022Cr17Ni12Mo2Ti

Stainless Steel

022Cr17Ni12Mo2Ti

High-Mo austenitic, enhanced corrosion resistance. (GB/T 20878; equiv ASTM 317 / JIS SUS317). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.08
CR18
NI11
MO3

Mechanical Properties

Tensile:≥515 MPa;Yield:≥205 MPa

Chinese Standard

T 20878 022Cr17Ni12Mo2Ti

Equivalent Standards

ASTM 317

Equivalent Grades

JIS SUS317

Applications

高钼奥氏体，耐蚀更强。,"Plate

Available Forms

Bar"

Uses

Austenitic stainless steel with excellent corrosion resistance, formability and weldability; non-magnetic in annealed condition. High nickel (≈13%) stabilises the austenite and improves toughness and pitting resistance. Molybdenum (≈3.5%) enhances resistance to chloride pitting and crevice corrosion — suited to marine and chemical service. Used in food processing, chemical plant, architecture, heat exchangers, kitchenware and medical devices.

Heat Treatment

Solution anneal 1010–1150 °C followed by rapid water quench to retain austenite; not hardenable by heat treatment. Sensitization avoided by low carbon or stabilizers (Ti/Nb).

Precautions

Weld with low-carbon or stabilized filler (e.g., 316L, 347) to avoid sensitization; passivate after fabrication. Not hardenable, but work-hardens rapidly — use sharp tools and rigid setups. Avoid chloride contact for 304 in warm service; specify 316/317 for marine or aggressive media.

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