70 Nickel-Iron Resistor Alloy,Nickel Iron Alloy,70Ni30Fe Alloy,E FORU

**Product Overview: 70 Nickel-Iron Resistor Alloy (70Ni30Fe Alloy)** 70 Nickel-Iron Resistor Alloy, also known as 70Ni30Fe Alloy, is a precision electrical resistance material with a composition of approximately 70% nickel and 30% iron. This alloy is specifically engineered for applications requiring stable electrical resistance characteristics, moderate resistivity, and reliable performance in various environmental conditions. It serves as an important material in electronic components where controlled electrical properties are essential. --- ### **Key Characteristics & Advantages** - **Controlled Electrical Properties**: Stable resistivity with well-managed temperature coefficient - **Good Corrosion Resistance**: Suitable for various operating environments - **Excellent Mechanical Workability**: Can be fabricated into various forms including fine wires - **Predictable Performance**: Consistent electrical characteristics across production batches - **Moderate Cost**: Cost-effective solution for many resistor applications --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | 68.0–72.0 | Primary element defining electrical and magnetic properties | | **Iron (Fe)** | Balance | Base element providing structural stability | | **Manganese (Mn)**| 0.5–1.5 | Deoxidizer and improves workability | | **Silicon (Si)** | 0.1–0.5 | Enhances oxidation resistance | | **Carbon (C)** | ≤0.05 | Controlled to minimize adverse effects on electrical properties | | **Other Elements**| ≤0.3 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.55 g/cm³ | At room temperature | | **Melting Point** | ~1425°C | Approximate | | **Thermal Expansion Coefficient**| 11.5 × 10⁻⁶/°C | 20–300°C range | | **Thermal Conductivity** | 17.5 W/m·K | At 20°C | | **Electrical Resistivity** | 0.20 μΩ·m | At 20°C | | **Curie Temperature** | ~360°C | Magnetic transition point | --- ### **Electrical & Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Temperature Coefficient (TCR)** | ±50 ppm/°C | 20–100°C range | | **Thermal EMF vs Copper** | <3 μV/°C | 0–100°C range | | **Tensile Strength** | 580–750 MPa | Annealed condition | | **Yield Strength** | 240–320 MPa | At 0.2% offset | | **Elongation** | 20–30% | In 50 mm | | **Hardness** | 160–200 HV | Annealed condition | --- ### **International Standards & Specifications** 70Ni30Fe Alloy complies with the following international standards: - **ASTM F167**: Standard Specification for Nickel-Iron Resistance Alloys - **IEC 60195**: Method of measurement of current noise generated in fixed resistors - **MIL-P-47173**: Military Specification for Precision Resistance Alloys - **DIN 17471**: German Standard for Resistance Alloys - **GB/T 1235**: Chinese Standard for Precision Resistance Alloys --- ### **Applications** 1. **Electronic Components**: - Precision wire-wound resistors - Current sensing resistors - Instrumentation resistors - Power resistors 2. **Electrical Instruments**: - Shunt resistors for current measurement - Voltage divider networks - Electrical test equipment - Calibration devices 3. **Automotive Electronics**: - Current sensors in motor control systems - Battery management systems - Power distribution modules - Sensor applications 4. **Industrial Applications**: - Motor control resistors - Power electronics - Industrial measurement systems - Control system components --- ### **Available Forms** - **Resistance Wire**: Various diameters from 0.05 mm to 2.0 mm - **Strip & Foil**: Thickness from 0.05 mm to 1.0 mm - **Ribbon**: Custom widths for specific applications - **Pre-formed Elements**: Custom shapes for specialized applications --- **Disclaimer**: *The information provided is for technical reference purposes. Actual performance may vary depending on manufacturing processes, heat treatment conditions, and specific application requirements. Users should verify suitability through appropriate testing and adhere to relevant industry standards and safety guidelines. Consultation with materials engineers is recommended for critical applications.*

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3104 gallon liquid totes Special package is available on request.