Cr20Ni35 Nickel-Chromium Resistance Wire
Also Known As: Chromel D, Nikrothal 40, N4, Chromax, HAI-NiCr 40, Tophet D, Resistohm 40, Cronifer III, 35-20 Ni-Cr, Alloy D, Nikrothal 4, MWS-610, Stablohm 610
Max. 1100°C| Chemical Composition (%) | ||
|---|---|---|
| Element | Cr20Ni35 | Cr20Ni30 |
| C | ≤0.08 | ≤0.08 |
| P | ≤0.02 | ≤0.02 |
| S | ≤0.015 | ≤0.015 |
| Mn | ≤1.0 | ≤1.0 |
| Si | 1.0~3.0 | 1.0~3.0 |
| Cr | 18.0~21.0 | 18.0~21.0 |
| Ni | 34.0~37.0 | 30.0~34.0 |
| Al | - | - |
| Fe | Remainder | Remainder |
| Physical Properties | ||
| Max. Operating Temp. | 1100°C | |
| Resistivity at 20°C (μΩ·m) | 1.04±0.05 | |
| Density | 7.90 g/cm³ | |
| Thermal Conductivity (20°C) | 13 W/(m·K) | |
| Linear Expansion Coeff. (20–1000°C) | 19.0×10-6/K | |
| Specific Heat Capacity | 0.50 J/(g·K) | |
| Approx. Melting Point | 1390°C | |
| Elongation (A/%) | ≤3.0mm: ≥20%; >3.0mm: ≥25% | |
| Tensile Strength (Rm) | ≥600 MPa | |
| Accelerated Life Test | ≥80h/1100°C | |
| Microstructure | Austenite | |
| Magnetic Properties | Non-magnetic | |
| Available Forms | ||
| Form | Size | |
| Bright & Soft Annealed Wire | 0.025–1.6mm | |
| Acid-Pickled Wire | 1.0–12.0mm | |
| Rods | 6.0–150.0mm | |
| Flat Wires | Width 0.2–6.0mm, Thickness 0.08–1.0mm | |
| Strips | Width 5.0–300mm, Thickness 0.05–4.0mm | |
Product Overview
Cr20Ni35 (Lower nickel grade is Cr20Ni30) is an economical nickel-chromium resistance alloy with reduced nickel content. It offers reliable performance for lower-temperature heating applications where the full capability of Cr20Ni80 is not needed. The lower nickel proportion makes it a cost-effective choice for high-volume production environments, while still maintaining good workability and adequate oxidation resistance for many industrial heating tasks.
Key Advantages
- Most economical grade in the NiCr wire family
- Adequate oxidation resistance for moderate-temperature use
- Good ductility and ease of fabrication
- Suitable for high-volume, cost-sensitive applications
Typical Applications
- Low-temperature industrial heating elements
- Electric warming and holding equipment
- Residential heating system components
- Light-duty drying and curing ovens
- General-purpose resistance wire applications
Standards & Compliance
GB/T 1234-2012
High Resistance Alloys
DIN 17471
Resistance Heating Alloys (German Standard)
ASTM B344
Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements (US Standard)
ASTM B603
Iron-Chromium-Aluminum Alloys for Electrical Heating Elements (US Standard)
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