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Cr20Ni70 Heating Nichrome Wire Strip Ribbon Resistance Wire Coil
NiCr Series
Cr20Ni70 is an exceptional material that offers a range of desirable properties, making it an ideal choice for various applications. It is known for its excellent ductility, workability, and weldability, even under high temperatures and seismic stress. This material is particularly useful in situations where high strength and durability are crucial.
One of the key features of Cr20Ni70 is its high and stable resistance to corrosion. This makes it an excellent choice for applications where the material will be exposed to harsh environments or corrosive substances. Additionally, the material has outstanding surface oxidation resistance, making it suitable for use in high-temperature settings.
Another advantage of Cr20Ni70 is its exceptional coil-forming ability. This property makes it easy to shape and mold the material into various forms and shapes, making it highly versatile and useful in a wide range of applications.
Overall, Cr20Ni70 is a highly desirable material that offers a range of properties that make it an excellent choice for various industrial and commercial applications. Its high strength, durability, and resistance to corrosion and oxidation make it an ideal choice for use in harsh environments, while its excellent coil-forming ability makes it easy to work with and shape to meet specific needs.
| 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 temperature℃ | 1300 | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Meltiing point ℃ | 1400 | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Density g/cm3 | 8.7 | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Resistivity at 20℃((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 | 0.44 | 0.461 | 0.494 | 0.5 | 0.5 | ||
| J/g.℃ | |||||||
| Thermal conductivity | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | ||
| KJ/m.h℃ | |||||||
| Coefficient of lines expansion | 18 | 17 | 17 | 19 | 19 | ||
| a×10-6/ | |||||||
| (20~1000℃) | |||||||
| Micrographic structure | Austenite | Austenite | Austenite | Austenite | Austenite | ||
| Magnetic properties | Non-magnetic | Non-magnetic | Non-magnetic | Weak magnetic | Weak magnetic | ||
| Micrographic structure | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | Ferrite | |
| Magnetic properties | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic | |
| Form | Specification | |
| Wire | Diameter=0.025mm~8mm | |
| Flat wire | Width=0.40~6.0mm | Thick=0.03~0.50mm |
| Strip | width=8~250mm | Thick=0.05~3.0mm |
| Bar | Diameter=8~100mm | Long=50~1000 |
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NiCr 80/20 is suitable for heating elements used for temperatures upto 1200°C. This is used for electrical cooking equipment, precison resistors. Oxidized wires of these alloys display better insulation properties.
NiCr 70/30 is suitable for heating elements used for temperatures upto 1230°C for industrial furnaces which have alternating oxidizing, or reducing atmosphere. This alloy has excellent corrosion resistance and long life in air and controlled atmospheres.
NiCr 60/15 is suitable for heating elements used for temperatures upto 1150°C. This is used for electrically heated equipment, high resistance and potientiometer resistors.
NiCr 30/20 is suitable for heating elements used for temperatures upto 1050°C. Inspite of relatively high Fe content, these alloys are resistant to oxidation and chemical corrosion. They are used for making heating elements of cooking equipment, heating cords and cables.
