Mu Metal Shielding Tube

Mumetal is a nickel-molybdenum-iron alloy which is used extensively in magnetic shielding applications. This very special material has a high magnetic susceptibility to an applied magnetic field, which can therefore be exploited by redirecting magnetic field lines away from areas that need to be shielded. By creating the hollow structure of a Mumetal tube you can produce an effective shield that protects the contents of its tube from magnetic fields.

Mu Metal shielding tube is a major protecting method in magetic fields, which obtains double actions: one is to prevent or reduce the electromagnetic interference from outer field, the other is to prevent or reduce the part's own electromagnetic field affecting any other relevant parts.

Shielding tubes including one-piece shield, two-piece shields and multi-compartmental shield are packaged for surface mount applications for a wide range of industries.

The material required for shielding are mainly conducting materials with low resistivity & high permeability. The most effective magnetic shielding material available is Mu Metal, an alloy of 77% nickel, 16% iron, 5% copper, and 2% chromium, which is then annealed in a hydrogen atmosphere to increase its permeability. As mu-metal is comparatively expensive, other alloys with similar compositions are also applied for magnetic shielding, which contains around 80% nickel.

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