YUHONG HOLDING GROUP CO., LTD
| Delivery Time | 7days |
| Standard | ASTM B111, ASME SB111 |
| High Light | ASTM B111 UNS C71500 Copper Nickel Tube, Heat Exchanger Tubee |
| Process | Cold Drawn |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| WT | BWG 25, 22, 20, 18 ... 10 |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Tube End | Plain End, Beveled End |
| Payment Terms | L/C,T/T |
| Material | UNS C71500 , CuNi 70/30 |
| Length | Single Random, Double Random & Cut Length |
| Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| Production Name | Heat Exchanger Tube |
| Model Number | ASTM B111 UNS C71500 Copper Nickel Seamless Tube |
| Brand Name | YUHONG |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
View Detail Information
Explore similar products
ASTM B111 C71500 O61 Copper Nickel Seamless Tubes For Electric Power Industry
ASTM B111 C44300 Admiralty Brass Seamless Tube For Heat Exchanger and Condenser
ASTM B111 C71500 Seamless Copper-Nickel Alloy Tubes High-Efficiency Heat
ASME SB111 C68700 Arsenical Aluminum Brass U Bend Seamless Tube With Impingement
Product Specification
| Delivery Time | 7days | Standard | ASTM B111, ASME SB111 |
| High Light | ASTM B111 UNS C71500 Copper Nickel Tube, Heat Exchanger Tubee | Process | Cold Drawn |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. | WT | BWG 25, 22, 20, 18 ... 10 |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Tube End | Plain End, Beveled End |
| Payment Terms | L/C,T/T | Material | UNS C71500 , CuNi 70/30 |
| Length | Single Random, Double Random & Cut Length | Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| Production Name | Heat Exchanger Tube | Model Number | ASTM B111 UNS C71500 Copper Nickel Seamless Tube |
| Brand Name | YUHONG | Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA | ||
| High Light | ASTM B111 Copper Nickel Tube ，CuNi 70/30 Heat Exchanger Tube ，UNS C71500 CuNi30Mn1Fe Tube | ||
ASTM B111 CuNi30Mn1Fe / UNS C71500 Copper Nickel Seamless Tube CuNi 70/30 Heat Exchanger Tube
ASTM B111/ASME SB111 specifies seamless copper-alloy condenser and heat-exchanger tubes. Grade UNS C71500 (CuNi 70/30, EN CuNi30Mn1Fe) is a copper-based alloy with ~30% nickel, plus controlled iron and manganese. Supplied annealed, it has 483 MPa tensile strength and exceptional ductility. Its defining advantage is outstanding resistance to seawater impingement corrosion, stress-corrosion cracking, and biofouling—far superior to stainless steels in chloride environments. Thermal conductivity is ~15 times higher than steel, enabling superior heat transfer. However, it is limited to moderate temperatures (≤400°C). Extensively used in marine condensers, offshore coolers, and desalination plants.
UNS C71500 (CuNi 70/30) is specifically engineered for aggressive, high-risk aqueous environments—primarily involving seawater, brackish water, and contaminated brine—where standard copper alloys or stainless steels fail prematurely.
Equivalent Grades of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube
| Material Designation | GB/T8890 | ASTM B111 | BS2871 | JIS H3300 | DIN1785 |
| Copper-Nickel | BFe30-1-1 | C71500 | CN107 | C7150 | CuNi30Mn1Fe |
Chemical Composition of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube
| Designation | Chemical Composition % | ||||||||
| Cu | Sn | Al | As | Ni | Fe | Mn | Pb max. | Zn | |
| C71500 | Rem | – | – | – | 29.0-33.0 | 0.4-1.0 | 1.0max | 0.05 | 1.0max |
Tensile Requirements of ASTM B111 UNS C71500 Copper Nickel Tube CuNi 70/30 Heat Exchanger Tube
| Copper or Copper Alloy UNS NO. | Temper Designation | Tensile Strength | Yield Strength | |
| Standard | Former | min ksi | min ksi | |
| C71500 | O61 | annealed | 52 | 18 |
Here is the breakdown of the exact environmental conditions that mandate the use of C71500:
1. High-Velocity Seawater (Erosion-Corrosion Environments)
Condition: Seawater flow velocity exceeding 3.0 m/s (up to 4.5 m/s).
Why: At these speeds, the protective oxide film on C70600 (90/10) or aluminum brass gets mechanically stripped away (impingement attack). C71500 has superior film stability and hardness to withstand turbulent zones, such as inlet ends or U-bend areas of heat exchangers.
2. High-Temperature Marine Environments
Condition: Seawater or cooling water operating continuously above 45°C–50°C, peaking at 90°C to 120°C.
Why: Lower copper alloys suffer from accelerated de-alloying and pitting at elevated temperatures. C71500 maintains its corrosion resistance in hot tropical waters (e.g., Middle East/Persian Gulf seawater intake) and high-temperature engine jacket-water coolers.
3. Polluted or Chemically Aggressive Waters
Condition: Water contaminated with Hydrogen Sulfide (H₂S), Ammonia (NH₃), or industrial wastewater/effluents.
Why: Brass and 90/10 CuNi are highly susceptible to Stress Corrosion Cracking (SCC) and sulfide-induced corrosion in polluted harbors or industrial outfalls. C71500's high nickel content provides immunity to ammonia attack.
4. Sand-Laden or Silty Waters (Erosive Media)
Condition: Coastal or estuarine waters carrying suspended sand, silt, or mud particles (common near river deltas or shallow offshore platforms).
Why: The higher mechanical strength and thicker, iron-enriched protective layer of C71500 resist the "sandblasting" effect that would quickly erode softer copper alloys.
5. Stagnant or Low-Flow Seawater (Microbiological/Fouling Risk)
Condition: Systems with frequent shutdowns, tidal variations, or intermittent operation where water stagnates.
Why: While biofouling occurs on all materials, C71500's copper-ion release inhibits macro-fouling (mussels/barnacles). More importantly, it resists pitting and crevice corrosion under deposits during stagnant periods—a common failure mode for aluminum brass.
Application
Superior Seawater Corrosion Resistance: Forms a tight, protective surface oxide film. Highly resistant to impingement attack, stress corrosion cracking (SCC), and macro-fouling (biomarine growth attaches poorly compared to other metals).
Key Applications:
Seawater Cooled Condensers & Heat Exchangers (power plants, ships, offshore platforms).
Desalination Plant (Multi-Stage Flash & Multi-Effect Distillation) evaporator and heat rejection tubes.
Shipboard Piping for fire mains, bilge, and ballast systems.
Marine Engineering and coastal infrastructure.
Company Details
Business Type:
Manufacturer,Importer,Exporter,Trading Company,Seller,Other
Year Established:
1990
Total Annual:
50M-70M
Employee Number:
50~800
Ecer Certification：
Verified Supplier
Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n... Yuhong Holding Group has more than 35 years experience for pipeline products, till now we have 3 big joint venture factories, the total production area more than 130000 square meters, and more than 600 workers with 106 production lines give our clients excellent supporting always. &n...
Get in touch with us
Leave a Message, we will call you back quickly!