Nickel-chromium (NiCr) Wire Grades
Select the right alloy for your heating application
Nickel-chromium (NiCr) resistance alloys are among the most widely used heating materials in industry. Our NiCr wire range offers excellent high-temperature strength, stable resistivity, and superior oxidation resistance. Available in multiple grades to suit different temperature requirements.
Cr20Ni80
Max 1200°C, most versatile alloy — the industry standard for general-purpose heating elements.
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Cr30Ni70
Max 1250°C, higher nickel content — superior oxidation resistance for demanding environments.
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Cr15Ni60
Max 1150°C, cost-effective — balanced performance and economy for mid-range applications.
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Cr20Ni35
Max 1100°C, economical — ideal for lower-temperature heating and cost-sensitive projects.
View DetailsNiCr Alloy Grades — Specification Overview
Key properties of our nickel-chromium resistance wire grades
Alloy Name Properties
|
Cr20Ni80 | Cr30Ni70 | Cr15Ni60 | Cr20Ni35 | Cr20Ni30 | |
|---|---|---|---|---|---|---|
| Main Chemical Components |
Ni | Remainder | Remainder | 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 | Remainder | Remainder | Remainder | |
| Maximum operating temperature | 1200 | 1250 | 1150 | 1100 | 1100 | |
| Resistivity 20ºC (μΩ·m) | 1.09±0.05 | 1.18±0.05 | 1.12±0.05 | 1.04±0.05 | 1.04±0.05 | |
| Density(g/cm3) | 8.40 | 8.10 | 8.20 | 7.90 | 7.90 | |
| Coefficient of heat conductivity (20ºC) (W/m·K) |
15 | 14 | 13 | 13 | 13 | |
| Coefficient of linear expansion (20ºC ~ 1000ºC) (α×10-6/ºC) |
18.0 | 17.0 | 17.0 | 19.0 | 19.0 | |
| Melting point(ºC) | 1400 | 1380 | 1390 | 1390 | 1390 | |
| Tensile strength(Rm/MPa) | ≥650 | ≥650 | ≥600 | ≥600 | ≥600 | |
| Elongation after Fracture (A/%) | ≥20 | ≥20 | ≥20 | ≥20 | ≥20 | |
| Accelerated life test(Hours/ºC) | ≥80/1200 | ≥50/1250 | ≥80/1150 | ≥80/1100 | ≥50/1100 | |
| Microscopic structure | Austenite | Austenite | Austenite | Austenite | Austenite | |
| Magnetism | Non-magnetic | Non-magnetic | Weak magnetic | Non-magnetic | Non-magnetic | |
* Data per GB/T1234-2012. Contact us for detailed datasheets and custom requirements.
Why Choose NiCr Alloys?
Key advantages of nickel-chromium resistance wires
High-Temperature Strength
NiCr alloys retain excellent mechanical strength at elevated temperatures, resisting sagging and deformation even after prolonged service.
Superior Oxidation Resistance
A protective chromium oxide layer forms on the surface, preventing further oxidation and extending element life significantly.
Stable Resistivity
Resistance values remain stable across wide temperature ranges, ensuring consistent heating performance and precise temperature control.
Excellent Formability
NiCr wire is ductile and easy to wind into coils, bend into shapes, and form into complex element designs without cracking.
Long Service Life
Combined high-temperature strength and oxidation resistance result in significantly longer element life compared to alternative materials.
Non-Corrosive
NiCr alloys do not corrode iron-based materials and are compatible with most ceramic insulation materials used in furnace construction.
Applications
Industries and equipment served by NiCr resistance wires
Industrial Furnaces
Heating elements for heat treatment, annealing, sintering, and carburizing furnaces in steel, ceramics, and glass industries.
Household Appliances
Heating elements for toasters, ovens, hair dryers, irons, space heaters, and other domestic heating appliances.
Laboratory Equipment
Precision heating elements for lab furnaces, kilns, analytical instruments, and sample preparation equipment.
Plastics & Packaging
Hot runner heaters, heat sealing elements, and extruder barrel heaters for plastics processing and packaging machinery.