F317L

Stainless Steel

F317L

High-Mo austenitic, enhanced corrosion resistance. (ASTM A182; 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

ASTM A182 F317L

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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