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Shanghai Tankii Alloy Material Co.,Ltd
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Spiral Electric Resistor Nicr Alloy 1 - 5 Mohm For Air Conditioner Heating

Shanghai Tankii Alloy Material Co.,Ltd
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Spiral Electric Resistor Nicr Alloy 1 - 5 Mohm For Air Conditioner Heating

Brand Name : TANKII
Model Number : 6J40
Certification : ISO9001:2008
Place of Origin : Shanghai, China
MOQ : 50kg
Price : To negotiate
Payment Terms : L/C, T/T, Western Union, Paypal
Delivery Time : 7-12 days
Packaging Details : Carton, Plywood case as clients´ requirements
Supply Ability : 100+TON+MONTH
Material : Constantan
Composition : Cu Ni
Shape : Spiral/ Spring or As Customs demanded
Conductivity : High
Application : Air Conditioner Heating Elements
Resistance Range : 1-5 mOhm
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Spiral Electric Resistor Nicr Alloy 1 - 5 Mohm For Air Conditioner Heating Elements


1.Material General Description

Constantan is a copper-nickel alloy also known as Eureka, Advance, and Ferry. It usually consists of 55% copper and 45% nickel. Its main feature is its resistivity, which is constant over a wide range of temperatures. Other alloys with similarly low temperature coefficients are known, such as manganin (Cu86Mn12Ni2).


For the measurement of very large strains, 5% (50 000 microstrian) or above, annealed constantan (P alloy) is the grid material normally selected. Constantan in this form is very ductile; and, in gauge lengths of 0.125 inches (3.2 mm) and longer, can be strained to >20%. It should be borne in mind, however, that under high cyclic strains the P alloy will exhibit some permanent resistivity change with each cycle, and cause a corresponding zero shift in the strain gauge. Because of this characteristic, and the tendency for premature grid failure with repeated straining, P alloy is not ordinarily recommended for cyclic strain applications. P alloy is available with S-T-C numbers of 08 and 40 for use on metals and plastics, respectively.


2. Spring Introduction and applications


A spiral torsion spring, or hairspring, in an alarm clock.

A volute spring. Under compression the coils slide over each other, so affording longer travel.

Vertical volute springs of Stuart tank

Tension springs in a folded line reverberation device.

A torsion bar twisted under load

Leaf spring on a truck
Springs can be classified depending on how the load force is applied to them:

Tension/extension spring – the spring is designed to operate with a tension load, so the spring stretches as the load is applied to it.
Compression spring – is designed to operate with a compression load, so the spring gets shorter as the load is applied to it.
Torsion spring – unlike the above types in which the load is an axial force, the load applied to a torsion spring is a torque or twisting force, and the end of the spring rotates through an angle as the load is applied.
Constant spring - supported load remains the same throughout deflection cycle.
Variable spring - resistance of the coil to load varies during compression.
Variable stiffness spring - resistance of the coil to load can be dynamically varied for example by the control system,some types of these springs also vary their length thereby providing actuation capability as well.
They can also be classified based on their shape:

Flat spring – this type is made of a flat spring steel.
Machined spring – this type of spring is manufactured by machining bar stock with a lathe and/or milling operation rather than a coiling operation. Since it is machined, the spring may incorporate features in addition to the elastic element. Machined springs can be made in the typical load cases of compression/extension, torsion, etc.
Serpentine spring - a zig-zag of thick wire - often used in modern upholstery/furniture.


3.Chemical Composition and Main Property of Cu-Ni Low Resistance Alloy

PropertiesGrade
CuNi1
CuNi2
CuNi6
CuNi8
CuMn3
CuNi10
Main Chemical Composition
Ni
1
2
6
8
_
10
Mn
_
_
_
_
3
_
Cu
Bal
Bal
Bal
Bal
Bal
Bal
Max Continuous Service Temperature(oC)
200
200
200
250
200
250
Resisivity at 20oC (Ωmm2/m)
0.03
0.05
0.10
0.12
0.12
0.15
Density(g/cm3)
8.9
8.9
8.9
8.9
8.8
8.9
Thermal Conductivity(α×10-6/oC)
<100
<120
<60
<57
<38
<50
Tensile Strength(Mpa)
≥210
≥220
≥250
≥270
≥290
≥290
EMF vs Cu(μV/oC)(0~100oC)
-8
-12
-12
-22
_
-25
Approximate Melting Point( oC)
1085
1090
1095
1097
1050
1100
Micrographic Structure
austenite
austenite
austenite
austenite
austenite
austenite
Magnetic Property
non
non
non
non
non
non

PropertiesGrade
CuNi14
CuNi19
CuNi23
CuNi30
CuNi34
CuNi44
Main Chemical Composition
Ni
14
19
23
30
34
44
Mn
0.3
0.5
0.5
1.0
1.0
1.0
Cu
Bal
Bal
Bal
Bal
Bal
Bal
Max Continuous Service Temperature(oC)
300
300
300
350
350
400
Resisivity at 20oC (Ωmm2/m)
0.20
0.25
0.30
0.35
0.40
0.49
Density(g/cm3)
8.9
8.9
8.9
8.9
8.9
8.9
Thermal Conductivity(α×10-6/oC)
<30
<25
<16
<10
<0
<-6
Tensile Strength(Mpa)
≥310
≥340
≥350
≥400
≥400
≥420
EMF vs Cu(μV/oC)(0~100oC)
-28
-32
-34
-37
-39
-43
Approximate Melting Point( oC)
1115
1135
1150
1170
1180
1280
Micrographic Structure
austenite
austenite
austenite
austenite
austenite
austenite
Magnetic Property
non
non
non
non
non
non


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oven heating element

      

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