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By certification 
Nichrome 20 Resistance Alloy Wire/Strip
Nichrome 20 is an austenitic nickel-chromium alloy (NiCr alloy) for use at temperatures up to 1050℃. The alloy is characterized by high resistivity and moderate oxidation resistance. It has good ductility after use and excellent weldability.
* Similar grade
| Trademarks | GB |
JIS |
ASTM |
UNS |
DIN |
W.Nr |
GOST |
Kanthal |
Nichrome 20 |
Cr25Ni20 |
SUH 310 |
TP 310 |
UNS S31000 |
CrNi25 20 |
1.4843 |
- |
Nikrothal 20 |
* 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 |
≤1.0 |
1.5~3.0 |
24.0~26.0 |
19.0~22.0 |
- |
Bal |
* 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) |
|
≥600 |
≥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 |
1050 |
1380 |
7.90 |
0.95 |
0.500 |
43.8 |
19.0 |
Austenitie |
Weak-Magnetic |
* Life test
| Test temperature, ℃ | Continuous service time Hours, ℃ |
1050 |
≥80 |
* Temperature factor of resistivity
| 20℃ | 100℃ |
200℃ |
300℃ |
400℃ |
500℃ |
600℃ |
700℃ |
800℃ |
900℃ |
1000℃ |
1100℃ |
1200℃ |
1300℃ |
1.00 |
1.04 |
1.10 |
1.14 |
1.17 |
1.21 |
1.23 |
1.26 |
1.28 |
1.30 |
1.32 |
1.34 |
- |
- |
* Feature
This alloy has moderate resistance to oxidation.
* Application
Typical applications for Nichrome 20 are terminals attached to nickel-chromium heating elements, element fasteners and refractory anchor bolts.
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