When a high-sensitivity power plant control room faced electromagnetic interference causing equipment malfunction, the solution came from an unexpected source: Mu Metal Round Bars. These magnetic shielding alloys diverted stray magnetic fields, restoring signal precision and process safety. Today, Mu Metal’s superior permeability and shielding performance make it the go-to material for engineers and procurement heads in chemical, marine, oil & gas, pharma, and power generation sectors where system stability cannot be compromised.
Table of Contents:
Mu Metal (ASTM A753 Alloy 4, UNS N14080) is a nickel‑iron soft ferromagnetic alloy engineered for optimal magnetic permeability, low coercivity, and minimal hysteresis loss. This 80Ni Fe alloy, enhanced with molybdenum, provides up to 105,000 relative permeability at 100 gauss. Its ability to redirect magnetic flux lines makes it indispensable for applications requiring high electromagnetic attenuation and interference shielding whether in marine navigation systems, MRI enclosures, or pharmaceutical test setups.
Aurico Alloys LLP offers Mu Metal Round Bars per ASTM A753 Alloy 4 and UNS N14080, available from 6mm–200mm diameter in bright, machined, or annealed condition. Each bar undergoes precision annealing to ensure maximum permeability with full test certification. As a trusted manufacturer, supplier, and stockist, Aurico Alloys LLP supports industries that require affordable, certified, and high-performance shielding materials for enhanced operational safety.
With high strength, exceptional corrosion resistance, and controlled magnetic response, Mu Metal’s combination of mechanical and magnetic properties outperforms traditional steel and stainless alloys. Its permeability in the stress‑annealed state exceeds 80,000 making it one of the most effective low-field magnetic shielding materials in the world.
High-quality Mu Metal Round Bars ready for industrial use.
Specification Overview
| Supplier & Manufacturer | Aurico Alloys LLP |
|---|---|
| Grade | Mu Metal (ASTM A753 Alloy 4 / UNS N14080) |
| Standards | ASTM A753 / UNS N14080 / DIN 17752 / EN 10204 / MIL‑N‑14411 |
| Diameter Range | 6mm – 200mm |
| Length | 100mm – 6000mm |
| Finish | Bright, annealed, machined, rough turned, or precision cut |
| Delivery | Full traceability, EN 10204 3.1 certification, export packaging |
Equivalent Grades & Standards
| Property | Value |
|---|---|
| UNS number | N14080 |
| Werkstoff / EN number | 2.4545 |
| EN designation | NiFe15Mo |
| Density | 8.74 g/cm3 |
| Melting range | 1454.4 °C |
| Maximum permeability | 200000 |
| Coercivity | 0.008-0.02 Oe |
| Residual induction | 3500 G |
| Curie temperature | 390 °C |
| Mean specific heat | 494 J/kg·K |
| Thermal conductivity | 34.6 W/m·K |
| Electrical resistivity (21 °C) | 58 µΩ·cm |
| Modulus of elasticity (cold drawn) | 232 GPa |
| Modulus of elasticity (hydrogen annealed 1121 °C) | 230 GPa |
| Modulus of elasticity (after process anneal 871 °C) | 217 GPa |
| Mean coefficient of thermal expansion (-75 to 25 °C) | 10.8 µm/m·°C |
| Mean coefficient of thermal expansion (-50 to 25 °C) | 10.7 µm/m·°C |
| Mean coefficient of thermal expansion (-25 to 25 °C) | 10.4 µm/m·°C |
| Mean coefficient of thermal expansion (25 to 50 °C) | 12.30 µm/m·°C |
| Mean coefficient of thermal expansion (25 to 100 °C) | 12.40 µm/m·°C |
| Mean coefficient of thermal expansion (25 to 200 °C) | 12.76 µm/m·°C |
| Mean coefficient of thermal expansion (25 to 300 °C) | 13.00 µm/m·°C |
| Mean coefficient of thermal expansion (25 to 400 °C) | 13.30 µm/m·°C |
Identifiers and physical constants for Mu-metal. A dash means no such designation is published for this grade.
Stock & Product Availability
Mu Metal Round Bars are stocked by Aurico Alloys LLP across diameters from 6mm to 200mm, with material supplied pre‑annealed or stress‑relieved. Each batch undergoes final hydrogen annealing to ensure magnetic uniformity and consistent permeability, meeting all project specifications in chemical, marine, power, and pharmaceutical sectors.
Chemical Composition
| Element | Min (%) | Max (%) |
|---|---|---|
| Nickel (Ni) | 80 | 82 |
| Molybdenum (Mo) | 3.5 | 6 |
| Manganese (Mn) | — | 0.8 |
| Silicon (Si) | — | 0.5 |
| Cobalt (Co) | — | 0.5 |
| Copper (Cu) | — | 0.30 |
| Chromium (Cr) | — | 0.30 |
| Phosphorus (P) | — | 0.02 |
| Sulfur (S) | — | 0.01 |
| Carbon (C) | — | 0.05 |
| Iron (Fe) | — | Balance |
Composition limits for Mu-metal. These are specification limits for the grade, not measured values for a lot; the mill test certificate supplied with your order states the actual analysis.
Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 530 (annealed) | 700 (stress annealed) |
| Yield Strength (MPa) | 160 (annealed) | 280 (stress annealed) |
| Elongation (%) | 32 (annealed) | 45 (stress annealed) |
| Hardness (Hv) | 120 (annealed) | 160 (stress annealed) |
| Curie Temperature (°C) | 420 |
| Electrical Resistivity (µΩ·cm) | 60 |
| Thermal Conductivity (W/m·K) | 19 |
| DC Permeability @ 100 gauss | ~105,000 |
| Magnetic Saturation (Gauss) | 7600 |
Applications & Benefits
- Chemical: instrument housings and analyzers shielded from electromagnetic disturbance
- Marine: navigation compass shielding and control panels for signal stability
- Oil & Gas: EMI-protected control modules, safety sensors, and monitoring housings
- Pharma: cleanroom equipment shielding, MRI and medical imaging devices
- Power Generation: transformer cores, measurement instruments, and hydro generators needing EMI control
FAQ & Search Insights
Global Export Destinations
We ship worldwide from Mumbai. See every destination we export to on our export markets page.
Domestic Supply Network Across India
We deliver across India from our Mumbai stockyard. See every city we supply on our supply locations page.
Conclusion
Mu Metal Round Bars from Aurico Alloys LLP deliver world-class magnetic shielding, ASTM-certified performance, and unmatched durability for industries where precision electromagnetic control is vital. Are your systems protected by the superior shielding power of Mu Metal?