Focus On Magival

Magival is a range of ferritic stainless steels, with a high degree of machinability, developed for magnetic applications where there are requirements for:

  • high magnetic permeability
  • low coercive force

It is wholly produced by Valbruna in Vicenza, Italy; from melting to cold working.  Carefully controlled chemical analyses and sophisticated working processes create a ferritic structure which is highly sensitive to variations in a magnetic field.  This avoids the need for expensive heat treatment by the user after machining.  Due to its extreme ease of magnetization and demagnetization, the Magival steels can be used to advantage in the manufacture of:

  • Magnetic cores
  • solenoid valves
  • electromagnetic devices
  • flow regulators
  • relays

Permeameters

PermeameterProduce hysteresis cycles and normal measurements of magnetization of magnetic stainless steels. Using SANFORD - BENNET allows us to perform measurements on samples or round bars, square, flat, hexagonal and polygonal.  Completely automated are: control of parameters Br, Hc, Bsat, Jsat, µmax and elaboration of data is done by dedicated software.
  

Coercimeter

Is an automatic device which allows for precise measurements of coercitive force of steel samples in any form, regular or irregular and details which are custom made or assembled with other materials.

Heat treatment on finished products

Any mechanical working alters the magenetic properties of a material to some extent.  In any case, thanks to the particular characteristics of Magival® ground annealed, the variation induced by mechanical working is contained in levels so as to make it unnecessary to perfom heat treatment on finished products.
In case of finishing status different from ground (hot rolled, cold drawn, peeled-reeled) we reccomend, after mechanical working by the client, annealing treatment to obtain optimum magnetic characterisitics.

MG1MG2MG3MG4MG5
AFNOR Z 8 CF 17 ASTM A 838 ALLOY 2 AFNOR Z 8 CDF 19 02 Steel similar to ASTM A582 S18235
ASTM A 838 ALLOY 1   ASTM A 582 XM 34 ASTM 838 - ALLOY 2 W. Nr. 1.4523
ASTM A 582 430 F     With Molybdenum 1.5 - 2.2%  
DIN 17440 W. Nr. 1.4105     W. Nr. 1.4106  
 
The best known type, finding wide use in the automobile industries and for household electrical apparatus and appliances. Used in components of megnetic devices where high values of magnetic permeability and low values of coercive force are required. Its field of application is as for MG1.  It is used where a greater resistance to corrosion is required, thanks to its molybdenum content. Its composition has been developed for applications requiring better mgnetic characteristics and high corrosion resistance. These properties are obtained thanks to a low content of interstitial elements and a high molybdenum content. Ferritic Stainless Steel with Mo and Ti characterised by an improved machinability and with a better corrosion resistance than 430F series.