Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of copper-nickel (cu-ni) alloy tubes 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.
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 .
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
Hot Tags: copper-nickel (cu-ni) alloy tubes, China copper-nickel (cu-ni) alloy tubes manufacturers, suppliers, factory, ASTM B43 Seamless Red Brass Pipe, UNS C17000 Beryllium Copper Alloys, UNS C17200 Beryllium Copper Alloys, UNS C17500 Beryllium Copper Alloys, UNS C26800 Yellow Brass Copper Alloy, UNS C44400 Copper Zinc Tin Alloys
