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

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

### **Mu-Metal / Hy-Mu 80 - Sheet 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 **Sheet** form provides thin, flat material for applications requiring flexible magnetic shielding and excellent soft magnetic characteristics in electronic and scientific equipment. * **Common Names:** Mu-Metal Sheet, Hy-Mu 80 Sheet, High Permeability Alloy 80 Sheet --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in sheet 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 sheet 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. | Thickness (mm) | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | |:---|:---|:---|:---|:---| | 0.1-0.5 | Annealed | 460-530 | 230-300 | 35-45 | | 0.5-1.0 | Annealed | 470-540 | 240-310 | 35-45 | | 1.0-3.0 | Annealed | 470-540 | 240-310 | 35-45 | | 3.0-6.0 | Annealed | 480-550 | 250-320 | 30-40 | --- #### **5. Product Specifications & Applications** **Sheet Specifications:** * **Thickness Range:** 0.1 mm to 6.0 mm * **Width Range:** 100 mm to 600 mm * **Length:** Standard coils or cut lengths * **Thickness Tolerance:** ±5% standard, ±3% available * **Surface Finish:** 0.8 μm Ra standard, 0.4 μm Ra available **Temper Conditions:** * **Annealed:** Optimal magnetic properties, good formability * **Quarter Hard:** Moderate formability with increased strength * **Half Hard:** Limited formability, higher strength * **Full Hard:** Maximum strength, minimal formability **Primary Applications:** **Electronics & Instrumentation:** * **CRT Display Shields:** Magnetic shielding for cathode ray tubes * **Sensor Enclosures:** Magnetic shielding for sensitive sensors * **Transformer Covers:** Magnetic flux containment covers * **Electronic Equipment Shielding:** Cabinets and enclosures **Scientific & Research:** * **Laboratory Equipment Shields:** Magnetic shielding for instruments * **Research Apparatus:** Components for physics experiments * **Magnetic Measurement Equipment:** Shielding for sensitive detectors * **Vacuum System Components:** Magnetic shielding elements **Medical & Healthcare:** * **MRI Peripheral Shielding:** Supplementary magnetic shielding * **Medical Device Enclosures:** Shielding for sensitive medical equipment * **Research Instrumentation:** Components for medical research **Industrial Applications:** * **Test Chamber Liners:** Magnetic shielding liners * **Quality Control Equipment:** Magnetic shielding components * **Process Control Instruments:** Shielding for industrial sensors --- #### **6. International Standards** Comprehensive international specifications for sheet 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 Sheet | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **DIN** | DIN 17745 | Nickel-Iron Alloys with Special Magnetic Properties | --- #### **7. Manufacturing & Processing** **Forming Characteristics:** * **Deep Drawing:** Good in annealed condition with proper tooling * **Stamping:** Suitable for production of shielding components * **Bending:** Minimum bend radius 2x thickness (annealed) * **Blank Size:** Practical limits based on thickness and equipment **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 critical range * **Atmosphere Control:** Essential for optimal magnetic properties **Fabrication Guidelines:** * **Joining:** Mechanical fastening preferred; soldering acceptable * **Handling:** Avoid mechanical stress after final anneal * **Storage:** Flat storage with proper support * **Cleaning:** Avoid abrasive methods that induce stress --- #### **8. Quality Assurance** * **Dimensional Control:** Thickness, width, and flatness verification * **Magnetic Testing:** Permeability and coercive force measurement * **Surface Inspection:** Visual and automated surface quality assessment * **Mechanical Testing:** Tensile and hardness testing per lot * **Flatness Standards:** ≤3 mm per meter for most applications * **Certification:** Full material traceability with test reports --- **Summary** **Mu-Metal (Hy-Mu 80) Sheet** provides a versatile thin-gauge material solution for applications requiring flexible magnetic shielding and superior soft magnetic characteristics. Its exceptional magnetic permeability, combined with good formability and consistent quality, makes it ideal for electronic enclosures, scientific instruments, medical devices, and industrial shielding applications. The sheet form enables cost-effective manufacturing of complex shielding components through stamping, forming, and fabrication processes while maintaining the superior magnetic properties that define Mu-Metal. Compliance with **ASTM A753** and other international standards ensures material consistency and performance reliability for applications where maximum permeability and minimum coercivity are essential. Proper heat treatment, careful handling, and appropriate fabrication techniques are crucial to preserve the exceptional magnetic properties throughout the manufacturing process and 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 2540 gallon liquid totes Special package is available on request.