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| Tên thương hiệu: | YUHONG |
| Số mẫu: | Ống uốn chữ U bằng đồng thau nhôm ASTM B111 UNS C68700 |
| MOQ: | 1000KGS |
| Giá cả: | có thể đàm phán |
| Chi tiết bao bì: | Vỏ gỗ / Vỏ sắt / Bó có nắp nhựa |
| Điều khoản thanh toán: | L/C,T/T |
ASTM B111 UNS C68700 / CuZn20Al2 / 2.0460 Aluminum Brass U Bend Heat Exchanger Tube
YUHONG GROUP is specialized in supplying heat exchanger tubes, boiler tubes and condenser tubes in China. The available materials we can offer including carbon steel, stainless steel, duplex steel, alloy steel, copper, nickel alloys, which can satisfy your different project rquirements. ASTM B111 C68700 / CuZn20Al2 / 2.0460 is a medium-cost, seawater-resistant aluminum brass ideal for U-bundle heat exchangers. Its key strength is resistance to impingement attack and dezincification due to aluminum and arsenic. Use it for clean to moderately polluted seawater or brackish water at velocities up to 3 m/s. Ensure proper post-bend stress relief and NDT (ET) to guarantee U-bend integrity.
Equivalent Grades of ASTM B111 UNS C68700 Seamless Aluminum Brass U Bend Heat Exchanger Tube
| 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 |
Chemical Composition of ASTM B111 UNS C68700 Seamless Aluminum Brass U Bend 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 |
| 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 of ASTM B111 UNS C68700 Seamless Aluminum Brass U Bend 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 |
| C70400 | H55 | light-drawn | 38 | 30 |
| C70600 | H55 | light-drawn | 45 | 15 |
| C71500 | O61 | annealed | 52 | 18 |
| C71640 | O61 | annealed | 63 | 25 |
Application
Power Plants: Seawater-cooled condensers, auxiliary coolers, and moisture separator reheaters (MSR).
Desalination Plants: Multi-Stage Flash (MSF) and Multi-Effect Distillation (MED) evaporators (low-temperature stages).
Marine Engineering: Shipboard heat exchangers, coolers for diesel engines.
Chemical/Petrochemical: Heat exchangers with brackish or saline cooling water.
HVAC: Large seawater-cooled chillers.
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