What is the difference between 303 and 303Se?
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I would like to ask the experts: what are the differences between the 303 and 303Se stainless steels?
Stainless steels 303 and 303Se: These are free-cutting stainless steels containing S and Se respectively, and are used in applications where free cutting and high surface finish are required. 303Se stainless steel tubes fall under the international stainless steel designation system.
303 Chemical composition: C: ≤0.15%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.20%, S: ≥0.15%, Cr: 17.00–19.00 (%), Ni: 8.00–10.00 (%). 303Se chemical composition: C: ≤0.15%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.20%, S: 0.060%, Cr: 17.00–19.00 (%), Ni: 8.00–10.00 (%), Se: ≥0.015