Copper Tubes, Copper Alloy Tubes are widely used in applications of air conditioner, refrigeration, heat exchanger, petroleum industry, power station etc. We as one of leading manufacturers in China to provide one stop solution in tubing industry for customers devote to fabricating seamless copper alloy tubes for industrial applications in serious corrosion and special high temperature environments. Types of Copper material are C10100,C44300.C68700.C70600,C71500 etc.
C68700 Al-Brass Copper Tube Copper Pipe
UNS C68700 (aluminum brass)
C68700 (CZ110 Aluminium Brass Alloy B),
C71500 (70-30 Copper-Nickel),
C70600 (90-10 Copper-Nickel).
Copper and Copper-Alloy Seamless Condenser Tubes and Ferrule Stock
ASTM B165/ASME SB165
Nickel-Copper Alloy(UNS N04400) Seamless Tube and Pipe
ASTM B135/ASME SB135
Standard Specification for Seamless Brass Tube
ASTM B88/ASME SB88
Seamless Copper Water Tube
COPPER NICKEL HEAT RESISTANCE
The hot strength of copper increases with only a small addition of nickel. By adding iron,
mechanical properties are improved, not only at room temperature, but also at elevated temperatures.
10% Ni. CuNi10Fe1Mn, for example, can be used in pressure vessel construction up to 300°C,
CuNi30Mn1Fe up to 350°C. Above these limit temperatures, strength drops markedly, particularly the creep strength and creep strain limit.
COPPER NICKEL HEAT TREATMENT
In general, heat treatments are only used with Cu-Ni alloys for soft annealing and stress relieving.
Temperatures for recrystallisation annealing can vary over wide limits between about 620 and 900°C,
depending on degree of cold work, nickel content and additional constituents. High temperatures are
associated with short annealing times (continuous annealing) and low temperatures with long annealing times (static annealing).
Stress-relief annealing is carried out at 280 to 500°C. It is advisable to anneal excluding air or in a slightly reducing atmosphere,
to avoid the pickling that is required with air-containing annealing.