Chromel 70/30 N7 Hytemco Nicr70/30 Wire for Tubular heaters
Common trade names NiCr 70/30, Resistohm 70, Nikrothal 70, Chromel
70/30, HAI-NiCr 70, Cronix 70, Inalloy 70, X30H70.
NiCr 70 30 (2.4658) is an austenitic nickel-chromium alloy (NiCr alloy) for
use at temperatures up to 1250°C. The 70/30 alloy is characterized
by high resistivity and good oxidation resistance. It has good
ductility after use and excellent weldability.
with Whole Sale Price Ni70cr30 Wire Nicr70/30 Wire for Tubular
heaters
| Propertes/Grade |
NiCr 80/20 |
NiCr 70/30 |
NiCr 60/15 |
NiCr 35/20 |
NiCr 30/20 |
Main Chemical Composition(%) |
Ni |
Bal. |
Bal. |
55.0-61.0 |
34.0-37.0 |
30.0-34.0 |
|
Cr |
20.0-23.0 |
28.0-31.0 |
15.0-18.0 |
18.0-21.0 |
18.0-21.0 |
|
Fe |
≤ 1.0 |
≤ 1.0 |
Bal. |
Bal. |
Bal. |
Max Working Temperature(ºC) |
1200 |
1250 |
1150 |
1100 |
1100 |
Resistivity at 20ºC
(μ Ω · m) |
1.09 |
1.18 |
1.12 |
1.04 |
1.04 |
Density(g/cm3) |
8.4 |
8.1 |
8.2 |
7.9 |
7.9 |
Thermal Conductivity
(KJ/m· h· ºC) |
60.3 |
45.2 |
45.2 |
43.8 |
43.8 |
Coefficient of Thermal Expansion(α × 10-6/ºC) |
18 |
17 |
17 |
19 |
19 |
Melting Point(ºC) |
1400 |
1380 |
1390 |
1390 |
1390 |
Elongation(%) |
> 20 |
> 20 |
> 20 |
> 20 |
> 20 |
Micrographic Structure |
austenite |
austenite |
austenite |
austenite |
austenite |
Magnetic Property |
nonmagnetic |
nonmagnetic |
nonmagnetic |
nonmagnetic |
nonmagnetic |
Product Description
Grade: Ni80Cr20 ,also called Nikrothal 8,MWS-650,NiCrA,Tophet
A,HAI-NiCr 80,Chromel A,Alloy A,N8,Resistohm 80, Stablohm
650,Nichorme V,Nikrothal 80 etc.
Chemical Content(%)
| C | P | S | Mn | Si | Cr | Ni | Al | Fe | Other |
| Max |
| 0.03 | 0.02 | 0.015 | 0.60 | 0.75~1.60 | 20.0~23.0 | Bal. | Max 0.50 | Max 1.0 | - |
Mechanical Properties of nichrome wire
| Max Continuous Service Temperature: | 1200ºC |
| Resisivity 20ºC: | 1.09 ohm mm2/m |
| Density: | 8.4 g/cm3 |
| Thermal Conductivity: | 60.3 KJ/m·h·ºC |
| Coefficient of Thermal Expansion: | 18 α×10-6/ºC |
| Melting Point: | 1400ºC |
| Elongation: | Min 20% |
| Micrographic Structure: | Austenite |
| Magnetic Property: | nonmagnetic |
Temperature Factors Of Electrical Resistivity
| 20ºC | 100ºC | 200ºC | 300ºC | 400ºC | 500ºC | 600ºC |
| 1 | 1.006 | 1.012 | 1.018 | 1.025 | 1.026 | 1.018 |
| 700ºC | 800ºC | 900ºC | 1000ºC | 1100ºC | 1200ºC | 1300ºC |
| 1.01 | 1.008 | 1.01 | 1.014 | 1.021 | 1.025 | - |
Regular size of Nickel alloy wire :
We supply products in the shape of wire,flat wire,strip.We can also
make customized material according to useris requests.
Bright and white wire--0.025mm~3mm
Pickling wire:1.8mm~10mm
Oxidized wire:0.6mm~10mm
Flat wire:thickness 0.05mm~1.0mm,width 0.5mm~5.0mm
Process:
Wire:Material preparation→melting→re-melting→forging→hot
rolling→heat treatment→surface treatment→drawing(rolling)→finish
heat treatment→inspection→package→warehouse
Product features of nichrome wire:
1)Excellent anti-oxidation and mechanical strength at high
temperature;
2)High resistivity and low temperature coefficient of resistance;
3)Excellent reelability and forming performance;
4)Excellent welding performace
Application of all grades:
Cr20Ni80:in braking resistors,industrial furnaces,flat irons,
ironing machines, water heaters, plastic moulding dies, soldering
irons, metal sheathed tubular elements and cartridge elements.
Cr30Ni70:in industrial furnaces. well suited for reducing
atmospheres, as it is not subject to 'green rot'.
Cr15Ni60:in braking resistors,industrial furnaces,hot plates,
grills, toaster ovens and storage heaters. For suspended coils in
air heaters in clothes dryers, fan heaters, hand dryers.
Cr20Ni35:in braking resistors,industrial furnaces.In night-storage
heaters, convection heaters, heavy duty rheostats and fan heaters.
For heating cables and rope heaters in defrosting and de-icing
elements, electric blankets and pads, car seats, baseboard heaters
and floorheater.
Cr20Ni30:in solid hot plates, open coil heaters in HVAC systems,
night-storage heaters, convection heaters, heavy duty rheostats and
fan heaters.For heating cables and rope heaters in defrosting and
de-icing elements, electric blankets and pads, car seats, baseboard
heaters, floor heaters and resistors.
