Mu-Metal,Hy-Mu 80 Foil,Shim,,E FORU

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

### **Mu-Metal / Hy-Mu 80 - Foil & Shim 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 **Foil** and **Shim** forms provide ultra-thin, precision materials for applications requiring flexible magnetic shielding and precise gap-filling in sensitive electronic and scientific equipment. * **Common Names:** Mu-Metal Foil/Shim, Hy-Mu 80 Foil/Shim, High Permeability Alloy 80 Foil/Shim --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in thin sections. | 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 thin foil and shim applications. | Property | Value / Condition | Notes | |:---|:---|:---| | **Density** | 8.75 g/cm³ | | | **Thickness Range** | 0.025 mm to 0.5 mm | Foil: ≤0.1 mm, Shim: 0.1-0.5 mm | | **Width Availability** | Up to 300 mm | Slit to precise widths | | **Electrical Resistivity** | 0.58 μΩ·m at 20°C | | | **Curie Temperature** | 410 - 430 °C | | | **Surface Roughness** | 0.1-0.4 μm Ra | Optimized for magnetic applications | --- #### **3. Magnetic Properties** **Exceptional Magnetic Characteristics:** * **Initial Permeability (μi):** 25,000 - 45,000 (at 0.002T) * **Maximum Permeability (μmax):** 80,000 - 250,000 * **Saturation Induction (Bs):** 0.65 - 0.78 T (6,500 - 7,800 G) * **Coercive Force (Hc):** 1.0 - 2.0 A/m (0.012 - 0.025 Oe) * **Residual Induction (Br):** 0.15 - 0.35 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 (%) | |:---|:---|:---|:---|:---| | 0.025-0.05 | Annealed | 440-510 | 220-290 | 30-40 | | 0.05-0.1 | Annealed | 450-520 | 230-300 | 30-40 | | 0.1-0.25 | Annealed | 460-530 | 230-300 | 35-45 | | 0.25-0.5 | Annealed | 460-530 | 230-300 | 35-45 | --- #### **5. Product Forms & Specific Applications** **Foil Applications (≤0.1 mm):** * **Flexible Magnetic Shields:** Conformable shielding for irregular shapes * **CRT Display Liners:** Thin shielding for cathode ray tubes * **Sensor Wraps:** Protective magnetic wrapping for sensitive sensors * **Cable Shielding:** Magnetic shielding tapes for cables * **Electronic Package Liners:** Internal magnetic shielding layers **Shim Applications (0.1-0.5 mm):** * **Magnetic Gap Fillers:** Precise magnetic path optimization * **Transformer Shims:** Gap adjustment in magnetic circuits * **Motor Component Shims:** Magnetic path optimization in motors * **Sensor Mounting Shims:** Precision magnetic spacing * **Instrumentation Shims:** Magnetic adjustment in scientific instruments --- #### **6. International Standards** Compliance with thin material specifications. | Standard Type | Standard Number | Application | |:---|:---|:---| | **ASTM** | **ASTM A753** | Standard Specification for Nickel-Iron Soft Magnetic Alloys | | **MIL-SPEC** | **MIL-N-14411C** | Composition 1, Grade 1 | | **ASTM** | ASTM B90 | Standard for foil and shim thickness tolerances | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **AMS** | AMS 7702 | Aerospace Material Specification | --- #### **7. Special Features & Processing** **Unique Foil/Shim Characteristics:** * **Precision Thickness Control:** ±5% thickness tolerance standard, ±2% available * **Surface Finish Options:** Matte, bright, or specially prepared * **Slit Edge Quality:** Controlled edge condition for precision applications * **Cleanliness:** Ultra-clean processing for critical applications * **Flexibility:** Excellent conformability for complex shapes **Processing Guidelines:** * **Handling:** Requires careful handling to prevent creasing or work hardening * **Cutting:** Suitable for laser cutting, photochemical etching, and precision blanking * **Forming:** Excellent formability in annealed condition * **Annealing:** Special hydrogen annealing for optimal magnetic properties --- #### **8. Quality Assurance** * **Dimensional Verification:** 100% thickness monitoring during production * **Magnetic Testing:** Permeability verification on sample coupons * **Surface Inspection:** Visual and automated surface defect detection * **Metallurgical Quality:** Grain size control for consistent properties * **Certification:** Full traceability with material certification --- **Summary** **Mu-Metal (Hy-Mu 80) Foil and Shim** materials extend the application of this exceptional soft magnetic alloy to the thinnest possible dimensions while maintaining excellent magnetic permeability and shielding effectiveness. The precision thickness control, superior surface quality, and consistent magnetic properties make these ultra-thin forms essential for flexible magnetic shielding, precision magnetic circuit adjustment, and sensitive electronic applications where space constraints and exacting performance requirements demand the highest quality thin magnetic materials. Compliance with **ASTM A753** and other international standards ensures reliable performance in demanding applications requiring superior magnetic shielding and precise magnetic path control in miniature and flexible configurations.

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 2545 gallon liquid totes Special package is available on request.