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Factory Nichrome Alloy Strip of Ni80Cr20 Ni70Cr30 Ni60Cr15 Ni35Cr20 Used in Household Appliances
Factory Nichrome Alloy Strip of Ni80Cr20 Ni70Cr30 Ni60Cr15 Ni35Cr20 Used in Household Appliances
Ni70Cr30 is an austenitic nickel-chromium alloy suitable for temperature applications up to 1250°C. High chromium content (30% in average) provides very good life time, especially in the furnace applications. Ni70Cr30 is characterized by high resistivity, good oxidation resistance, good ductility after use and excellent weldability.
Ni70Cr30 is used for electric heating elements in industrial furnaces. Typical applications are: electric and enamelling furnaces, storage heaters, furnaces and kilns with a changing atmospheres.
Typical Mechanical properties(1.0mm)
- Elongation: 30%
- Yield Strength: 420Mpa
- Tensile Strength: 810Mpa
Nichrome strip
|
Performance\ material
|
Cr10Ni90
|
Cr20Ni80
|
Cr30Ni70
|
Cr15Ni60
|
Cr20Ni35
|
Cr20Ni30
|
|
|
Composition
|
Ni
|
90
|
Rest
|
Rest
|
55.0~61.0
|
34.0~37.0
|
30.0~34.0
|
|
Cr
|
10
|
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
|
Rest
|
Rest
|
Rest
|
||
|
Maximum temperatureºC
|
1300
|
1200
|
1250
|
1150
|
1100
|
1100
|
|
|
Meltiing point ºC
|
1400
|
1400
|
1380
|
1390
|
1390
|
1390
|
|
|
Density g/cm3
|
8.7
|
8.4
|
8.1
|
8.2
|
7.9
|
7.9
|
|
|
Resistivity at 20ºC((μΩ·m)
|
1.09±0.05
|
1.18±0.05
|
1.12±0.05
|
1.00±0.05
|
1.04±0.05
|
||
|
Elongation at rupture
|
≥20
|
≥20
|
≥20
|
≥20
|
≥20
|
≥20
|
|
|
Specific heat
J/g.ºC
|
0.44
|
0.461
|
0.494
|
0.5
|
0.5
|
||
|
Thermal conductivity
KJ/m.hºC
|
60.3
|
45.2
|
45.2
|
43.8
|
43.8
|
||
|
Coefficient of lines expansion
a×10-6/
(20~1000ºC)
|
18
|
17
|
17
|
19
|
19
|
||
|
Micrographic structure
|
Austenite
|
Austenite
|
Austenite
|
Austenite
|
Austenite
|
||
|
Magnetic properties
|
Non-magnetic
|
Non-magnetic
|
Non-magnetic
|
Weak magnetic
|
Weak magnetic
|
||
| Resistance Wires | ||
| RW30 | W.Nr 1.4864 | Nickel 37%, Chrome 18%, Iron 45% |
| RW41 | UNS N07041 | Nickel 50%, Chrome 19%, Cobalt 11%, Molybdenum 10%, Titanium 3% |
| RW45 | W.Nr 2.0842 | Nickel 45%, Copper 55% |
| RW60 | W.Nr 2.4867 | Nickel 60%, Chrome 16%, Iron 24% |
| RW60 | UNS NO6004 | Nickel 60%, Chrome 16%, Iron 24% |
| RW80 | W.Nr 2.4869 | Nickel 80%, Chrome 20% |
| RW80 | UNS NO6003 | Nickel 80%, Chrome 20% |
| RW125 | W.Nr 1.4725 | Iron BAL, Chrome 19%, Aluminium 3% |
| RW145 | W.Nr 1.4767 | Iron BAL, Chrome 20%, Aluminium 5% |
| RW155 | Iron BAL, Chrome 27%, Aluminium 7%, Molybdenum 2% | |
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