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CuNi30
(Common Name:CuNi30,NC35.Cu70Ni30)
CuNi30 is a copper-nickel alloy (Cu70Ni30 alloy) with low resistivity for use at temperatures up to 350°C.
CuNi30 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.
CuNi30 is typically used for low-temperature applications such as heating cables.
Normal composition%
Nickel
30
Manganese
0.5
Copper
Bal.
Typical Mechanical properties(1.0mm)
Yield strength
Tensile Strength
Elongation
Mpa
Mpa
%
200
400
25
Typical Physical properties
Density (g/cm3)
8.9
Electrical resistivity at 20℃ (Ωmm2/m)
0.35
Temperature factor of resistivity(20℃~600℃)X10-5/℃
<10
Conductivity coefficient at 20℃ (WmK)
27
EMF vs Cu(μV/℃ )(0~100℃ )
-37
Coefficient of thermal expansion
Temperature
Thermal Expansion x10-6/K
20 ℃- 400℃
17
Specific heat capacity
Temperature
20℃
J/gK
0.390
Melting point (℃)
1170
Max continuous operating temperature in air (℃)
350
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
CuNi30
good
good
good
good
bad
good
Style of supply
Alloys Name
Type
Dimension
CuNi30W
Wire
D=0.06mm~8mm
CuNi30R
Ribbon
W=0.4~40
T=0.05~2.9mm
CuNi30S
Strip
W=8~200mm
T=0.1~3.0
CuNi30F
Foil
W=6~120mm
T=0.005~0.1
CuNi30B
Bar
Dia=8~100mm
L=50~1000