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

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

### **Mu-Metal / Hy-Mu 80 - Plate 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 **Plate** form provides flat, dimensionally stable stock material for manufacturing large-area magnetic shielding components and structural elements requiring superior soft magnetic characteristics. * **Common Names:** Mu-Metal Plate, Hy-Mu 80 Plate, High Permeability Alloy 80 Plate --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in plate 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 plate 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 (Annealed Condition)** **Plate Mechanical Characteristics:** * **Tensile Strength:** 470-540 MPa (68-78 ksi) * **Yield Strength (0.2% Offset):** 240-310 MPa (35-45 ksi) * **Elongation:** 30-40% in 2 inches * **Hardness:** 63-78 HRB * **Modulus of Elasticity:** 150 GPa (21.8 × 10⁶ psi) * **Shear Strength:** 380 MPa (55 ksi) * **Fatigue Strength:** 220 MPa (32 ksi) at 10⁸ cycles --- #### **5. Product Specifications & Applications** **Plate Specifications:** * **Thickness Range:** 5.0 mm to 100 mm * **Width Range:** 200 mm to 1500 mm * **Length Range:** 1000 mm to 3000 mm * **Thickness Tolerance:** ±5% standard, ±3% available * **Flatness:** ≤3 mm per meter standard * **Surface Finish:** 3.2 μm Ra standard, 1.6 μm Ra available **Types Available:** * **Hot Rolled Plate:** For general magnetic applications * **Annealed Plate:** Optimized magnetic properties * **Stress-Relieved Plate:** For machining stability * **Precision Ground Plate:** For critical thickness applications **Primary Applications:** **Electronics & Instrumentation:** * **Magnetic Shield Enclosures:** Large-area shielding for electronic equipment * **Instrument Base Plates:** Vibration-isolated magnetic bases * **Test Chamber Walls:** Magnetic shielding for testing facilities * **Transformer Base Plates:** Magnetic flux containment foundations **Scientific & Research:** * **Research Chamber Components:** Magnetic shielding for experimental apparatus * **Physics Laboratory Equipment:** Shielding plates for sensitive measurements * **Magnetic Test Equipment:** Components for magnetic measurement systems * **Vacuum Chamber Flanges:** Magnetic shielding for vacuum systems **Medical & Healthcare:** * **MRI Room Shielding:** Peripheral magnetic shielding components * **Medical Equipment Bases:** Magnetic bases for sensitive medical devices * **Research Instrumentation:** Components for medical research equipment **Industrial Applications:** * **Magnetic Shielding Rooms:** Construction panels for shielded enclosures * **Testing Facility Components:** Magnetic shielding for industrial test areas * **Quality Control Equipment:** Magnetic bases for measurement instruments --- #### **6. International Standards** Comprehensive international specifications for plate 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 Plate | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **DIN** | DIN 17745 | Nickel-Iron Alloys with Special Magnetic Properties | --- #### **7. Manufacturing & Processing** **Machining Characteristics:** * **Machinability Rating:** 25% (compared to free-cutting brass) * **Recommended Tools:** Sharp carbide tools with positive rake angles * **Cutting Speed:** 20-35 m/min for milling operations * **Feed Rate:** 0.1-0.3 mm/tooth for milling * **Coolant Requirements:** Essential for optimal tool life **Critical Heat Treatment:** * **Final Annealing:** 1100-1150°C in pure dry hydrogen atmosphere * **Stress Relief:** 400-500°C after heavy machining * **Cooling Rate:** Controlled cooling >100°C/hour through critical range * **Atmosphere Control:** Essential for optimal magnetic properties **Fabrication Guidelines:** * **Forming:** Good formability in annealed condition * **Joining:** Mechanical fastening preferred over welding * **Handling:** Avoid mechanical stress after final anneal * **Storage:** Flat storage with proper support --- #### **8. Quality Assurance** * **Chemical Certification:** Mill certificate with heat analysis * **Dimensional Verification:** Thickness, flatness, and dimensional checks * **Magnetic Testing:** Permeability and coercive force measurement * **Ultrasonic Testing:** For internal quality assessment of thick plates * **Mechanical Testing:** Tensile and hardness testing per ASTM standards * **Flatness Verification:** Precision measurement across plate surface --- **Summary** **Mu-Metal (Hy-Mu 80) Plate** provides stable, flat stock material for manufacturing large-area magnetic shielding components and structural elements requiring the highest levels of magnetic permeability. Its exceptional soft magnetic properties, combined with good dimensional stability and adequate machinability, make it essential for sensitive instrumentation, research equipment, medical systems, and industrial magnetic shielding applications. The plate form enables the creation of large, stable magnetic shielding surfaces and structural components where maximum permeability and minimum coercivity are crucial. Compliance with **ASTM A753** and other international standards ensures material consistency and performance reliability for demanding magnetic applications. Proper heat treatment, careful handling, and appropriate fabrication techniques are essential 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 2539 gallon liquid totes Special package is available on request.