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ASTM B111 C70600-O61 Copper Nickel Low Finned Tube
ASTM B111 C70600-O61 is a specification for copper nickel alloy
tubes with low fins. These tubes are commonly used in heat
exchangers and other applications where efficient heat transfer is
required.
The C70600-O61 designation refers to a specific composition of
copper nickel alloy, which contains approximately 90% copper and
10% nickel. This alloy offers good corrosion resistance, high
thermal conductivity, and excellent resistance to biofouling.
The low finned design of these tubes increases the surface area
available for heat transfer, improving the overall efficiency of
the heat exchanger. The fins are typically formed by a process
called extrusion, where the fins are formed by pressing the tube
through a die.
ASTM B111 is the standard specification for copper and copper alloy
seamless condenser tubes and ferrule stock. It covers various
grades of copper and copper alloys, including copper nickel alloys,
and specifies the dimensions, mechanical properties, and other
requirements for these tubes.
Overall, ASTM B111 C70600-O61 copper nickel low finned tubes are a
popular choice for heat exchangers due to their excellent heat
transfer properties and resistance to corrosion.
C70600 Chemical Composition
C70600 Chemical Composition
| C70600 Chemical Composition | DIN 86019 | EEMUA 144 | BS 2871 | ASTM B466 | JIS H 3300 | MIL-T-16420K |
| Ni% | 9.0-11.0 | 10.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 |
| Fe% | 1.5-1.8 | 1.5-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.0-1.8 |
| Mn% | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 | Max.1.0 | 0.2-1.0 | Max.1.0 |
| C% | Max0.05 | Max0.05 | Max0.05 | Max0.05 | Max0.05 | |
| Pb% | Max0.03 | Max0.01 | Max0.01 | Max0.02 | Max0.05 | Max0.02 |
| S% | Max0.015 | Max0.02 | Max0.05 | Max0.02 | Max0.02 | |
| P% | Max0.02 | Max0.02 | Max0.02 | Max0.02 | ||
| Zn% | Max0.15 | Max0.20 | Max0.50 | Max0.50 | Max0.05 | |
| Zr% | Max0.03 | |||||
| Others | Max0.30 | Max0.30 | Max0.30 | |||
| Cu% | Balance | Balance | Balance | Balance | Cu+Ni+Fe+MnMin.99.5 | Min.86.5 |
C70600 Mechanical Properties
| Properties | Metric | Imperial |
| Tensile strength,ultimate | 303-414 MPa | 43900-60000 psi |
| Tensile strength,yield(depending on temper) | 110-393 MPa | 16000-57000 psi |
| Elingation at break(in 254 mm) | 42.00% | 42.00% |
| Machinability(UNS C36000(free-cutting brass)=100%) | 20% | 20% |
| Shear modulus | 52.0 GPa | 7540 ksi |
| Poisson's ratio | 0.34 | 0.34 |
| Elastic modulus | 140 GPa | 20300 ksi |
Application:
Air Cooler, Charge Air Chiller, Condenser, Evaporator, Fluid
Cooler, Gas Cooler, Oil Cooler, Radiator, Refrigeration, Steam to
Air Heat Exchanger, superheater etc.
