Nichrome 35-20 Medium Temperature Resistor Material, 42Fe-35Ni-20Cr-2Si-1Mn,E FORU

**Product Overview: Nichrome 35-20 Medium Temperature Resistor Material (42Fe-35Ni-20Cr-2Si-1Mn)** Nichrome 35-20 is a medium-temperature resistance heating alloy with a nominal composition of 42% iron, 35% nickel, 20% chromium, 2% silicon, and 1% manganese. This carefully balanced alloy is specifically formulated to deliver reliable performance in medium-temperature heating applications, offering an optimal combination of electrical resistance, oxidation resistance, and cost-effectiveness. --- ### **Key Characteristics & Advantages** - **Medium-Temperature Capability**: Suitable for continuous operation up to 900°C (1652°F) - **Good Oxidation Resistance**: Chromium content provides protection against high-temperature oxidation - **Optimal Electrical Resistivity**: Balanced composition ensures efficient heating performance - **Cost-Effective Solution**: Iron-based composition reduces material costs - **Good Mechanical Strength**: Maintains structural integrity at operating temperatures --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Iron (Fe)** | 40.0–44.0 | Base element providing cost-effective matrix | | **Nickel (Ni)** | 34.0–36.0 | Enhances oxidation resistance and high-temperature strength | | **Chromium (Cr)**| 19.0–21.0 | Provides oxidation resistance through protective oxide layer | | **Silicon (Si)** | 1.5–2.5 | Improves oxidation resistance and scale adhesion | | **Manganese (Mn)**| 0.8–1.2 | Aids in deoxidation and improves hot workability | | **Carbon (C)** | ≤0.08 | Controlled to prevent carbide formation | | **Other Elements**| ≤0.3 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 7.95 g/cm³ | At room temperature | | **Melting Point** | ~1390°C | Approximate | | **Thermal Expansion Coefficient**| 14.0 × 10⁻⁶/°C | 20–800°C range | | **Thermal Conductivity** | 15.2 W/m·K | At 20°C | | **Electrical Resistivity** | 1.05 μΩ·m | At 20°C | | **Specific Heat Capacity** | 460 J/kg·K | At 20°C | --- ### **Electrical & Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Maximum Operating Temperature** | 900°C | Continuous service | | **Temperature Coefficient (TCR)** | 100 ppm/°C | 20–500°C range | | **Tensile Strength** | 650–800 MPa | Annealed condition | | **Yield Strength** | 280–350 MPa | At 0.2% offset | | **Elongation** | 25–35% | In 50 mm | | **Hardness** | 170–220 HV | Annealed condition | --- ### **International Standards & Specifications** Nichrome 35-20 complies with the following international standards: - **ASTM B344**: Standard for Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements - **IEC 60276**: International Standard for Electrical Heating Alloys - **DIN 17470**: German Standard for Nickel-Chromium and Nickel-Chromium-Iron Alloys - **GB/T 1234**: Chinese Standard for High Resistance Alloys for Electrical Heating - **JIS C2520**: Japanese Industrial Standard for Electrical Resistance Alloys --- ### **Applications** 1. **Heating Elements**: - Industrial furnaces and ovens (medium temperature range) - Heat treatment equipment - Food service equipment (ovens, toasters, grills) - Domestic appliances 2. **Industrial Heating**: - Process heating elements - Air heating systems - Drying and curing ovens - Packaging machinery 3. **Electrical Applications**: - Power resistors - Current-limiting devices - Electrical heating components - Temperature control systems 4. **Automotive and Aerospace**: - Cabin heating elements - Defrosting systems - Sensor heating elements - Auxiliary heating devices --- ### **Available Forms** - **Wire**: Various diameters from 0.1 mm to 6.0 mm - **Strip**: Thickness from 0.05 mm to 2.0 mm - **Ribbon**: Custom widths and thicknesses - **Pre-formed Elements**: Custom shapes for specific applications - **Coiled Elements**: Ready-to-install heating coils --- **Disclaimer**: *The information provided is for technical reference purposes. Actual performance may vary depending on manufacturing processes, heat treatment conditions, element design, 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 3105 gallon liquid totes Special package is available on request.