RW 80 Ni-Cr Resistance Wire,,E FORU

### **Product Introduction: RW 80 Ni-Cr Resistance Wire** **RW 80 Ni-Cr Resistance Wire** is a high-performance nickel-chromium alloy specifically engineered for electrical heating applications. This precision resistance wire offers an optimal combination of high electrical resistivity, excellent oxidation resistance, and superior high-temperature strength. The alloy's stable microstructure and controlled composition ensure consistent performance and long service life in various heating elements and electrical resistance applications. With its balanced nickel-chromium composition, RW 80 maintains excellent surface stability and resistance to oxidation up to 1150°C (2100°F), making it suitable for continuous operation in high-temperature environments while providing reliable electrical characteristics and mechanical durability. --- #### **1. Chemical Composition (Weight %)** The typical chemical composition of RW 80 Ni-Cr Resistance Wire is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 75.0 - 78.0 | **Iron (Fe)** | 0.5 - 1.5 | | **Chromium (Cr)** | 19.0 - 21.0 | **Manganese (Mn)** | 0.5 - 1.5 | | **Silicon (Si)** | 0.5 - 1.5 | **Carbon (C)** | 0.05 - 0.12 | | **Aluminum (Al)** | 0.2 - 0.6 | **Copper (Cu)** | 0.25 max | | **Sulfur (S)** | 0.01 max | **Phosphorus (P)** | 0.02 max | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.40 g/cm³ | 0.303 lb/in³ | | **Melting Point** | 1400 °C | 2552 °F | | **Maximum Operating Temperature** | 1150 °C | 2102 °F | | **Thermal Conductivity** | 15.0 W/m·K | 104.0 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 13.5 μm/m·°C | 7.5 μin/in·°F | | **Specific Heat** | 460 J/kg·K | 0.110 Btu/lb·°F | **Electrical & Mechanical Properties:** | Property | Value | |----------|-----------------| | **Electrical Resistivity** | 1.09 μΩ·m | 650 Ω·cir mil/ft | | **Temperature Coefficient of Resistance (20-100°C)** | 0.00013 °C⁻¹ | | **Tensile Strength** | 780-880 MPa | 113-128 ksi | | **Elongation** | 20-30% | | **Hardness (Rockwell B)** | 85-95 HRB | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **High Electrical Resistivity**: Provides efficient heat generation with optimal power consumption - **Excellent Oxidation Resistance**: Forms protective chromium oxide scale for long service life - **Good High-Temperature Strength**: Maintains structural integrity at elevated temperatures - **Thermal Stability**: Minimal resistance drift during thermal cycling - **Good Formability**: Can be wound and shaped into complex heating elements - **Long Service Life**: Reliable performance under continuous high-temperature operation **Product Applications:** RW 80 Ni-Cr Resistance Wire is widely used in various heating applications: - **Industrial Heating Elements**: - Industrial furnaces and ovens - Heat treatment equipment - Ceramic kilns and glass melting furnaces - High-temperature processing equipment - **Consumer Appliances**: - Electric stoves and ovens - Toasters and toaster ovens - Hair dryers and styling tools - Space heaters and warming appliances - **Electrical Applications**: - Power resistors and rheostats - Current-limiting devices - Precision resistance components - Temperature sensing elements - **Specialized Applications**: - Laboratory heating equipment - Medical sterilization devices - Aerospace heating systems - Automotive glow plugs --- #### **4. International Standards & Specifications** RW 80 Ni-Cr Resistance Wire complies with major international standards: **International Standards:** - **IEC 60092**: Electrical installations in ships - **ASTM B344**: Nickel-Chromium-Iron Alloy Rod and Bar - **DIN 17470**: Resistance alloys for electrical heating - **JIS C 2520**: Resistance alloys for electrical purposes **Regional Standards:** - **EN 10095**: Heating elements and resistance materials - **BS 115**: Resistance alloys specification - **NF A54**: French standards for resistance alloys **Industry Specifications:** - **MIL-W-6731**: Military specification for resistance wire - **UL 758**: Appliance wiring material - **CSA C22.2**: Canadian electrical standards --- #### **Summary of Key Advantages** - **Optimized Performance**: Balanced composition for reliable high-temperature operation - **Energy Efficiency**: High resistivity enables compact heating element design - **Long Service Life**: Excellent oxidation resistance extends operational lifetime - **Thermal Reliability**: Stable electrical characteristics under thermal cycling - **Manufacturing Flexibility**: Good formability for complex heating element designs - **Industry Compliance**: Meets international standards for quality and safety **Technical Note**: RW 80 Ni-Cr Resistance Wire develops a protective adherent oxide scale during initial heating, which provides long-term oxidation protection. The wire should be properly supported in heating elements to avoid sagging at high temperatures. For optimum performance, heating elements should be designed to operate below the maximum recommended temperature of 1150°C. The alloy's electrical resistivity increases with temperature, requiring proper circuit design to maintain consistent power output. Storage conditions should prevent moisture absorption and surface contamination that could affect performance.

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 3162 gallon liquid totes Special package is available on request.