Nichrome 40-20 Medium Temperature Resistor Material,40Ni-38Fe-20Cr-1Mn-1Si,E FORU

**Product Overview: Nichrome 40-20 Medium Temperature Resistor Material (40Ni-38Fe-20Cr-1Mn-1Si)** Nichrome 40-20 is a cost-effective nickel-chromium-iron resistance heating alloy designed for medium-temperature applications. With its balanced composition of 40% nickel, 38% iron, 20% chromium, and controlled additions of manganese and silicon, this alloy offers an excellent combination of electrical resistance properties, oxidation resistance, and economic efficiency for various heating element applications. --- ### **Key Characteristics & Advantages** - **Economic Efficiency**: Higher iron content reduces material costs while maintaining performance - **Good Oxidation Resistance**: Chromium content provides adequate protection up to medium temperatures - **Optimal Resistivity**: Well-balanced electrical characteristics for heating applications - **Good Formability**: Easily fabricated into various shapes and forms - **Reliable Performance**: Consistent operation in medium-temperature ranges --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | 39.0–41.0 | Provides oxidation resistance and high-temperature strength | | **Iron (Fe)** | 37.0–39.0 | Cost-effective base element | | **Chromium (Cr)**| 19.0–21.0 | Forms protective oxide layer for oxidation resistance | | **Manganese (Mn)**| 0.8–1.2 | Improves hot workability and acts as deoxidizer | | **Silicon (Si)** | 0.8–1.2 | Enhances oxidation resistance and scale adhesion | | **Carbon (C)** | ≤0.08 | Controlled to minimize carbide formation | | **Other Elements**| ≤0.3 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.00 g/cm³ | At room temperature | | **Melting Point** | ~1380°C | Approximate | | **Thermal Expansion Coefficient**| 14.2 × 10⁻⁶/°C | 20–800°C range | | **Thermal Conductivity** | 14.8 W/m·K | At 20°C | | **Electrical Resistivity** | 1.02 μΩ·m | At 20°C | | **Specific Heat Capacity** | 450 J/kg·K | At 20°C | --- ### **Electrical & Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Maximum Operating Temperature** | 950°C | Continuous service | | **Temperature Coefficient (TCR)** | 110 ppm/°C | 20–500°C range | | **Tensile Strength** | 620–780 MPa | Annealed condition | | **Yield Strength** | 270–340 MPa | At 0.2% offset | | **Elongation** | 28–38% | In 50 mm | | **Hardness** | 165–215 HV | Annealed condition | --- ### **International Standards & Specifications** Nichrome 40-20 complies with the following international standards: - **ASTM B344**: Standard Specification 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 heat treatment equipment - Commercial cooking appliances - Domestic heating devices - Drying and curing ovens 2. **Electrical Heating Systems**: - Air heating elements - Process heating components - Temperature control systems - Industrial heaters 3. **Consumer Appliances**: - Toasters and toaster ovens - Electric ranges and ovens - Hair dryers and styling tools - Space heaters 4. **Industrial Equipment**: - Packaging machinery heaters - Plastic processing equipment - Laboratory ovens and furnaces - Semiconductor processing equipment --- ### **Available Forms** - **Wire**: Diameters from 0.1 mm to 8.0 mm - **Strip**: Thickness from 0.05 mm to 3.0 mm - **Ribbon**: Various widths and cross-sections - **Pre-formed Elements**: Custom shapes and coils - **Welding Wire**: For joining and repair applications --- **Disclaimer**: *The information provided is for technical reference purposes. Actual performance may vary depending on manufacturing processes, heat treatment, element design, and operating conditions. Users should conduct appropriate testing to verify suitability for specific applications and adhere to all relevant safety standards and regulations. Professional engineering consultation 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 3106 gallon liquid totes Special package is available on request.