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ASTM B111 C70600 O61 refers to the standard specification for seamless copper-nickel alloy condenser and heat exchanger tubes. The alloy C70600, also known as CuNi 90/10, is composed of 90% copper and 10% nickel. It is often used in applications requiring good corrosion resistance and thermal conductivity, such as marine engineering, offshore oil and gas platforms, and power plants. The "O61" designation refers to an annealed condition, indicating that the tubes are heat treated to improve their mechanical properties.
Low finned tubes basically consist of a metal tube. This tube can
be made of different types of metals. Specifically, for low finned
tubes, the low fins offer the advantage that the outer surface of
the metal tube is increased. This is reflected in the fact that the
heat exchanger has a higher capacity than models with bare
tubes.The low finned tubes have an extended surface on the outside
of the tube increasing the efficiency of the heat exchanger. The
low finned tubes are an indispensable part in their production. We
are happy to tell you more about it.
According to user needs, we can produce all kinds of steel strip
winding finned tube and steel aluminum composite finned tube. As
the heat transfer element finned tube works long-term in high
temperature and flue gas condition, such as finned tube in the
boiler heat exchanger which use conditions are as high temperature
and high pressure and corrosive atmosphere, should have a high
performance metrics and they are as follows:Anti-corrosion
,Anti-wear,lower contact resistance ,Higher Stability,Anti-dust
stratification.
This intergral low finned tubes are widely used as heat transfer tubes because of their large external surface area and high heat transfer performance compared with a plain tube. This enhanced surface fin tubes allow our customers to either reduce the size of the heat exchanger or increase its perfornance. The low finned tubes we manufacture are designed to meet the most efficient and durable thermal performance for the most challenging situations and long lasting service life.
Temper | Tensile Str. | Yield Str. | Elong. | Rockwell | |||
B | C | F | 30T | ||||
H55 | 414MPa (60ksi) | 393MPa (57ksi) | 10% | 72 | - | 100 | 70 |
OS025 | 303MPa (44ksi) | 110MPa (16ksi) | 42% | 15 | - | 65 | 26 |
Elements | Content (%) |
Nickel, Ni | 9.0-11.0 |
Iron, Fe | 1.0-1.8 |
Zinc, Zn | 1.0 |
Manganese, Mn | 1.0 |
Lead, Pb | 0.05 |
Copper, Cu | Remainder |
ASME SB111 | ASME SB171 | ASME SB359 | ASME SB466 | ASME SB467 |
ASME SB395 | ASME SB543 | ASTM B111 | ASTM B151 | ASTM B122 |
ASTM B171 | ASTM B359 | ASTM B395 | ASTM B432 | ASTM B466 |
ASTM B469 | ASTM B543 | ASTM B608 | DIN 2.0872 | MIL C-15726 |
MIL T-15005 | MIL T-16420 | MIL T-22214 | SAE J461 | SAE J463 |
Low fin tubes: