5200 Nickel Iron Resistance Wire,70Ni30Fe Alloy,ASTM B267,E FORU

### **Product Introduction: 5200 Nickel Iron Resistance Wire (70Ni30Fe Alloy)** **5200 Nickel Iron Resistance Wire** is a high-performance nickel-iron resistance alloy manufactured in accordance with ASTM B267 specifications, composed of approximately 70% nickel and 30% iron. This precision resistance alloy is specifically engineered to provide excellent electrical resistance characteristics combined with superior thermal stability and mechanical properties, making it ideal for a wide range of electrical heating and resistance applications. The alloy's carefully balanced composition ensures consistent performance in various operating conditions, offering reliable resistance stability, good oxidation resistance, and excellent fabricability for manufacturing precision electrical components. --- #### **1. Chemical Composition (Weight %)** The chemical composition of 5200 Nickel Iron Resistance Wire per ASTM B267 is as follows: | Element | Content (%) | Element | Content (%) | |---------|-------------|---------|-------------| | **Nickel (Ni)** | 68.0 - 72.0 | **Iron (Fe)** | Balance | | **Manganese (Mn)** | 0.50 - 1.50 | **Silicon (Si)** | 0.50 - 1.50 | | **Carbon (C)** | 0.05 - 0.15 | **Chromium (Cr)** | 0.50 max | | **Copper (Cu)** | 0.25 max | **Aluminum (Al)** | 0.50 max | | **Sulfur (S)** | 0.015 max | **Phosphorus (P)** | 0.02 max | | **Other Elements** | 0.50 max | | | --- #### **2. Physical & Mechanical Properties** **Physical Properties:** | Property | Metric Units | Imperial Units | |----------|-----------------|------| | **Density** | 8.45 g/cm³ | 0.305 lb/in³ | | **Melting Point** | 1425 °C | 2597 °F | | **Maximum Operating Temperature** | 600 °C | 1112 °F | | **Thermal Conductivity** | 19.0 W/m·K | 132 Btu·in/hr·ft²·°F | | **Coefficient of Thermal Expansion** | 14.0 μm/m·°C | 7.8 μin/in·°F | | **Specific Heat** | 500 J/kg·K | 0.119 Btu/lb·°F | | **Curie Temperature** | 360 °C | 680 °F | **Electrical & Mechanical Properties:** | Property | Value | |----------|-----------------| | **Electrical Resistivity** | 0.35 μΩ·m | 210 Ω·cir mil/ft | | **Temperature Coefficient of Resistance** | 0.0012 °C⁻¹ | | **Tensile Strength** | 550-750 MPa | 80-109 ksi | | **Yield Strength (0.2% Offset)** | 250-450 MPa | 36-65 ksi | | **Elongation** | 20-35% | | **Hardness (Rockwell B)** | 75-95 HRB | | **Modulus of Elasticity** | 160 GPa | 23.2 x 10⁶ psi | --- #### **3. Key Characteristics & Product Applications** **Key Characteristics:** - **Controlled Electrical Resistivity**: Consistent and predictable resistance characteristics - **Excellent Thermal Stability**: Minimal resistance drift under thermal cycling conditions - **Good Oxidation Resistance**: Suitable for continuous operation in air up to 600°C - **Superior Fabricability**: Excellent formability and winding characteristics - **Magnetic Properties**: Ferromagnetic below Curie temperature - **Cost-Effective Performance**: Optimal balance of performance and cost **Product Applications:** 5200 Nickel Iron Resistance Wire serves critical functions in various electrical and thermal applications: - **Industrial Heating Systems**: - Industrial furnace heating elements - Heat treatment oven components - Process heating equipment - Industrial drying systems - **Consumer Appliances**: - Electric stove and range elements - Toaster and toaster oven wires - Space heater components - Household heating appliances - **Electrical Components**: - Precision wire-wound resistors - Power resistors and rheostats - Current-limiting devices - Electrical ballasts - **Specialized Applications**: - Automotive electrical systems - Laboratory heating equipment - Temperature control devices - Electrical instrumentation --- #### **4. International Standards & Specifications** 5200 Nickel Iron Resistance Wire complies with the following international standards: **Primary Specifications:** - **ASTM B267**: Standard Specification for Wire for Use in Wire-Wound Resistors **International Equivalents:** - **UNS**: N02770 - **IEC 60115**: Fixed resistors for use in electronic equipment - **DIN 17471**: Resistance alloys for electrical purposes - **JIS C 2520**: Resistance alloys for electrical heating - **BS 115**: Specification for resistance alloys - **ISO 20233**: Resistance welding equipment --- #### **Summary of Key Advantages** - **Reliable Electrical Performance**: Stable resistance characteristics across operating temperatures - **Excellent Thermal Capability**: Suitable for continuous operation up to 600°C - **Superior Mechanical Properties**: Good strength and ductility for manufacturing flexibility - **Cost-Effective Solution**: Optimal performance at competitive cost - **Proven Reliability**: Established track record in demanding applications - **Comprehensive Standardization**: Meets international quality and performance standards **Technical Note**: 5200 Nickel Iron Resistance Wire develops a protective oxide scale during initial heating cycles, which provides long-term oxidation protection during operation. The alloy's electrical resistivity increases with temperature, requiring appropriate circuit design considerations to maintain consistent power output. For heating element applications, proper support and mounting are essential to prevent sagging and maintain element geometry at operating temperatures. The material exhibits good weldability using resistance welding techniques. Storage conditions should prevent moisture absorption and surface contamination that could affect electrical performance and element life. Proper annealing treatments may be required after severe cold working operations to restore optimal electrical properties and ensure consistent performance in final applications.

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 3173 gallon liquid totes Special package is available on request.