MuMETAL® is our most widely known brand, yet Magnetic Shield Corporation offers several other alloys which are used for similar, but different applications. MuMETAL® Stress Annealed sheet is used primarily in low intensity fields where high attenuation is desired (high initial permeability & high shielding efficiency). Available as stress annealed (partially annealed for ease of machinability). MuMETAL® is used for fabricated shields such as enclosures, cylinders, cans, channels or 3D boxes. Typically, atmospherically controlled Perfection Annealing is required after stamping, machining, bending, rolling or welding to provide maximum shielding performance.