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

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

### **Mu-Metal / Hy-Mu 80 - Pipe 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 **Pipe** form provides tubular components for applications requiring cylindrical magnetic shielding and containment of magnetic fields in specialized electronic and scientific equipment. * **Common Names:** Mu-Metal Pipe, Hy-Mu 80 Pipe, High Permeability Alloy 80 Pipe --- #### **1. Chemical Composition** Precisely controlled chemistry ensures optimal magnetic properties in pipe 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 pipe 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)** **Pipe 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) * **Burst Pressure:** Varies with wall thickness and diameter --- #### **5. Product Specifications & Applications** **Pipe Specifications:** * **Diameter Range:** 6 mm to 200 mm OD * **Wall Thickness:** 0.5 mm to 12 mm * **Length:** Standard 3-6 meters, custom lengths available * **Tolerance:** OD ±0.5%, Wall ±10% * **Surface Finish:** 3.2 μm Ra standard, 1.6 μm Ra available **Types Available:** * **Seamless Pipe:** For high-integrity magnetic applications * **Welded Pipe:** Economical option for general applications * **Annealed Pipe:** Optimized magnetic properties * **Custom Fabricated:** Special diameters and configurations **Primary Applications:** **Electronics & Instrumentation:** * **Magnetic Shielding Tubes:** Cylindrical shields for sensitive components * **Sensor Housings:** Protection tubes for magnetic sensors * **Electron Beam Guides:** Magnetic containment for electron optics * **Transformer Bushings:** Magnetic flux containment components **Scientific & Research:** * **Particle Physics:** Beam line components and magnetic shielding * **Research Apparatus:** Laboratory equipment magnetic shielding * **Cryogenic Systems:** Magnetic shielding for low-temperature applications * **Vacuum Systems:** Magnetic shielding in vacuum environments **Medical & Healthcare:** * **MRI Components:** Peripheral magnetic shielding elements * **Medical Instrumentation:** Shielding for sensitive medical devices * **Research Equipment:** Components for medical research apparatus **Aerospace & Defense:** * **Avionics Shielding:** Magnetic protection for aircraft systems * **Satellite Components:** Spacecraft instrumentation protection * **Military Electronics:** Radar and communication system shielding --- #### **6. International Standards** Comprehensive international specifications for pipe 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 B829 | Standard Specification for Seamless Nickel Alloy Pipe | | **IEC** | IEC 60404-8-6 | Metallic Magnetic Materials | | **DIN** | DIN 17745 | Nickel-Iron Alloys with Special Magnetic Properties | --- #### **7. Manufacturing & Processing** **Fabrication Characteristics:** * **Machining:** Requires careful machining to avoid work hardening * **Bending:** Limited cold bending capability; anneal after severe deformation * **Welding:** Possible but degrades magnetic properties locally * **Joining:** Mechanical joining preferred over welding **Critical Heat Treatment:** * **Final Annealing:** 1100-1150°C in pure dry hydrogen atmosphere * **Stress Relief:** 400-500°C after fabrication * **Cooling Rate:** Controlled cooling >100°C/hour through critical range * **Atmosphere Control:** Essential for optimal magnetic properties **Quality Control:** * **Dimensional Inspection:** OD, wall thickness, and ovality verification * **Magnetic Testing:** Permeability measurement on sample coupons * **Surface Examination:** Visual and microscopic surface quality assessment * **Leak Testing:** For vacuum and pressure applications --- #### **8. Design Considerations** **Wall Thickness Selection:** * **Thin Wall (0.5-1.5 mm):** For lightweight magnetic shielding * **Standard Wall (1.5-4.0 mm):** General purpose magnetic applications * **Heavy Wall (4.0-12.0 mm):** For structural and high-flux applications **Magnetic Performance Factors:** * **Shielding Effectiveness:** Increases with wall thickness * **Frequency Response:** Optimal for DC and low-frequency fields * **Geometry Impact:** Cylindrical shape provides natural magnetic path * **Joint Design:** Critical for maintaining shielding continuity --- **Summary** **Mu-Metal (Hy-Mu 80) Pipe** provides a specialized tubular solution for applications requiring cylindrical magnetic shielding and containment. Its exceptional magnetic permeability, combined with good fabricability and consistent quality, makes it essential for sensitive electronic instrumentation, scientific research equipment, medical devices, and aerospace systems. The pipe form enables the creation of effective magnetic shields for cylindrical configurations, providing superior protection against low-frequency magnetic interference. Compliance with **ASTM A753** and other international standards ensures material consistency and performance reliability for demanding magnetic applications. Proper heat treatment and careful handling are essential to maintain the exceptional magnetic properties that define this premium soft magnetic material in tubular form.

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 2537 gallon liquid totes Special package is available on request.