Alloy B，Brightray B ，,E FORU

British Specs:，American Specs:，German Specs:

### **Technical Datasheet: Alloy B / Brightray® B** **UNS Designation:** N10001 **Common Names:** Brightray B, NiCr80/20, Resistance Heating Alloy --- ### **1. Product Overview** Alloy B (commercially known as Brightray B) is a nickel-chromium alloy specifically developed for high-temperature resistance heating applications. With a nominal composition of 80% nickel and 20% chromium, it offers excellent oxidation resistance, stable electrical resistivity, and long service life in continuous operation up to 1150°C. The alloy is particularly valued for its consistent performance in electric heating elements and industrial thermal processing equipment. --- ### **2. Key Characteristics** - **Excellent Oxidation Resistance**: Forms protective Cr₂O₃ scale at high temperatures - **High Electrical Resistivity**: Suitable for efficient heating element design - **Good High-Temperature Strength**: Maintains structural integrity under thermal cycling - **Long Service Life**: Reliable performance in continuous high-temperature operation - **Formability**: Can be cold worked and formed into various shapes - **Sulfur Resistance**: Moderate resistance to sulfur-containing atmospheres --- ### **3. Chemical Composition (Weight %)** | Element | Content | |---------|---------| | Nickel (Ni) | 78.0–80.0% | | Chromium (Cr) | 19.0–21.0% | | Iron (Fe) | ≤1.0% | | Silicon (Si) | 0.75–1.50% | | Manganese (Mn) | 0.50–1.50% | | Carbon (C) | ≤0.08% | | Copper (Cu) | ≤0.20% | | Other Elements | ≤0.50% total | --- ### **4. Physical Properties** | Property | Value | |----------|-------| | Density | 8.41 g/cm³ | | Melting Point | 1400°C | | Specific Heat (20°C) | 440 J/kg·K | | Thermal Conductivity (20°C) | 12.5 W/m·K | | Mean Coefficient of Thermal Expansion (20–1000°C) | 17.0 × 10⁻⁶/K | | Electrical Resistivity (20°C) | 1.09 μΩ·m | | Curie Temperature | -150°C | --- ### **5. Mechanical Properties** #### **5.1. Room Temperature Properties** | Form | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |------|-----------------------|---------------------|----------------| | Wire (Annealed) | 690–860 | 275–415 | 20–35 | | Strip (Annealed) | 655–825 | 240–380 | 25–40 | #### **5.2. High-Temperature Properties** | Temperature (°C) | Tensile Strength (MPa) | Creep Strength (MPa) | |------------------|-----------------------|----------------------| | 800 | 275–345 | 45 | | 1000 | 115–170 | 15 | | 1100 | 70–110 | 8 | --- ### **6. International Standards** | Standard | Description | |----------|-------------| | **ASTM B163** | Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes | | **ASTM B344** | Drawn or Rolled Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements | | **IEC 60095** | International Standard for Nickel-Chromium alloys with 20% Chromium | | **DIN 17470** | NiCr80/20 (Material No. 2.4869) | | **BS 115** | Resistance Alloys for Electrical Heating | --- ### **7. Product Applications** #### **7.1. Electrical Heating Elements** - **Industrial Furnaces**: Continuous belt furnaces, heat treatment furnaces - **Domestic Appliances**: Toasters, ovens, water heaters, hair dryers - **Industrial Heating**: Process air heaters, radiant tubes, kilns #### **7.2. Thermal Processing Components** - **Heat Treatment Baskets**: For carburizing and neutral hardening - **Radiant Tubes**: In gas-fired and electric furnaces - **Thermocouple Sheaths**: Protection tubes for temperature sensing #### **7.3. Specialized Applications** - **Aerospace Components**: Heating elements for de-icing systems - **Glass Manufacturing**: Heating elements in glass melting equipment - **Ceramic Industry**: Kiln furniture and heating elements --- ### **8. Fabrication & Processing** #### **8.1. Working Characteristics** - **Cold Working**: Excellent – can be drawn, rolled, and formed - **Hot Working**: Performed in 1150–1250°C range - **Annealing**: 1050–1150°C followed by rapid cooling - **Welding**: All conventional methods suitable (TIG, MIG, resistance) #### **8.2. Heat Treatment** - **Stress Relieving**: 750–850°C - **Annealing Temperature**: 1050–1150°C - **Atmosphere**: Hydrogen or vacuum recommended for bright annealing --- ### **9. Operating Limitations** | Condition | Maximum Temperature | Notes | |-----------|---------------------|-------| | Continuous Air Operation | 1150°C | Recommended maximum | | Intermittent Air Operation | 1200°C | Short-term exposure | | Reducing Atmospheres | 1150°C | Requires careful atmosphere control | | Sulfur-Bearing Atmospheres | 800°C | Limited resistance to sulfur | --- ### **10. Quality Assurance** - **Chemical Analysis**: Certified to specified composition limits - **Dimensional Control**: Meets ASTM/ISO dimensional tolerances - **Surface Quality**: Free from defects affecting performance - **Electrical Testing**: Resistivity verified to specification requirements --- ### **11. Comparative Advantages** | Parameter | Advantage over Competitive Materials | |-----------|--------------------------------------| | Oxidation Resistance | Superior to iron-chromium-aluminum alloys at moderate temperatures | | Formability | Better than higher chromium nickel alloys | | Cost-Effectiveness | More economical than precious metal heating elements | | Service Life | Longer life than lower nickel content alloys | --- ### **12. Health & Safety** - **Machining**: Use standard metalworking practices with adequate ventilation - **Welding**: Follow standard nickel alloy welding safety procedures - **Disposal**: Recyclable as nickel-containing scrap --- ### **13. Disclaimer** This technical information is provided for reference purposes only. Actual performance may vary based on manufacturing processes, service conditions, and specific application requirements. Users should conduct application-specific testing to verify suitability. The manufacturer's recommendations for fabrication and operation should always be followed. Compliance with relevant safety standards and regulations is the responsibility of the end user.

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 2820 gallon liquid totes Special package is available on request.