YUHONG HOLDING GROUP CO., LTD
| WT | BWG 25, 22, 20, 18 ... 10 |
| Process | Cold Drawn |
| 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 C68700 / CuZn20Al2 / 2.0460 |
| Length | Single Random, Double Random & Cut Length |
| OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| Delivery Time | 7days |
| Standard | ASTM B111, ASME SB111 |
| High Light | ASTM B111 UNS C68700 Aluminum Brass Tube, CuZn20Al2 Heat Exchanger Tube |
| Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| Production Name | Heat Exchanger Tube |
| Place of Origin | CHINA |
| Model Number | ASTM B111 UNS C68700 Aluminum Brass Tube |
| Brand Name | YUHONG |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
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Product Specification
| WT | BWG 25, 22, 20, 18 ... 10 | Process | Cold Drawn |
| 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 C68700 / CuZn20Al2 / 2.0460 |
| Length | Single Random, Double Random & Cut Length | OD | 1/4" , 3/8", 1/2", 5/8", 3/4", 1", 1.1/4", etc. |
| Delivery Time | 7days | Standard | ASTM B111, ASME SB111 |
| High Light | ASTM B111 UNS C68700 Aluminum Brass Tube, CuZn20Al2 Heat Exchanger Tube | Application | Boiler, Heat Exchanger, Oil and Gas Plant, Cooling, Condenser |
| Production Name | Heat Exchanger Tube | Place of Origin | CHINA |
| Model Number | ASTM B111 UNS C68700 Aluminum Brass Tube | Brand Name | YUHONG |
| Certification | ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008 |
ASTM B111 UNS C68700 / CuZn20Al2 Aluminum Brass Tube Seamless Copper Alloy Tubing
ASTM B111 UNS C68700/ CuZn20Al2 Aluminum Brass Tube is not a generic "seawater brass" but a delicately balanced, arsenic‑stabilised, single‑phase alloy whose performance hinges on strict control of residual stress, ammonia exposure, and thermal cycling – and its selection is often a compromise between erosion resistance and fabricability/thermal efficiency, rather than an outright upgrade over UNS C44300.
C44300 (Admiralty) vs. C68700 (Aluminum Brass) – Differences:
Composition: C44300 = Cu-Zn-Sn-As (Tin-based); C68700 = Cu-Zn-Al-As (Aluminum-based).
Strength: C68700 is ~20-30% stronger (higher tensile/yield strength).
Corrosion: C68700 has far superior resistance to erosion, impingement attack (high-velocity seawater), and stress corrosion cracking. C44300 is good for general seawater but softer.
Fabrication: C44300 has better cold workability – easier for bending, flaring, and tight-radius forming.
Equivalent Grades of ASTM B111 Brass Tube Copper Alloy Heat Exchanger Tube
| Material Designation | Corresponding Material Symbol | ||||
| GB/T8890 | ASTM B111 | BS2871 | JIS H3300 | DIN1785 | |
| Aluminums Brass | HAL77-2 | UNS C68700 | CZ110 | C6870T | CuZn20Al2 |
| Admiralty Brass | HSn70-1 | UNS C44300 | CZ111 | C4430T | CuZn28Sn1 |
Chemical Composition of ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy Heat Exchanger Tube
| 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 |
Tensile Requirements of ASTM B111 UNS C68700 Aluminum Brass Tube CuZn20Al2 Copper Alloy Heat Exchanger Tube
| 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 |
How to Choose the correct brass alloy material?
Choose C68700 if: High water flow rates (>2 m/s), turbulent seawater, elevated temperatures, or power plant/heat exchanger tubes.
Choose C44300 if: Moderate/gentle flow conditions, complex cold bending/shaping is required, or you need a more cost-effective option for standard condensers.
Application
Condenser and Heat Exchanger Tubes in:
Power Plants (fossil fuel, nuclear - for the main surface condenser)
Marine Vessels (shipboard condensers, oil coolers)
Desalination Plants (Multi-Stage Flash and Multi-Effect Distillation heat recovery sections)
Offshore Platforms (cooling systems)
Chemical and Petrochemical Processing 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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