1. In general, although the magnetic properties of the 300 series of stainless steel austenitic structure are not explicit, the cold working process may be transformed into a significant magnetic field of martensite organization. The magnetic relative increase by two cold working process stated below,

(1)The reduction in stability degree of austenitic organization (alloy design)

(2)As cold working amount is increased, it will generate more martensite organization.

There are opportunities to eliminate this part of the magnetic and processing pressure by fully solid solution annealing which is quenching after heating.
 
2. Effect of cold working on austenitic stainless steel: