ASTM B395 / ASME SB395 C68700 U Bend Copper Alloy Tube For Heat Exchanger
ASTM B395/ ASME SB395 C68700 U Bend Copper & Copper Alloy Tube For Heat Exchanger
Copper and copper alloy U-bends are widely used in heat exchangers, condensers and cooling systems
Pure copper (UNS C12200/C10200)
Excellent thermal/electrical conductivity (thermal conductivity ~400 W/m·K).
Resistant to oxidizing acids (such as dilute sulfuric acid) and non-oxidizing environments.
Aluminum brass (UNS C68700)
Composition: Cu-Zn-Al (aluminum 1.5-2.5%).
Excellent resistance to seawater dezincification corrosion (Dezincification).
Inhibits biofouling and is suitable for marine environments.
Navy brass (UNS C44300/C44400)
Composition: Cu-Zn-Sn (tin 0.8-1.2%) + trace arsenic/antimony.
Resistant to seawater corrosion and better erosion resistance than pure copper.
Lower cost than copper-nickel alloy.
Copper-nickel alloy (e.g. C70600 90/10, C71500 70/30)
Composition: Cu-Ni-Fe (C70600: Ni 10%, Fe 1.5%).
Resistant to high-speed seawater erosion (≤4 m/s) and hydrogen sulfide corrosion.
Anti-biological fouling, high strength (tensile strength ~450 MPa).
Phosphor bronze (UNS C51000)
Composition: Cu-Sn-P (tin 5%, phosphorus 0.1-0.3%).
High strength, fatigue resistance, suitable for vibration environment.
Resistant to seawater and alkaline media.
Description
Corrosion Resistance:
Superior resistance to seawater, biofouling, and dezincification due to aluminum content.
Outperforms plain brass in saline and brackish environments.
Thermal Conductivity: High heat transfer efficiency for condenser/heat-exchanger systems.
Formability: U-bend geometry allows compact design in heat exchangers; annealed tubes resist cracking during bending.
| Applicable Specifications | |||||
| Form | Specific Sub-Form | Application | System | Standard | Description |
| Condenser & Heat Exchanger Tube with Integral Fins | ASME | SB956 | Tube, Welded, Condenser, Heat Exchanger, w/ Integral Fins | ||
| ASTM | B956/B956M | WELDED COPPER AND COPPER-ALLOY CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS | |||
| Seamless Condenser Tube & Ferrule Stock | ASTM | B111/B111M | COPPER AND COPPER ALLOY SEAMLESS CONDENSER TUBES AND FERRULE STOCK | ||
| ASME | SB111 | COPPER AND COPPER ALLOY SEAMLESS CONDENSER TUBES & FERRULE STOCK | |||
| Seamless Heat Exchanger and Condenser Tube | with Integral Fins | ASME | SB359 | COPPER & COPPER ALLOY SEAMLESS CONDENSER & HEAT EXCHANGER TUBES WITH INTEGRAL FINS | |
| U-Bend | ASTM | B395/B395M | U-BEND SEAMLESS COPPER AND COPPER ALLOY HEAT EXCHANGER AND CONDENSER TUBES | ||
| with Integral Fins | ASTM | B359/B359M | COPPER AND COPPER-ALLOY SEAMLESS CONDENSER AND HEAT EXCHANGER TUBES WITH INTEGRAL FINS | ||
| U-Bend | ASME | SB395 | U-BEND SEAMLESS COPPER & COPPER ALLOY HEAT EXCHANGER & CONDENSER TUBE | ||
| Tube, Welded Heater Exchanger | ASTM | B543/B543M | WELDED COPPER AND COPPER ALLOY HEAT EXCHANGER TUBE | ||
| ASME | SB543 | WELDED COPPER AND COPPER ALLOY TUBE | |||
Industry Application
Shipping and marine engineering Seawater condenser, cooler U-tube bundle High salt spray, biofouling, long-term immersion
Thermal/nuclear power plant Steam surface condenser, feedwater heater High temperature steam, circulating cooling water
Desalination plant Multistage flash (MSF) evaporator tube High temperature, high salt, chloride ion corrosion
Chemical equipment Acid-base medium heat exchanger (non-strong oxidizing environment) Medium and low concentration corrosive fluids
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