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NiCr Series
The text describes the properties of a material known as Cr15Ni60. This material is considered to be ideal due to its good ductility, workability, and weldability, especially under high temperatures and seismic strength. Additionally, it is a nickel-chromium alloy that has high and stable resistance, corrosion resistance, and surface oxidation resistance. It also possesses excellent coil-forming ability, making it a versatile material for various applications. Overall, Cr15Ni60 is a highly desirable material due to its combination of mechanical and chemical properties.
The properties of nichrome wire make it an ideal material for use in heating elements. It has the ability to withstand long-term use and cooling down without becoming brittle, which is crucial for its durability. Additionally, it has a high resistance to oxidation, which is a common problem for most metals when heated in air. This is due to the formation of an outer layer of chromium oxide when heated to red-hot temperatures, which is stable in air and protects the wire from further oxidation.
Another advantage of nichrome wire is its good ductility, meaning it can be stretched and bent without breaking. This property remains even after long-term usage, making it a reliable option for heating elements. Furthermore, nichrome wire has excellent weldability, allowing it to be easily joined with other materials. Overall, the unique combination of properties exhibited by nichrome wire make it a highly desirable material for heating elements in various applications. Its durability, resistance to oxidation, ductility, and weldability make it a versatile and reliable choice.
Size dimension range:
Wire: 0.01-10mm
Ribbons: 0.05*0.2-2.0*6.0mm
Strip: 0.05*5.0-5.0*250mm
NiCr series: Cr20Ni80, Cr30Ni70, Cr15Ni60, Cr20Ni35, Cr20Ni30
| 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.
