Alloy B,Brightray B Tube,,E FORU

British Specs:，American Specs:，German Specs:

### **Product Data Sheet: Alloy B / Brightray B Resistance Heating Alloy Tubes** **1. Product Overview** Alloy B, commonly known under the trade name **Brightray B**, is a nickel-chromium alloy specifically engineered for high-performance resistance heating applications. It is renowned for its excellent oxidation resistance at high temperatures, good mechanical strength, and long service life. This datasheet provides detailed information on Brightray B tubes, which are widely used in the construction of electric heating elements for industrial furnaces, appliances, and thermal processing systems. The alloy forms a protective, adherent layer of chromium oxide upon heating, which acts as a barrier against further oxidation, making it ideal for continuous use in air. **2. Chemical Composition (Typical % by Weight)** The chemical composition is balanced to optimize high-temperature performance and electrical resistance. | Element | Content (%) | Function | | :--- | :--- | :--- | | Nickel (Ni) | 80 | Base element, provides austenitic structure and stability. | | Chromium (Cr) | 20 | Forms the protective Cr₂O₃ oxide scale for oxidation resistance. | | Iron (Fe) | ≤ 1.0 | Residual impurity. | | Carbon (C) | ≤ 0.15 | Affects strength; controlled to minimize carbide formation. | | Manganese (Mn) | ≤ 1.0 | Aids in deoxidation during melting. | | Silicon (Si) | ≤ 1.0 | Enhances oxidation resistance and scale adherence. | | Copper (Cu) | ≤ 0.5 | Residual impurity. | | Sulfur (S) | ≤ 0.015 | Residual impurity; kept low to prevent hot shortness. | **3. Physical & Mechanical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | 8.41 g/cm³ (0.304 lb/in³) | | **Melting Point** | Approx. 1400°C (2550°F) | | **Specific Heat Capacity** | 440 J/kg·K at 20°C | | **Thermal Conductivity** | 12.5 W/m·K at 20°C | | **Coefficient of Thermal Expansion** | 17.0 μm/m·K (20-1000°C) | | **Electrical Resistivity** | 1.09 μΩ·m at 20°C | | **Tensile Strength** | 655 MPa (min) | | **Yield Strength (0.2% Offset)** | 240 MPa (min) | | **Elongation** | 30% (min) | | **Magnetic Properties** | Essentially non-magnetic (austenitic structure) | **4. Product Applications** Brightray B tubes are primarily used as sheaths for tubular heating elements or as direct heating components in a wide range of applications: * **Industrial Furnaces & Ovens:** As radiant tubes, muffles, and retorts for heat treatment (annealing, carburizing), and ceramic kilns. * **Appliances:** Heating elements in domestic and commercial appliances like ovens, toasters, and coffee makers. * **Heat Exchangers & Components:** In environments requiring corrosion resistance and high-temperature strength. * **Industrial Process Heaters:** Immersion heaters, air heaters, and band heaters. * **Aerospace & Automotive:** Test rigs and component heating systems. **5. Key Features & Benefits** * **Excellent Oxidation Resistance:** Superior performance in continuous service up to **1150°C** in air. * **Long Service Life:** The stable oxide layer ensures reliable performance and durability, reducing downtime and replacement costs. * **High Resistivity:** Allows for the design of compact heating elements with sufficient resistance. * Good Hot Strength: Maintains structural integrity and resists sagging at operating temperatures. * **Good Formability:** Tubes can be bent and formed into complex shapes in the annealed condition. * **Protective Oxide Scale:** The adherent chromia scale spalls less readily than other oxides, protecting the underlying material. **6. International Standards** Brightray B complies with several international material standards, ensuring quality and interchangeability. * **ASTM:** ASTM B163 - Standard Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger Tubes. * **UNS Number:** **N06003** * **IEC:** IEC 60240 (Characteristics of electric heating elements for industrial and laboratory furnaces). * **DIN:** **DIN 17470** (Material No. 2.4869 - NiCr80/20). * **BS:** **BS 972** (Alloy 2 - Ni80/Cr20). * **JIS:** **JIS H 4541** (Alloy NCF 2). **7. Product Form & Availability** * **Form:** Seamless and Welded Tubes. * **Size Range:** Available in a wide range of outside diameters (OD) and wall thicknesses (WT) to meet specific design requirements. Custom sizes can be produced upon request. * **Condition:** Supplied in annealed and pickled condition for optimal formability. **8. Additional Information** For specific design requirements, technical drawings, or custom fabrication needs, please contact our engineering support team. We can provide guidance on element design, maximum operating temperatures, and suitable supporting materials (e.g., refractory, insulators). --- **Disclaimer:** The information provided herein is typical and for reference purposes. Properties can vary based on manufacturing process, heat treatment, and tube size. Users should verify the suitability of the material for their specific application.

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 2824 gallon liquid totes Special package is available on request.