NiCr Alloy Electrical Resistance Heating Wire NiCr8020 For Heater Furnaces
Resistance wire is wire intended for making electrical resistors (which are used to control the amount of current in a circuit). It is better if the alloy used has a high resistivity, since a shorter wire can then be used.
How does a resistance wire work?
The moving electrons can collide with the ions in the metal.
This makes it more difficult for the current to flow, and causes resistance.
The resistance of a long wire is greater than the resistance of a short wire because electrons collide with more ions as they pass through.
Main Characteristics of Ni-Cr and Ni-Cr-Fe Electric Heating Alloys
| Alloy Nomenclature Performance | Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 |
| Main Chemical Composition | Ni | Rest | Rest | 55-61 | 34-37 | 30-34 |
| Cr | 20-23 | 28-31 | 15-18 | 18-21 | 18-21 |
| Fe | ≤1.0 | ≤1.0 | Rest | Rest | Rest |
| Max. continuous service temp. of element | 1200 | 1250 | 1150 | 1100 | 1100 |
| Resistivity at 20ºC (μΩ·m) | 1.09 | 1.18 | 1.12 | 1.00 | 1.04 |
| Density (g/cm 3 ) | 8.40 | 8.10 | 8.20 | 7.90 | 7.90 |
| Thermal conductivity (KJ/m·h·ºC) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 |
| Coefficient of lines expansion (α×10 -6 /ºC) | 18.0 | 17.0 | 17.0 | 19.0 | 19.0 |
| Melting point (approx.) (ºC) | 1400 | 1380 | 1390 | 1390 | 1390 |
| Elongation at rupture (%) | >20 | >20 | >20 | >20 | >20 |
| Micrographic structure | Austenlte | Austenlte | Austenlte | Austenlte | Austenlte |
| Magnetic properties | Nonmagnetic | Nonmagnetic | Weak Magnetic | Weak Magnetic | Weak Magnetic |
| No. | Spool Model | Outer Diameter
(d1) | Trunk
Diameter(d2) | Inner
Diameter(d3) | Inner Height(L2) | Total height
(L1) | Weight of Spool | Rated load weight |
| 1 | DIN 125 | 125mm | 65mm | 20-25mm | 100mm | 120mm | 0.18kg | 2-3kg |
| 2 | DIN 160 | 160mm | 99.3mm | 22.03mm | 129mm | 160mm | 0.3kg | 5-7kg |
| 3 | DIN 200 | 200mm | 125.31mm | 23.06mm | 160mm | 200mm | 0.62-0.66kg | 10-15kg |
| 4 | DIN 250 | 250mm | 160mm | 20.73mm | 160mm | 200mm | 1kg | 20-25kg |
| 5 | NS-4 | 118.83mm | 75.4mm | 21.27mm | 129.33mm | 148.14mm | | 2-3kg |
1. How can I get a quotation from you?
You can leave us message or send us a email and we will reply every message in time.
Or we may talk on line by skype & wechat.
And you can also find our contact information on contact page.
2. Can I get samples before order?
Yes, of course. Can send you small piece for you to check quality.
3. What is your delivery time?
A. The time of delivery is usually around 7-25 days according to the products you need.
4. What is your payment terms?
Our usual payment term is 30% deposite, and rest against B/L.
L/C is also acceptatble .
5. How can you garantee what I got will be good?
First of all, the material origin in TISCO, JISCO, etc and we can offer MTC from the steel mill.
Also, we accept third-party test.
6. How do you make our business long-term and good relationship?
A. We keep good quality and competitive price to ensure our customers benefit ;
B. We respect every customer as our friend and we sincerely do business and make friends with them no matter where they come from
Looking for resistance wire supplier ? We have a wide selection at good prices to help you get creative. All the resistance wires are quality guaranteed. We are China Origin Factory of resistance wire. If you have any question, please feel free to contact us.
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