Sunday, 22 December 2019

Is Stainless Steel Magnetic

  Daman       Sunday, 22 December 2019
 Is Stainless Steel Magnetic - A permanent magnet is a naturally occurring magnet. Since it is not strong enough for many purposes, so a strong permanent magnet is made from stainless steel instead of soft iron.  

The dependency of Stainless Steel
  • Nickel alter Structure and sometimes turns to nonmagnetic.
  • Overall, Type of alloy included  
  • Addition of Chromium turns rust-free, self -repair

The current is passed in a coil of insulated copper wire wound around the steel piece. Once magnetized, it does not lose its magnetism easily (since steel has more retentivity than soft iron) so it becomes a permanent magnet. The permanent magnets are used in electric meters (e.g., galvanometer, ammeter, voltmeter) and in magnetic compass, etc.


Is Stainless Steel Magnetic




What makes Stainless Steel Magnetic

 

Magnetic materials are broadly classified as diamagnetic, paramagnetic and ferromagnetic. However, there exist some other types of magnetic materials with mysterious properties. These include ferrimagnetic, anti-ferromagnetic, spin glass, etc.



On the basis of their behaviour in external magnetic fields, Faraday classified the various substances into three categories


  • Diamagnetic substances - These are those which develop feeble magnetization in the opposite direction of the magnetizing field. Such substances are feebly repelled by magnets and tend to move from stronger to weaker parts of a magnetic field.
Examples. Bismuth, copper, lead, zinc, tin, gold, silicon, nitrogen (at STP), water, sodium chloride, etc.
 

  • Paramagnetic substances. Paramagnetic substances are those which develop feeble magnetization in the direction of the magnetizing field. Such substances are feebly attracted by magnets and tend to move from weaker to us her stronger parts of a magnetic field.

Examples. Manganese, aluminum, chromium, platinum, sodium, copper chloride, oxygen (at STP), etc.

  • Ferromagnetic substances. Ferromagnetic substances are those which develop strong magnetization in the direction of the magnetizing field. They are strongly attracted by magnets and tend to move from weaker to stronger parts of a magnetic field.

Examples. Iron, cobalt, nickel, gadolinium, and alloys like alnico.

 

Is Steel Magnetic



The answer is Yes, steel is magnetic. The choice of magnetic materials for making permanent magnets electromagnets and cores of transformers is decided from the hysteresis loop of the material.

The material used for making permanent magnets must have the following characteristics :

  • High retentivity so that it produces a strong magnetic field.


  • High coercivity so that its magnetization is not destroyed by stray magnetic fields, temperature variations or minor mechanical damage.


  • High permeability.

In spite of its slightly smaller retentivity than soft iron, steel is favored for making permanent magnets.  Stainless steel is Magnetic.


Steel has much higher coercivity than soft iron. The magnetization of steel is not easily destroyed by stray fields. Once magnetized under a strong field, it retains magnetization materials for a long duration. Other suitable materials for making permanent magnets are:
  • Cobalt steel
  • Carbon steel 
  • Alnico
  • Tri-conal

Basic Structure Includes


  • 'ferritic' structure and is magnetic.


 Overall, stainless steel is magnetic.

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