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CuNi19
(Common Name:CuNi19,NC25)
CuNi19 is a copper-nickel alloy (Cu81Ni19 alloy) with low resistivity for use at temperatures up to 300°C.
CuNi19 is kind of low resistance heating alloy.It is one of the key materials of the low-voltage electrical products. It is widely used in low-voltage circuit breaker, electric blankets.thermal overload relay, and other low-voltage electrical product.
CuNi19 is typically used for low-temperature applications such as heating cables.
Normal composition%
Nickel
19
Manganese
0.5
Copper
Bal.
Typical Mechanical properties(1.0mm)
Yield strength
Tensile Strength
Elongation
Mpa
Mpa
%
155
340
25
Typical Physical properties
Density (g/cm3)
8.9
Electrical resistivity at 20℃ (Ωmm2/m)
0.25
Temperature factor of resistivity(20℃~600℃)X10-5/℃
<25
Conductivity coefficient at 20℃ (WmK)
38
EMF vs Cu(μV/℃ )(0~100℃ )
-32
Coefficient of thermal expansion
Temperature
Thermal Expansion x10-6/K
20 ℃- 400℃
17.5
Specific heat capacity
Temperature
20℃
J/gK
0.380
Melting point (℃)
1135
Max continuous operating temperature in air (℃)
300
Magnetic properties
non-magnetic
Corrosion resistance performance
Alloys
Working In atmosphere at 20℃
Working at max temperature 200℃
Air and oxygen contain
gases
gases with Nitrogen
gases with sulfur
oxidability
gases with sulfur
reductibility
carburization
CuNi19
good
general
general
general
bad
good
Style of supply
Alloys Name
Type
Dimension
CuNi19W
Wire
D=0.06mm~8mm
CuNi19R
Ribbon
W=0.4~40
T=0.05~2.9mm
CuNi19S
Strip
W=8~200mm
T=0.1~3.0
CuNi19F
Foil
W=6~120mm
T=0.005~0.1
CuNi19B
Bar
Dia=8~100mm
L=50~1000