300 series stainless steels are also called as austenitic stainless steels as well as 18-8 chromium-nickel alloys. Containing a lot of chromium, the 300 series stainless steels therefore presents better resistant to rusting than other steels. Noticeably, they are able to keep their strength at higher temperatures; likewise, their ductility can be maintained at lower temperatures. Consequently, 300 series stainless steels are widely applied in many industries. All in all, they are non-magnetic, easy to machining, and difficult to rusting.

Stainless Steels Chemical Composition, %
TYPE C  Si  Mn  P  S Ni  Cr Mo Cu other
301 ≤0.15  ≤1.0  ≤2.0  ≤0.045 ≤0.030 6.00~8.00  16.00~18.00      
303 ≤0.15  ≤1.0  ≤2.0  ≤0.200 ≥0.15 8.00~10.00  17.00~19.00  ≤0.60    
303Cu ≤0.15  ≤1.00  ≤3.0  ≤0.200 ≥0.15 8.00~10.00  17.00~19.00  ≤0.60  1.5~3.50  
304 ≤0.08  ≤1.00  ≤2.0  ≤0.045 ≤0.030 8.00~10.50  18.00~20.00      
304L ≤0.03  ≤1.0  ≤2.0  ≤0.045 ≤0.03 9.0~13.0  18.00~20.00      
316F ≤0.08  ≤1.00  ≤2.00  ≤0.045 ≥0.10 10.00~14.00  16.00~18.00  2.00~3.00    
316 ≤0.08 ≤1.00 ≤2.00  ≤0.045 ≤0.030 10.00~14.00  16.00~18.00  2.00~3.00    
316L ≤0.03  ≤1.00  ≤2.0  ≤0.045 ≤0.030 12.00~15.00  16.00~18.00      
NSSC130M 0.07~0.12  ≤1.0 9.0~10.0 ≤0.030 ≤0.030 5.0~6.0 17.0~19.00 ≤0.060 N 0.20~0.3
DS205 ≤0.15 ≤1.0 18.0~19.00 ≤0.030 ≤0.030 2.00~3.00 17.00~18.00 N 0.3~0.4

* slightly magnetic property occurred after cold-working.