The effects of cold deformation (0% - 80% ) and 1000 ~ 1090 °C solid sulution treatment on the microstructure and magnetic properties of 0Crl8Nil2 and 0Crl6Nil4 austenitic stainless steels are discussed based on composition and structure stability. The results show that the austenite stability of stainless steel 0Crl8Nil2 and 0Crl6Nil4 is better than that of SUS304

and 0Crl6Nil4 is the best. Deformed martensite is formed during cold rolling deformation of stainless steel 0Crl8Nil2 and 0Crl6Nil4. The relative permeability of 0Crl6Nil4 during cold rolling is always below 1.010

the proportion of deformed martensite of 0Crl8Nil2 is up to 3.5%

and the relative permeability is increased to 1.353. After solution heat treatment

the relative permeability can be controlled below 1.010. Combined with the field production conditions

the heat treatment process of two kinds of austenitic stainless steels is solid solution treatment at 1060 °C for 80 s per mm.