Permalloy, Strip,,E FORU

British Specs:，American Specs:MIL-N-14411 C ASTM A753，German Specs:

### **Permalloy - Strip Product Overview** **Permalloy** is a nickel-iron soft magnetic alloy renowned for its extremely high magnetic permeability and low coercivity. The **Strip** form provides precision thin, narrow material with exact dimensional control for high-volume manufacturing of components requiring superior soft magnetic characteristics. * **Common Names:** Permalloy Strip, High Permeability Nickel-Iron Alloy Strip * **Key Variants:** Permalloy 45 Strip, Permalloy 80 Strip --- #### **1. Chemical Composition** | Element | Permalloy 45 (%) | Permalloy 80 (%) | |---------|------------------|------------------| | **Nickel (Ni)** | 45-50 | 77-83 | | **Iron (Fe)** | Balance | Balance | | **Molybdenum (Mo)** | - | 0.5-2.0 | | **Copper (Cu)** | - | 3-5 | | **Manganese (Mn)** | 0.30-0.60 | 0.30-0.60 | | **Silicon (Si)** | 0.10-0.30 | 0.10-0.30 | | **Carbon (C)** | 0.02 max | 0.02 max | --- #### **2. Physical Properties** | Property | Permalloy 45 | Permalloy 80 | |----------|--------------|--------------| | **Density (g/cm³)** | 8.17 | 8.74 | | **Melting Point (°C)** | 1420 | 1450 | | **Curie Temperature (°C)** | 440 | 460 | | **Electrical Resistivity (μΩ·m)** | 0.45 | 0.55 | | **Thermal Conductivity (W/m·K)** | 18 | 16 | | **Thermal Expansion (μm/m·°C)** | 12.0 | 12.5 | --- #### **3. Magnetic Properties** | Property | Permalloy 45 | Permalloy 80 | |----------|--------------|--------------| | **Initial Permeability (μi)** | 2,500-4,000 | 20,000-50,000 | | **Maximum Permeability (μmax)** | 25,000-50,000 | 70,000-150,000 | | **Saturation Induction (T)** | 1.5-1.6 | 0.70-0.82 | | **Coercive Force (A/m)** | 8-16 | 1.2-2.4 | | **Residual Induction (T)** | 0.4-0.6 | 0.15-0.30 | --- #### **4. Mechanical Properties** | Property | Annealed | Quarter Hard | Half Hard | Full Hard | |----------|----------|--------------|-----------|-----------| | **Tensile Strength (MPa)** | 460-530 | 550-650 | 650-750 | 750-900 | | **Yield Strength (MPa)** | 230-300 | 450-550 | 550-670 | 670-820 | | **Elongation (%)** | 35-45 | 15-25 | 8-15 | 3-8 | | **Hardness (HV)** | 120-150 | 160-190 | 190-230 | 230-280 | --- #### **5. Product Specifications & Applications** **Strip Specifications:** * **Thickness Range:** 0.05 mm to 2.0 mm * **Width Range:** 2.0 mm to 300 mm * **Length:** Coils up to 2000 meters * **Thickness Tolerance:** ±3% standard, ±2% available * **Width Tolerance:** ±0.05 mm standard * **Surface Finish:** 0.4 μm Ra standard, 0.2 μm Ra available **Temper Conditions:** * **Annealed (O):** Optimal magnetic properties * **Quarter Hard (1/4H):** Moderate formability * **Half Hard (1/2H):** Limited formability * **Full Hard (H):** Spring temper **Primary Applications:** **Electronics & Instrumentation:** * **Transformer Laminations:** Precision cores for instruments and power transformers * **Magnetic Shielding Tapes:** Narrow shielding strips for cables and components * **Sensor Components:** Magnetic sensor elements and flux concentrators * **Relay Cores:** Precision relay magnetic components and armatures **Scientific & Research:** * **Research Apparatus:** Components for physics experiments and magnetic studies * **Laboratory Equipment:** Precision magnetic components for instruments * **Measurement Devices:** Elements for magnetic test and measurement equipment **Medical & Healthcare:** * **Medical Sensors:** Components for medical detection and monitoring systems * **Imaging Equipment:** Magnetic components for medical imaging devices * **Research Instrumentation:** Precision components for medical research equipment **Industrial Applications:** * **Control Instruments:** Magnetic components for industrial controls and automation * **Testing Equipment:** Elements for quality control and measurement instruments * **Current Transformers:** Precision cores for electrical measurement --- #### **6. International Standards** | Standard Type | Standard Number | Title / Specification | |---------------|----------------|----------------------| | **ASTM** | **ASTM A753** | Standard Specification for Nickel-Iron Soft Magnetic Alloys | | **ASTM** | **ASTM B48** | Standard Specification for Nickel Alloy Strip | | **IEC** | **IEC 60404-8-6** | Metallic Magnetic Materials | | **MIL-SPEC** | **MIL-N-14411** | Nickel-Iron Magnetic Alloys | | **AMS** | **AMS 7701/7702** | Aerospace Material Specifications | | **DIN** | **DIN 17745** | Nickel-Iron Alloys with Special Magnetic Properties | --- #### **7. Manufacturing & Processing** **Stamping & Forming:** * **Blank Size:** Up to 300 mm width in coil form * **Progressive Die Capability:** Excellent for high-volume production * **Minimum Bend Radius:** 2x thickness (annealed), 3x thickness (hard) * **Tooling Clearance:** 5-8% of material thickness recommended **Critical Heat Treatment:** * **Final Annealing:** 1100-1150°C in pure dry hydrogen atmosphere * **Stress Relief:** 400-500°C after forming operations * **Cooling Rate:** Controlled cooling >100°C/hour through Curie point * **Atmosphere Control:** Essential for optimal magnetic properties **Quality Control:** * **Dimensional Control:** Laser measurement for thickness and width * **Magnetic Testing:** Permeability verification on sample coupons * **Surface Inspection:** Automated surface defect detection * **Edge Quality:** Controlled slit edge condition --- #### **8. Special Features** **Precision Attributes:** * **Dimensional Stability:** Excellent for precision component manufacturing * **Magnetic Consistency:** Batch-to-batch magnetic property consistency * **Surface Quality:** Superior for critical magnetic applications * **Formability:** Excellent for high-speed stamping operations **Processing Guidelines:** * **Storage:** Dry, controlled environment recommended * **Handling:** Careful handling to prevent magnetic degradation * **Slitting:** Precision slitting to tight width tolerances * **Annealing:** Continuous annealing available for coil products --- **Summary** **Permalloy Strip** represents a precision form of these exceptional soft magnetic alloys, offering excellent dimensional control and consistent magnetic performance for mass-produced components. The availability of both Permalloy 45 (with higher saturation induction) and Permalloy 80 (with higher permeability) allows manufacturers to select the optimal material based on specific application requirements for transformer cores, magnetic shields, sensors, and precision electromagnetic components. The strip form enables high-volume, cost-effective production of complex magnetic components through progressive die stamping while maintaining the superior soft magnetic properties that define the Permalloy family. Compliance with **ASTM A753** and other international standards ensures material quality and performance consistency for automated production of components requiring the highest levels of magnetic permeability and minimum coercivity. Proper heat treatment in hydrogen atmosphere and careful processing are crucial to preserve the exceptional magnetic characteristics throughout the manufacturing process.

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 2554 gallon liquid totes Special package is available on request.