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

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

### **Mu-Metal / Hy-Mu 80 - Fittings 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 **Fittings** form encompasses precision-manufactured components designed for connecting, terminating, or transitioning magnetic shielding systems in high-performance electronic and scientific applications. * **Common Names:** Mu-Metal Fittings, Hy-Mu 80 Fittings, High Permeability Alloy 80 Fittings --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in finished fittings. | 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 manufacturability | | **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 fittings 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** Typical properties for fittings in annealed condition. * **Tensile Strength:** 480-550 MPa (70-80 ksi) * **Yield Strength (0.2% Offset):** 250-320 MPa (36-46 ksi) * **Elongation:** 35-45% in 2 inches * **Hardness:** 65-80 HRB * **Modulus of Elasticity:** 150 GPa (21.8 × 10⁶ psi) * **Impact Strength:** 40-60 J (Charpy V-notch) --- #### **5. Product Specifications & Applications** **Fittings Types and Configurations:** * **Connector Fittings:** - Magnetic shield connectors - Feedthrough adapters - Flange connectors - Transition fittings * **Adapter Fittings:** - Size reducers/enlargers - Angle connectors (45°, 90°) - Cross and tee fittings - Custom transition pieces * **Specialty Fittings:** - Custom-shaped shielding components - Complex geometric assemblies - Integrated mounting fittings - Vacuum-compatible fittings **Primary Applications:** **Electronics & Instrumentation:** * **CRT Display Fittings:** Magnetic shielding connectors for display systems * **Sensor Housing Fittings:** Protection fittings for magnetic sensors * **Electron Microscope Components:** Magnetic shielding connectors * **Transformer Enclosure Fittings:** Magnetic flux containment fittings **Scientific & Research:** * **Research Chamber Fittings:** Magnetic shielding connectors for experimental apparatus * **Laboratory Equipment:** Specialized fittings for sensitive instruments * **Physics Research:** Beam line component fittings * **Vacuum System Fittings:** Magnetic shielding for vacuum applications **Medical & Healthcare:** * **MRI System Fittings:** Peripheral magnetic shielding components * **Medical Equipment:** Shielding fittings for sensitive medical devices * **Research Instrumentation:** Components for medical research equipment **Aerospace & Defense:** * **Avionics Shielding Fittings:** Magnetic protection for aircraft systems * **Satellite Component Fittings:** Spacecraft instrumentation protection * **Military Electronics:** Radar and communication system shielding fittings --- #### **6. International Standards** Comprehensive international specifications for fittings 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 | | **ISO** | ISO 9711 | Metallic Materials for Special Applications | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **DIN** | DIN 17745 | Nickel-Iron Alloys with Special Magnetic Properties | --- #### **7. Manufacturing & Quality Assurance** **Manufacturing Processes:** * **Precision Machining:** CNC turning, milling, and grinding * **Forming:** Cold and hot forming for complex shapes * **Joining:** Mechanical fastening preferred; limited welding * **Surface Treatment:** Special coatings and finishes **Quality Control Measures:** * **Dimensional Inspection:** CMM verification of critical dimensions * **Magnetic Testing:** Permeability verification on sample coupons * **Leak Testing:** For vacuum and sealed applications * **Metallurgical Examination:** Grain structure and integrity assessment **Special Features:** * **Custom Engineering:** Tailored solutions for specific applications * **Prototype Development:** Rapid prototyping capabilities * **Volume Production:** Manufacturing capacity for production quantities * **Quality Certification:** ISO 9001, AS9100 compliance --- #### **8. Design Considerations** **Critical Design Parameters:** * **Magnetic Continuity:** Ensuring uninterrupted magnetic path * **Wall Thickness:** Optimized for magnetic performance and mechanical strength * **Joint Design:** Critical for maintaining shielding effectiveness * **Stress Management:** Minimizing mechanical stress in magnetic components **Application-Specific Configurations:** * **High-Vacuum Fittings:** Optimized for vacuum system applications * **Cryogenic Fittings:** Designed for low-temperature service * **Radiation-Hardened Fittings:** Suitable for nuclear applications * **Precision Instrument Fittings:** For sensitive measurement equipment --- **Summary** **Mu-Metal (Hy-Mu 80) Fittings** provide engineered solutions for complex magnetic shielding applications requiring precise mechanical interfaces and reliable performance. Their exceptional magnetic permeability characteristics, combined with good manufacturability and consistent quality, make them essential for critical systems in scientific research, medical imaging, aerospace, and precision instrumentation. The fittings form enables the creation of sophisticated magnetic shielding assemblies where maximum permeability and minimum coercivity must be maintained through complex geometrical transitions. Compliance with **ASTM A753** and other international standards ensures material consistency and performance reliability for demanding applications where superior magnetic shielding effectiveness and precise mechanical fit are essential requirements. Proper heat treatment, careful handling, and appropriate joint design are crucial to preserve the exceptional magnetic properties throughout the system lifecycle.

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 2542 gallon liquid totes Special package is available on request.