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 |
| Radius | Can Custom |
| Tube End | Plain End, Beveled End |
| Process | Cold Drawn |
| Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| High Light | ASTM B111 C70600 Copper Nickel Seamless Tube, CuNi 90/10 U Bend Heat Exchanger Tube |
| Brand Name | YUHONG |
| Model Number | ASTM B111 UNS C70600 Copper Nickel U Bend Tube |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA |
View Detail Information
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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 |
| Radius | Can Custom | Tube End | Plain End, Beveled End |
| Process | Cold Drawn | Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| High Light | ASTM B111 C70600 Copper Nickel Seamless Tube, CuNi 90/10 U Bend Heat Exchanger Tube | Brand Name | YUHONG |
| Model Number | ASTM B111 UNS C70600 Copper Nickel U Bend Tube | Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
| Place of Origin | CHINA | ||
| High Light | ASTM B111 C70600 Copper Nickel tube ，CuNi 90/10 U bend tube ，seamless heat exchanger tube | ||
ASTM B111 UNS C70600 / CuNi 90/10 Temper O61 Copper Nickel Seamless Tube U Bend Heat Exchanger Tube
ASTM B111 C70600 (CuNi 90/10) U bend tubes are seamless and specifically designed for marine heat exchangers and condensers. Composed of 90% copper and 10% nickel with iron, they offer excellent corrosion resistance, especially against seawater and biofouling. The U-bend configuration accommodates thermal expansion in shell-and-tube systems. However, they are sensitive to high-velocity turbulence at the bend (impingement attack) and must not be used in polluted water containing sulfides, which cause rapid pitting.
Cu-Ni 90/10 vs. The Competition
vs. Carbon Steel (SA179): SA179 is cheaper and stronger, but it rusts instantly in seawater. Cu-Ni is chosen where corrosion resistance is mandatory.
vs. Stainless Steel (316L): Stainless steel can suffer from "Crevice Corrosion" in stagnant seawater (under barnacles or gaskets). Cu-Ni handles stagnant conditions (with proper velocities) better. Also, Cu-Ni has superior biofouling resistance.
vs. Titanium: Titanium is virtually immune to seawater corrosion but is extremely expensive and has poorer heat transfer than copper alloys. Cu-Ni is the "mid-range" option: better corrosion resistance than steel, lower cost than titanium.
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 |
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 |
Application
1. Seawater Heat Exchangers
2. Offshore Oil & Gas Platforms
3. Power Plant Auxiliary Coolers
4. Firewater Systems (Trim Coolers)
5. Hydraulic Oil Coolers
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...
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