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Nichrome 70 Resistance Alloy Wire/Strip
Nichrome 70 is a nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1250℃. The alloy is characterized by high resistivity, good oxidation resistance and very good form stability. It has good ductility after use and excellent weldability.
* Similar grade
|
Trademarks |
GB |
JIS |
ASTM |
UNS |
DIN |
W.Nr |
GOST |
Kanthal |
|
STABLOHM 710 RESISTOHM 70 Nichrome 70 Chromel 70/30 Tophet 30 GILPHY 70 N7 |
Cr30Ni70 |
- |
- |
UNS N06008 |
NiCr70 30 |
2.4658 |
ХН70Ю |
Nikrothal 70 |
* Specification
GB/T 1234-1995 (CN); JIS C2520-199(JP); ASTM B344-01(USA); DIN 17470-1984(GER); GOST 10994 & GOST 12766/1-1990 (RU)
* Product form
Wire, Mesh, Conveyor belt, Ribbon, Strip, Rod, Sheet, Tube, Radiant tube heater
* Chemical composition, %
|
C |
P |
S |
Mn |
Si |
Cr |
Ni |
Al |
Fe |
|
≤0.08 |
≤0.02 |
≤0.015 |
≤0.60 |
0.75~1.60 |
28.0~31.0 |
Bal |
≤0.50 |
≤1.0 |
* Mechanical property (Annealed)
|
Tensile strength, Rm/MPa |
Elongation, A/% |
|
|
Dia. >3.00mm (for wire) |
Dia. 0.10~3.00mm (for wire) and Th. >0.20 (for strip) |
|
|
≥650 |
≥25 |
≥20 |
* Physical property
|
Max working temperature, ℃ |
Melting point, ℃ |
Density, g/cm3 |
Resistivity, μΩ·m, 20℃ |
Specific heat, J/g·℃ |
Thermal conductivity, KJ/m·h·℃ |
Average coefficient of linear expansion, α×10-6/℃ （20~1000℃） |
Micrographic structure |
Magnetic properties |
|
1250 |
1380 |
8.1 |
1.18 |
0.461 |
45.2 |
17.0 |
Austenitie |
Non-Magnetic |
* Life test
|
Test temperature, ℃ |
Continuous service time Hours, ℃ |
|
1250 |
≥50 |
* Temperature factor of resistivity
|
20℃ |
100℃ |
200℃ |
300℃ |
400℃ |
500℃ |
600℃ |
700℃ |
800℃ |
900℃ |
1000℃ |
1100℃ |
1200℃ |
1300℃ |
|
1.000 |
1.007 |
1.016 |
1.028 |
1.038 |
1.044 |
1.036 |
1.030 |
1.028 |
1.029 |
1.033 |
1.037 |
1.043 |
- |
* Feature
Nichrome 70 withstands temperatures up to 1250°C
* Application
Used for corrosion resistant electric heating elements in industrial furnaces with reducing atmospheres. Highly resistant to "green rot" – a preferential intergranular oxidation of the chromium that is commonly experienced with other alloys under certain environmental conditions. Highly resistant to oxidation in air. Not recommend for use in MgO sheathed heating elements, or applications using nitrogen or carburizing atmospheres.
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