ASTM B111 UNS C12200 / CW024A Copper Alloy Seamless Condenser Tubing
Phosphorus-Deoxidized copper tubes (DHP) – UNS C12200 / CW024A
ASTM B111 C12200 seamless tubes are phosphorus-deoxidized copper (DHP) components renowned for exceptional thermal conductivity (~350 W/m·K), corrosion resistance in freshwater/steam environments, and high-pressure integrity due to their seamless construction. Primarily used in heat exchangers, condensers, and HVAC systems, they offer superior formability and weldability in annealed temper (O60), though velocity must be capped at 2.4 m/s to prevent erosion-corrosion. While cost-effective for non-marine applications, they are incompatible with ammonia, high chlorides, or H₂S environments, where alternatives like Cu-Ni alloys are mandated.
ASTM B111 UNS C12200 Seamless Copper Tube Specifications
| Grade | USA | U.K | Germany | Japan |
| China BG | ASTM | BS | DIN | JIS H |
| T 2 | C11000 | C101 / C102 | E-Cu58 | C1100 |
| TP 2 | C12200 | C106 | SF-Cu | C1220 |
Related Standards
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ASME SB-111: Equivalent to ASTM B111 for ASME pressure vessel code.
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EN 12451: European standard for copper heat exchanger tubes.
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JIS H3300: Japanese equivalent (C1220T alloy).
Temper:
1.Copper tubes shall be furnisher in the temper designations identified in specification
2.Drawn tempers H55 and H80
3.Annealed temper O61
4.Drawn and stress-relieved temper HR50
5.Copper tubes for ferrule stock shall be annealed sufficiently to be fully recrystallized.
Chemmical Requirements
ASTM B111 UNS C12200 Seamless Copper Tube Chemical Compositions
| | Elements |
| Cu | P |
| Min (%) | 99.9 | 0.015 |
| Max (%) | - | 0.04 |
Mechincal Properties
| Form | Temper | Temper Code | Tensile Strength (ksi) | YS-0.5% Ext (ksi) | Elongation (%) | Rockwell B scale | Rockwell F scale | Rockwell 30T scale | Shear Strength (ksi) | Fatigue Strength (ksi) | Section Size (in) | Cold Work (%) |
| Pipe | Hard | H04 | 50 Typ | | 10 Typ | 50 Typ | 90 Typ | | 28 Typ | | | 30 |
| Tube | Hard Drawn | H80 | 55 Typ | | 8 Typ | 60 Typ | 95 Typ | 63 Typ | 29 Typ | 19 Typ | 0.065 | 40 |
| Light Drawn, Light Cold Rolled | H55 | 40 Typ | 32 Typ | 25 Typ | 35 Typ | 77 Typ | 45 Typ | 26 Typ | 14 Typ | 0.065 | 15 |
| Nominal Grain Size 0.025 mm | OS025 | 34 Typ | 11 Typ | 45 Typ | | 45 Typ | | 23 Typ | | 0.065 | |
| Nominal Grain Size 0.050 mm | OS050 | 32 Typ | 10 Typ | 45 Typ | | 40 Typ | | 22 Typ | 11 Typ | 0.065 | |
Advantages of ASTM B111 C12200 Seamless Copper Tube
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Corrosion Resistance: Resists pitting/stress corrosion in freshwater/steam.
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Thermal Efficiency: Optimal for heat transfer applications.
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Pressure Integrity: Seamless design handles high pressures.
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Formability/Weldability: Easy to bend, braze, or solder.
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Long Service Life: Low maintenance in compatible environments.
Applications
1. Air conditioning and refrigeration.
2. Gas, heater, and oil burner lines.
3. Plumbing pipe and steam tubes.
4. Brewery and distillery tubes.
5. Gasoline, hydraulic, and oil lines.
6. Rotating bands.
7. Condenser, evaporator & heat exchanger tubes.
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ASTM B111 UNS C12200 / CW024A Seamless Copper Tube DHP Heat Exchanger Tube Images
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