The alloy was melted by medium frequency induction furnace

and the test blocks of non-magnetic austenite stainless steel were poured by investment casting.By metallographic microscope

X-ray diffractometer

Instron 5882 universal material testing machine and vibrating sample magnetometer

the microstructure

mechanical properties and relative permeability of 304 austenitic stainless steel at as-cast and solid solution conditions were analyzed.Then

based on the experimental results of previous 304 austenitic stainless steel

a type of new as-cast non-magnetic austenitic stainless steel was prepared by changing the content of main alloy elements such as Mn

Ni and Cu.The results demonstrate that the relative permeability of solid solution（1 200℃×4 h）304 austenitic stainless steel sample is 1.008 7

which meets the requirements of non-magnetic materials（μr≤1.02）

presenting the satisfied mechanical properties.The as-cast new austenitic stainless steel is non-magnetic material with relative permeability 1.006 6 and desirable mechanical properties.