
Key benefits include:
Excellent seawater corrosion resistance
Superior anti-biofouling properties
High thermal conductivity
Excellent weldability
Long service life
Strong mechanical strength
Excellent fabrication performance
Are Copper Nickel Tubes suitable for heat exchangers?
Yes. Copper Nickel Heat Exchanger Tubes are widely used in condensers, evaporators, coolers, and thermal transfer systems because of their excellent thermal conductivity and corrosion resistance.
Can Copper Nickel Tubes be used in offshore oil & gas projects?
Absolutely. 70/30 Copper Nickel Tubes are commonly used in offshore platforms, FPSO systems, firewater systems, and seawater cooling pipelines because they can withstand aggressive marine environments.
Do you provide Mill Test Certificates for Copper Nickel Tubes?
Yes. All Copper Nickel Cu-Ni Alloy Tubes can be supplied with:
EN 10204 3.1 MTC
Chemical Composition Reports
Mechanical Test Reports
Hydrostatic Test Reports
Third-Party Inspection Certificates
SGS, BV, TUV, and Intertek inspections are available.
Can you provide custom fabricated Copper Nickel Tubing?
Yes. We offer custom fabrication services including:
Tube cutting
Tube bending
U bend processing
Flaring
End machining
Polishing
Custom packaging
OEM and project-based production are supported.
Why choose Xi'an Dongmeng Group as your Copper Nickel Tube supplier?
Xi'an Dongmeng Group provides:
Stable raw material quality
Strict inspection procedures
Competitive factory prices
Fast global delivery
Professional export experience
Custom manufacturing support
Marine-grade alloy expertise
We serve customers worldwide in marine, offshore, power generation, and industrial heat exchanger industries.
Looking for a Reliable Copper Nickel Tube Supplier?
Xi'an Dongmeng Group supplies premium Copper Nickel Cu-Ni Alloy Tubes, including 90/10 Copper Nickel Tubes, 70/30 Cupronickel Tubing, seamless condenser tubes, and marine-grade Cu-Ni pipes for global industrial projects.
Contact us today for:
Free quotation
Custom sizes
Mill test certificates
Technical support
Fast worldwide delivery
Contact Us
Xi'an Dongmeng Group Co., Ltd
Phone / WhatsApp / WeChat: +8615769214734
Email: office@dongmjd.com
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