Ferritic stainless steel with improved strength, workability, and corrosion resistance

Abstract

Disclosed is a ferritic stainless steel with improved strength, workability, and corrosion resistance, which may be applied to various industrial fields, such as washing machines, refrigerators, and all kinds of electric home appliances. An embodiment of the disclosed ferritic stainless steel comprises, in percent by weight (wt %), 0.0005 to 0.02% of C, 0.005 to 0.02% of N, 0.7 to 1.0% of Si, 16.0 to 17.0% of Cr, 0.05 to 0.3% of Ti, and the balance being Fe and inevitable impurities, wherein the ferritic stainless steel has a value of Formula (1) below satisfying 21 to 25, a tensile strength of 470 MPa or more, and an elongation of 27% or more.7*Si+Cr  (1)In Formula (1), Si and Cr represent the contents (wt %) of the respective elements.

1 . A ferritic stainless steel comprising, in percent by weight (wt %), 0.0005 to 0.02% of C, 0.005 to 0.02% of N, 0.7 to 1.0% of Si, 16.0 to 17.0% of Cr, 0.05 to 0.3% of Ti, and the balance being Fe and inevitable impurities,
 wherein a value of Formula (1) below satisfies 21 to 25, a tensile strength is 470 MPa or more, and an elongation is 27% or more:
   7*Si+Cr  (1)
 
   (wherein in Formula (1), Si and Cr represent the contents (wt %) of the respective elements).   
     
     
         2 . The ferritic stainless steel of  claim 1 , wherein a value of Formula (2) below satisfies 20 or more, and a pitting potentials is 150 mV or more:
   Cr+4*Si+0.1*Ti/(C+N)  2)
   (wherein in Formula (2), Cr, Si, Ti, C, and N represent the contents (wt %) of the respective elements)