Resistalloy 8020 Nickel Chromium Electrical Resistance Alloy，1

### **Product Introduction: Resistalloy 8020 Nickel Chromium Electrical Resistance Alloy** **Overview** Resistalloy 8020 is a premium nickel-chromium electrical resistance alloy specifically engineered for high-temperature heating applications. This alloy, following the standard 80% nickel - 20% chromium composition, offers exceptional resistance stability, excellent oxidation resistance, and prolonged service life at temperatures up to 1200°C (2192°F). Its balanced chemical composition and reliable performance make it an ideal choice for heating elements in industrial furnaces, household appliances, and various thermal processing equipment where consistent thermal performance and durability are paramount. --- #### **Chemical Composition (Typical % by Weight)** | Element | Content (%) | Role & Benefit | |---------|-------------|---------------| | **Nickel (Ni)** | 78.0 - 80.0 | Primary matrix element providing base resistivity and high-temperature stability | | **Chromium (Cr)** | 19.0 - 21.0 | Forms protective chromium oxide scale for oxidation resistance | | **Iron (Fe)** | ≤ 1.0 | Controlled residual element | | **Silicon (Si)** | 0.75 - 1.50 | Enhances oxidation resistance and improves scale adhesion | | **Manganese (Mn)** | 0.50 - 1.50 | Improves hot workability and manufacturability | | **Carbon (C)** | ≤ 0.08 | Optimized for high-temperature performance | | **Aluminum (Al)** | ≤ 0.50 | Contributes to oxidation resistance | | **Copper (Cu)** | ≤ 0.50 | Residual element control | | **Sulfur (S)** | ≤ 0.007 | Minimized to prevent hot shortness | | **Other Elements** | ≤ 0.50 | Controlled impurities | --- #### **Physical & Mechanical Properties** **Physical Properties:** - Density: 8.40 g/cm³ (0.303 lb/in³) - Melting Range: 1400-1420°C (2552-2588°F) - Thermal Expansion Coefficient: 13.5 μm/m·°C @ 20-1000°C - Thermal Conductivity: 15.0 W/m·K @ 20°C - Specific Heat Capacity: 460 J/kg·K @ 20°C - Electrical Resistivity: 1.09 μΩ·m at 20°C - Temperature Coefficient of Resistance: 0.0001/°C **Mechanical Properties (Annealed Condition):** - Tensile Strength: 780-950 MPa (113-138 ksi) - Yield Strength (0.2% Offset): 450-620 MPa (65-90 ksi) - Elongation: 20-35% - Hardness: HV 180-220 - Modulus of Elasticity: 210 GPa (30.5 × 10⁶ psi) **High-Temperature Characteristics:** - Maximum Operating Temperature: 1200°C (2192°F) - Excellent resistance to cyclic heating and cooling - Stable electrical resistance over prolonged service life - Minimal resistance drift at operating temperatures - Good sag resistance and structural stability --- #### **International Standards and Specifications** - **ASTM B344:** Standard Specification for Drawn or Rolled Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements - **IEC 60240:** Dimensions and technical requirements for electric heating elements - **DIN 17470:** Electrical resistance alloys - Technical delivery conditions - **EN 10095:** Heat resisting steels and nickel alloys - **JIS C2520:** Nickel-chromium and nickel-chromium-iron alloys for electrical heating - **GB/T 1234:** High resistance alloys - **UL 1030:** Heating, Cooling, and Fan-Grid Heating Elements Standard --- #### **Product Applications** **Industrial Heating Applications:** - Industrial furnace heating elements - Heat treatment furnace components - Ceramic kiln heating systems - Glass manufacturing and processing equipment - High-temperature laboratory and research furnaces - Aluminum melting and holding furnaces **Consumer and Commercial Appliances:** - Electric oven and range heating elements - Toaster and grilling appliance elements - Hair dryer and beauty care heating components - Water heater and immersion heater elements - Industrial and domestic space heating appliances - Commercial food service equipment **Specialized Electrical Applications:** - Aerospace heating components - Automotive glow plugs and heating elements - Temperature sensors and control elements - Electrical resistors and rheostats - High-temperature ignition systems - Process heating and temperature control systems --- #### **Key Advantages** 1. **Excellent Oxidation Resistance**: Superior performance in air at temperatures up to 1200°C with minimal scaling 2. **Stable Electrical Resistance**: Minimal resistance drift during prolonged service life ensures consistent performance 3. **High-Temperature Strength**: Maintains mechanical integrity and structural stability at elevated temperatures 4. **Excellent Thermal Cycling Resistance**: Withstands repeated heating and cooling cycles without degradation 5. **Rapid Thermal Response**: Efficient heat-up and cool-down characteristics for energy-efficient operation 6. **Long Service Life**: Proven durability and extended operational lifespan in demanding applications 7. **Excellent Formability**: Can be readily coiled, bent, and formed into complex heating element shapes 8. **Consistent Quality**: Reliable performance across varied environmental and operational conditions --- **Conclusion** Resistalloy 8020 represents a high-performance nickel-chromium electrical resistance heating alloy that delivers exceptional reliability, longevity, and consistent performance in high-temperature electrical heating applications. Its optimized chemical composition, featuring the classic 80/20 nickel-chromium ratio, ensures stable electrical characteristics, excellent oxidation resistance, and prolonged service life, making it the material of choice for demanding heating elements across industrial, commercial, and consumer applications. Supported by comprehensive international standards and rigorous quality control measures, Resistalloy 8020 continues to set the benchmark for performance and reliability in electrical resistance heating technology. The alloy's proven track record in diverse heating applications, combined with its excellent fabricability and consistent quality, makes it an indispensable material for engineers and designers seeking optimal thermal solutions that prioritize efficiency, durability, and long-term operational reliability.

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 3436 gallon liquid totes Special package is available on request.