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The order of corrosion resistance of austenitic stainless steel from low to high is as follows: Pitting corrosion/intergranular corrosion resistance sorting: 1cr18ni9ti → 0cr18ni9(304) → 0cr18ni9ti(321) → 00cr19ni10(304l) → 0cr17ni12mo2ti(316) → 00cr17ni14mo2(316l) → 00cr19ni13mo3(317l) → 00cr20ni25mo4.5cu(904l) → 00cr27ni31mo4cu Ferritic stainless steel corrosion resistance ranked from low to high: 0cr13(410s) → 0cr13al(405) → 00cr12ti(409l) → 00cr17(430lx) → 00cr18mo2 → 00cr26mo1 → 00cr30mo2 Ferritic stainless steel itself is naturally much more resistant to stress corrosion cracking caused by chloride ions than austenitic stainless steel, and grades containing Ti/Nb stabilization design have more outstanding resistance to intergranular corrosion. Duplex stainless steel corrosion resistance ranked from low to high: 00cr18ni5mo3si2(3re60) → 00cr22ni5mo3n(saf2205) → 00cr25ni7mo4n(saf2507) Compared with ordinary austenitic stainless steel, duplex stainless steel has significantly improved resistance to intergranular corrosion, pitting corrosion and stress corrosion. Special ranking for stress corrosion resistance (low to high): 16mnr → 20r → 07/09cr2almore → 00cr17ni14mo2(316l) → 00cr19ni13mo3(317l) → 00cr20ni25mo4.5cu(904l) → 00cr18ni5mo3si2(3re60) → 00cr22ni5mo3n(saf2205) → 00cr25ni7mo4n(saf2507) → 0cr13(410s) → 00cr12ti(409l) → 00cr17(430lx) → 00cr18mo2 → 00cr26mo1