Nichrome 70-30 Medium Temperature Resistor Material,68Ni-30Cr-1Mn-1Si,E FORU

**Product Overview: Nichrome 70-30 Medium Temperature Resistor Material (68Ni-30Cr-1Mn-1Si)** Nichrome 70-30 is a premium-grade nickel-chromium resistance heating alloy designed for superior performance in high-temperature applications. With its optimized composition of approximately 68% nickel, 30% chromium, and balanced additions of manganese and silicon, this alloy represents one of the highest performance materials in the Nichrome family, offering exceptional oxidation resistance and long service life in demanding thermal environments. --- ### **Key Characteristics & Advantages** - **Excellent High-Temperature Capability**: Suitable for continuous operation up to 1200°C (2192°F) - **Superior Oxidation Resistance**: High chromium content ensures exceptional protection against oxidation and corrosion - **Optimal Electrical Resistivity**: Ideal balance of resistance and power handling capacity - **Long Service Life**: Maintains performance and integrity under prolonged high-temperature exposure - **Excellent Thermal Stability**: Minimal resistance drift and consistent performance over time --- ### **Chemical Composition (Typical Weight %)** | Element | Content Range (%) | Function Description | |------------------|-------------------|-----------------------| | **Nickel (Ni)** | 67.0-69.0 | Primary element providing high-temperature strength and stability | | **Chromium (Cr)**| 29.0-31.0 | Forms dense protective oxide layer for superior oxidation resistance | | **Manganese (Mn)**| 0.8-1.2 | Enhances workability and acts as deoxidizer | | **Silicon (Si)** | 0.8-1.2 | Improves oxidation resistance and scale adhesion | | **Iron (Fe)** | ≤0.5 | Controlled impurity | | **Carbon (C)** | ≤0.08 | Minimized to prevent carbide formation | | **Other Elements**| ≤0.2 | Controlled impurities | --- ### **Physical Properties** | Property | Typical Value | Test Conditions | |---------------------------------|------------------------|--------------------------| | **Density** | 8.40 g/cm³ | At room temperature | | **Melting Point** | 1400°C | Approximate | | **Thermal Expansion Coefficient**| 13.2 × 10⁻⁶/°C | 20-1000°C range | | **Thermal Conductivity** | 12.8 W/m·K | At 20°C | | **Electrical Resistivity** | 1.18 μΩ·m | At 20°C | | **Specific Heat Capacity** | 430 J/kg·K | At 20°C | --- ### **Electrical & Mechanical Properties** | Property | Typical Value | Test Conditions | |------------------------|----------------------|----------------------------| | **Maximum Continuous Operating Temperature** | 1200°C | Normal service conditions | | **Maximum Peak Temperature** | 1250°C | Short-term operation | | **Temperature Coefficient (TCR)** | 70 ppm/°C | 20-500°C range | | **Tensile Strength** | 720-880 MPa | Annealed condition | | **Yield Strength** | 350-420 MPa | At 0.2% offset | | **Elongation** | 22-32% | In 50 mm | | **Hardness** | 190-240 HV | Annealed condition | --- ### **International Standards & Specifications** Nichrome 70-30 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 - **UNS N06008**: Unified Numbering System designation - **AMS 5546**: Aerospace Material Specification --- ### **Applications** 1. **High-Temperature Industrial Heating**: - Industrial furnaces and kilns - Heat treatment equipment - Ceramic and glass manufacturing - Metal processing furnaces 2. **Specialty Electrical Heating**: - High-temperature laboratory furnaces - Semiconductor processing equipment - Vacuum furnace elements - Research and development equipment 3. **Advanced Consumer Applications**: - High-performance commercial appliances - Professional cooking equipment - Specialty heating tools - Precision temperature control systems 4. **Aerospace and Defense**: - Aircraft heating systems - Missile component heaters - Satellite thermal control - Defense system heaters 5. **Energy and Power Generation**: - Power plant heating systems - Nuclear auxiliary heating - Renewable energy systems - Energy conversion equipment --- ### **Available Forms** - **Wire**: Diameters from 0.05 mm to 12.0 mm - **Strip and Ribbon**: Thickness from 0.03 mm to 6.0 mm - **Custom Pre-formed Elements**: Complex shapes and assemblies - **Welding Wire**: For high-temperature joining applications - **Powder**: For specialized manufacturing processes --- **Disclaimer**: *The information provided is for technical reference purposes only. Actual performance may vary depending on manufacturing processes, heat treatment, element design, operating conditions, and environmental factors. Users should conduct appropriate testing to verify suitability for specific applications and adhere to all relevant safety standards, regulations, and industry best practices. Professional engineering consultation is strongly recommended for critical applications requiring high reliability and extended service life.*

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 3108 gallon liquid totes Special package is available on request.