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Nickel-Chromium Stranded Resistance Heating Wire
Heat treatment processes often require consistent and accurate performance from resistance wires. To meet these demands, OHMALLOY closely collaborated with cable manufacturers to develop high-quality stranded resistance wires, including FeCrAl, NiCr, NiMn, and pure nickel varieties. These wires are designed to deliver stable electrical resistance and exceptional durability in challenging thermal conditions.
Nickel-chromium wire is known for its high resistivity, excellent oxidation resistance, and ability to withstand elevated temperatures. It also maintains good mechanical strength and weldability, making it suitable for various industrial heating applications.
Specifications| Property | NiCr 80/20 | NiCr 70/30 | NiCr 60/15 | NiCr 35/20 | NiCr 30/20 | |
| Main chemical composition (%) | Ni | Bal. | Bal. | 55.0-61.0 | 34.0-37.0 | 30.0-34.0 |
| Cr | 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 | Bal. | Bal. | Bal. | |
| Max continuous service temperature (℃) | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Resistivity at 20℃ (Ω·mm²/m) | 1.09 | 1.18 | 1.12 | 1.04 | 1.04 | |
| Density (g/cm3) | 8.4 | 8.1 | 8.2 | 7.9 | 7.9 | |
| Thermal conductivity (kJ/(m·h·℃)) | 60.3 | 45.2 | 45.2 | 43.8 | 43.8 | |
| Coefficient of linear expansion (α×10-6/℃) | 18 | 17 | 17 | 19 | 19 | |
| Melting point (℃) | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Elongation (%) | >20 | >20 | >20 | >20 | >20 | |
| Microstructure | Austenite | Austenite | Austenite | Austenite | Austenite | |
| Magnetic properties | Non-magnetic | Non-magnetic | Non-magnetic | Slightly magnetic | Slightly magnetic | |
Stranded resistance heating wire is suitable for use in ceramic pad heater components, such as:
- Heating Wire
- Ceramic Bead
- Male&female connector
OHMALLOY Material Co.,Ltd.
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