Sheet, strip, foil made of cupronickel
Cupronickel is a single-phase copper-nickel alloy of silver color. It is characterized by good processability in cold and hot condition. After annealing, alloy strength is 40 kgf/mm2. Alloy possesses good corrosive resistance in a humid atmosphere, sea and fresh water. That is why it is used in shipbuilding for manufacture of various details. Copper-nickel alloys (despite nickel insufficiency) are widely used in electrical engineering. High content of nickel and additives of ferrum and manganese provide an extra corrosive and cavitation resistance. It is particularly important in sea water and atmosphere of water steam.
Percentage composition of CuNi30Fe1Mn1, GOST 492−2006
Percentage composition of Cu19Ni according to GOST 492−2006
|78,5−82||18−20||0,5−1||≤0,5||≤ 0,3||≤0,15||≤0,005||≤0,05||≤0,01||≤ 0,1||≤0,01||≤0,005||≤0,002||≤ 1,5|
The most widespread semi-fabricates made of cupronickel: sheet, wire, foil, strip. They are used in manufacture of jewellery, utensils, thermogeneator.
Casting-processing properties of CuNi30Fe1Mn1
1) Melting point is +1260 °C;
2) Temperature of hot working is 800 — 1150 °C;
3) Annealing temperature of material is 800−850 °C.
Mechanical characteristics of alloy
1) Hardness of CuNi30Fe1Mn1, soft alloy — HB 10 -1 = 75 — 90 MPa.
2) Hardness of CuNi30Fe1Mn1- hard alloy — HB 10 -1 = 155 MPa.
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