Electrical Resistance Heating Wire NiCr3020 NiCr3520 For Furnaces
Why is nichrome wire used in heater?
Nichrome wire is used as a heating element because it is very stable, even at high temperatures.
Unlike other metals, it will not melt even when generating large amounts of heat. Ironically, nichrome actually has low electrical resistance, the property that causes the wire to heat.
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 |
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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.
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A. We keep good quality and competitive price to ensure our customers benefit ;
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