Mu-Metal,Hy-Mu 80 Strip,,E FORU

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

### **Mu-Metal / Hy-Mu 80 - Strip Product Overview** **Mu-Metal**, commercially known as **Hy-Mu 80**, 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 magnetic shielding properties. * **Common Names:** Mu-Metal Strip, Hy-Mu 80 Strip, High Permeability Alloy 80 Strip --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in strip form. | Element | Percentage (%) | Role in the Alloy | |:---|:---|:---| | **Nickel (Ni)** | 77.0 - 81.0 | Primary element for high permeability | | **Iron (Fe)** | Balance | Base magnetic element | | **Molybdenum (Mo)** | 4.50 - 5.50 | Enhances permeability and reduces coercivity | | **Copper (Cu)** | 0.10 - 0.30 | Improves corrosion resistance | | **Chromium (Cr)** | 0.10 - 0.30 | Enhances workability | | **Manganese (Mn)** | 0.30 - 0.60 | Deoxidizer and sulfur control | | **Silicon (Si)** | 0.10 - 0.30 | Improves magnetic properties | | **Carbon (C)** | 0.02 max | Minimized for optimal magnetic softness | --- #### **2. Physical Properties** Exceptional magnetic properties optimized for strip applications. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.75 g/cm³ (0.316 lb/in³) | | | **Melting Point** | ~1450 °C (2640 °F) | | | **Curie Temperature** | 410 - 430 °C (770 - 806 °F) | | | **Electrical Resistivity** | 0.58 μΩ·m at 20°C | | | **Thermal Conductivity** | 17 W/m·K at 20°C | | | **Thermal Expansion Coefficient** | 12.5 μm/m·°C (20-300°C) | | | **Specific Heat** | 0.46 J/g·°C at 20°C | | --- #### **3. Magnetic Properties** **Exceptional Magnetic Characteristics:** * **Initial Permeability (μi):** 30,000 - 50,000 (at 0.002T) * **Maximum Permeability (μmax):** 100,000 - 300,000 * **Saturation Induction (Bs):** 0.70 - 0.82 T (7,000 - 8,200 G) * **Coercive Force (Hc):** 0.8 - 1.6 A/m (0.01 - 0.02 Oe) * **Residual Induction (Br):** 0.20 - 0.40 T * **Hysteresis Loss:** Extremely low --- #### **4. Mechanical Properties** Properties vary with thickness and temper condition. | 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 * **Magnetic Shielding Tapes:** Narrow shielding strips * **Sensor Components:** Magnetic sensor elements * **Relay Cores:** Precision relay magnetic components **Scientific & Research:** * **Research Apparatus:** Components for physics experiments * **Laboratory Equipment:** Precision magnetic components * **Measurement Devices:** Elements for magnetic test equipment **Medical & Healthcare:** * **Medical Sensors:** Components for medical detection systems * **Imaging Equipment:** Magnetic components for medical imaging **Industrial Applications:** * **Control Instruments:** Magnetic components for industrial controls * **Testing Equipment:** Elements for quality control instruments --- #### **6. International Standards** Comprehensive international specifications for strip products. | Standard Type | Standard Number | Title / Specification | |:---|:---|:---| | **ASTM** | **ASTM A753** | Standard Specification for Nickel-Iron Soft Magnetic Alloys | | **MIL-SPEC** | **MIL-N-14411C** | Composition 1, Grade 1 | | **AMS** | **AMS 7702** | Aerospace Material Specification | | **ASTM** | ASTM B48 | Standard Specification for Nickel Alloy Strip | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **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:** Suitable for 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 * **Cooling Rate:** Controlled cooling >100°C/hour through critical range * **Atmosphere Control:** Essential for optimal magnetic properties **Quality Control:** * **Dimensional Control:** Laser measurement for thickness and width * **Magnetic Testing:** Permeability verification on samples * **Surface Inspection:** Automated surface defect detection * **Edge Quality:** Controlled slit edge condition --- #### **8. Special Features** **Precision Attributes:** * **Dimensional Stability:** Good for precision components * **Magnetic Consistency:** Batch-to-batch magnetic property consistency * **Surface Quality:** Suitable for magnetic applications * **Formability:** Adequate for component manufacturing **Processing Guidelines:** * **Storage:** Dry, controlled environment * **Handling:** Careful handling to prevent magnetic degradation * **Slitting:** Precision slitting to width tolerances * **Annealing:** Continuous annealing for coil products --- **Summary** **Mu-Metal (Hy-Mu 80) Strip** represents a precision form of this exceptional soft magnetic alloy, offering excellent dimensional control and consistent magnetic performance for mass-produced components. Its unparalleled magnetic permeability characteristics, combined with adequate stamping properties and surface quality, make it essential for modern electronics manufacturing, particularly in transformer cores, magnetic 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 magnetic properties that define Mu-Metal. 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.

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 2541 gallon liquid totes Special package is available on request.