YUHONG HOLDING GROUP CO., LTD
| Payment Terms | L/C,T/T |
| Delivery Time | 7days |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap |
| Production Name | Heat Exchanger Tube |
| Standard | ASTM B111, ASME SB111 |
| Material | UNS C70600 , CuNi 90/10 |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| WT | BWG 25, 22, 20, 18 ... 10 |
| Length | Single Random, Double Random & Cut Length |
| Tube End | Plain End, Beveled End |
| Process | Cold Drawn |
| Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| High Light | ASTM B111 UNS C70600 Copper Nickel Tube, Heat Exchanger Tubee |
| Brand Name | YUHONG |
| Model Number | ASTM B111 UNS C70600 Copper Nickel Seamless Tube |
| 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
JIS H3300 C6872T Copper Alloy Steel Heat Exchanger Tube In Petrochemical
Product Specification
| Payment Terms | L/C,T/T | Delivery Time | 7days |
| Packaging Details | Ply-wooden Case /Iron Case/ Bundle with plastic Cap | Production Name | Heat Exchanger Tube |
| Standard | ASTM B111, ASME SB111 | Material | UNS C70600 , CuNi 90/10 |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. | WT | BWG 25, 22, 20, 18 ... 10 |
| Length | Single Random, Double Random & Cut Length | Tube End | Plain End, Beveled End |
| Process | Cold Drawn | Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| High Light | ASTM B111 UNS C70600 Copper Nickel Tube, Heat Exchanger Tubee | Brand Name | YUHONG |
| Model Number | ASTM B111 UNS C70600 Copper Nickel Seamless Tube | Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA | ||
| High Light | ASTM B111 copper nickel seamless tube ，C70600 heat exchanger tube ，CuNi 90/10 seamless tube | ||
ASTM B111 UNS C70600 / CuNi 90/10 Temper O61 Copper Nickel Seamless Tube
ASTM B111 C70600 O61 seamless tube is not a generic commodity, but a sophisticated, engineered material solution. Its value lies in the deliberately balanced chemistry that creates a robust, self-healing surface film, the integrity of seamless construction, and its proven performance in the challenging, variable environment of flowing seawater and harsh coolants. The O61 temper is a specific guarantee of fit-for-purpose metallurgical condition and used in heat exchangers.
Chemical Composition of Copper Alloys
| Designation | Chemical Composition % | ||||||||
| Cu | Sn | Al | As | Ni | Fe | Mn | Pb max. | Zn | |
| C44300 | 70.0-73.0 | 0.9-1.2 | – | 0.02-0.06 | – | 0.06 max | – | 0.07 | Rem |
| C68700 | 76.0-79.0 | – | 1.8-2.5 | 0.02-0.06 | – | 0.06 max | – | 0.07 | Rem |
| C70400 | Rem | – | – | – | 4.8-6.2 | 1.3-1.7 | 0.3-0.8 | 0.05 | 1.0max |
| C70600 | Rem | – | – | – | 9.0-11.0 | 1.0-1.8 | 1.0max | 0.05 | 1.0max |
| C71500 | Rem | – | – | – | 29.0-33.0 | 0.4-1.0 | 1.0max | 0.05 | 1.0max |
| C71640 | Rem | – | – | – | 29.0-32.0 | 1.7-2.3 | 1.5-2.5 | 0.05 | 1.0max |
O61 (Temper): This is a critical but often overlooked spec. "O61" refers to a specific annealed temper achieved by a controlled process (heating to a minimum of 1000°F / 538°C) that results in a recrystallized grain structure. This is distinct from a soft, as-fabricated anneal. It provides an optimal balance: excellent ductility for tube expansion into tube sheets, sufficient strength for handling and operation, and most importantly, maximized resistance to stress corrosion cracking (SCC) in service. It is the preferred temper for most heat exchanger applications.
Equivalent Grades of Copper Alloys
| Material Designation | Corresponding Material Symbol | ||||
| GB/T8890 | ASTM B111 | BS2871 | JIS H3300 | DIN1785 | |
| Copper-Nickel | BFe10-1-1 | C70600 | CN102 | C7060 | CuNi10Fe1Mn |
| BFe30-1-1 | C71500 | CN107 | C7150 | CuNi30Mn1Fe | |
| (BFe30-2-2) | C71640 | CN108 | C7164 | CuNi30Fe2Mn2 | |
| (BFe5-1.5-0.5) | C70400 | – | – | – | |
| B7 | – | – | – | – | |
| Aluminums Brass | HAL77-2 | C68700 | CZ110 | C6870 | CuZn20Al2 |
| Admiralty Brass | HSn70-1 | C44300 | CZ111 | C4430 | CuZn28Sn1 |
| Boric Brass | Hsn70-18 | – | – | – | – |
| HSn70-1 AB | – | – | – | – | |
| Arsenical Brass | H68A | – | CZ126 | – | – |
| Brass Tube | H65/H63 | C28000/C27200 | CZ108 | C2800/C2700 | CuZn36/CuZn37 |
Tensile Requirements:
| Copper or Copper Alloy UNS NO. | Temper Designation | Tensile Strength | Yield Strength | |
| Standard | Former | min ksi | min ksi | |
| C44300 | O61 | annealed | 45 | 15 |
| C68700 | O61 | annealed | 50 | 18 |
| C70400 | H55 | light-drawn | 38 | 30 |
| C70600 | H55 | light-drawn | 45 | 15 |
| C71500 | O61 | annealed | 52 | 18 |
| C71640 | O61 | annealed | 63 | 25 |
Competitive Context: When to Choose It Over Alternatives
vs. Admiralty Brass (C44300): C70600 is superior in erosion-corrosion resistance, ammonia SCC resistance, and general seawater corrosion. It is the upgrade choice for more demanding duty.
vs. 70/30 CuNi (C71500): C71500 has better overall corrosion resistance (especially to high velocity) and strength, but at a ~20-30% cost premium. C70600 is often the cost-performance optimum for standard seawater services.
vs. Titanium Gr. 2: Titanium is unbeatable for extreme chloride/SCC environments and very high velocities. C70600 is chosen when biofouling resistance is desired (titanium is prone to biofilm), for compatibility with existing CuNi systems, or where first-cost is a major constraint.
vs. Super Duplex Stainless Steel (e.g., S32750): Super duplex offers immense strength and pitting resistance. C70600 is selected in systems with risk of under-deposit corrosion from sand/silt, where its inherent tolerance to low-flow conditions and its noble corrosion potential (less galvanic corrosion to other components) are beneficial.
Application
While used in power plant condensers, its unique profile makes it the engineered choice for:
Offshore & Marine Seawater Systems: Not just main condensers, but for cooler bundles on seawater lift pumps, high-pressure side-stream filters, and produced water coolers. Its resistance to biofouling and high-velocity seawater is key.
Desalination Plants: Specifically in Multi-Stage Flash (MSF) distiller brine heaters and heat rejection sections, where tolerance to chlorination and sulfides is required.
Shipbuilding: For lubricant coolers, charge air coolers, and central cooling system heat exchangers where reliability in polluted or variable salinity harbor water is critical.
Chemical Process Industries: Handling cooling media with trace sulfides or in ammonia environments, where stainless steels or other copper alloys would fail.
Geothermal and Brackish Water Cooling: Where water chemistry is aggressive but not fully representative of clean ocean water.
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!