Difference between stainless steel 321 and 304

stainless steel 321 and 304 are 300 stainless steel series.

National standard brand and chemical composition.

304 stainless steel plate is a universal stainless steel. The chemical composition of 304 stainless steel plate is C: 0.07; Si: 0.75; Mn: 2.00; P: 0.045; S: 0.030; Ni: 8.00 ~ 10.50; Cr: 17.50-19.50; N: 0.10.

321 stainless steel can improve the intergranular corrosion tendency by adding Ti to 304 stainless steel. The national standard is 06cr18ni11ti. Chemical composition of 321 stainless steel: C: 0.08; Si: 0.75; Mn: 2.00; P: 0.045; S: 0.030; Ni: 9.00-12.00; Cr: 17.00-19.00; N: 0.10; Ti: 5xc

There is little difference in corrosion resistance between 304 stainless steel plate and 321 stainless steel. However, 321 stainless steel is mostly used under the heat-resistant working condition of 500-600 ° C. 321 stainless steel has TI as a stabilizing element, which has better intergranular corrosion resistance and high temperature strength. It can be used to manufacture wear-resistant acid containers, wear-resistant equipment parts and pipes.