Introduction

DOMADIA Precision Nickel Alloy NiCrAlCuMnSi is a specialized nickel-chromium-based resistance alloy, engineered for exceptional electrical performance in demanding environments such as mobile phone manufacturing, sensor technology, and precision electronics.

Chemical Composition

This alloy is meticulously formulated for uniform resistance and superior performance. The typical chemical composition is:

ElementContent (weight %)
Nickel (Ni)Balance
Chromium (Cr)18 – 22
Aluminum (Al)2 – 4
Copper (Cu)0.5 – 2.0
Manganese (Mn)0.5 – 2.0
Silicon (Si)0.5 – 2.0
Carbon (C)≤ 0.20

Key Properties

  • Electrical resistivity: 133 μΩ·cm at 20°C for stable, precise resistance.
  • Temperature Coefficient of Resistance (TCR): ±10 ppm/°C (very low, offering stable performance across a wide temperature range).
  • Thermal EMF vs. Copper: 1.0 μV/°C.
  • Non-magnetic: Does not interfere with sensitive electronics.
  • Corrosion resistance: Withstands mineral acids, humid environments, and moderate seawater exposure.
  • Mechanical strength: Good tensile properties for thin foil/strip manufacturing.
  • Density: 8.1 g/cm³.
  • Melting Point: 1350°C.
  • Thermal Conductivity: 14.6 W/m·K.

Advantages

  • Ultra-stable resistance: Extremely low TCR ensures accurate readings in electronic devices.
  • Excellent reliability: Corrosion and oxidation resistance extend component life.
  • Non-magnetic: Ideal for environments sensitive to magnetic fields.
  • Mechanical versatility: Can be produced in extremely thin foils and strips.

Applications

Applications of Advanced Materials in Electronics 1
  • Mobile phone manufacturing: Used in resistors, strain gauges, and signal processing components needing predictable resistance.
  • Sensors: Essential for accurate and repeatable measurements.
  • High-precision resistors: Found in laboratory equipment, aerospace, and medical devices.
  • Strain gauges: For industrial and structural monitoring.
  • Other electronics: Precision circuits, control systems, and measuring equipment.

Standards and Specifications

  • UNS (Unified Numbering System): N10276.
  • ASTM / EN / DIN equivalents: Often compared to NiCr20Al2.5Cu2Mn1Si1; EN number 2.4872.
  • Other Names: ISAOHM, NiCr20AlSi
  • Manufacturing Range: Available as strip, foil, or sheet in various thicknesses (down to 0.015 mm) and widths (up to 200 mm).

Conclusion

Evanohm R S0.04 B sets a benchmark for precision resistance alloys. With a tailored chemical balance, ultra-low temperature coefficient, and top-tier stability, it is the alloy of choice for mobile phones and other advanced technologies demanding unwavering electrical performance.

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