1.4980

Stainless Steel

1.4980

Specialty steel grade. ; equiv UNS S66286 / AMS 5737). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.08
CR13.5
NI24
MO1
TI1.9

Mechanical Properties

Tensile:≥900 MPa;Yield:≥600 MPa

Chinese Standard

EN 10088 1.4980

Equivalent Standards

AMS 5737

Equivalent Grades

UNS S66286

Applications

铁基高温合金。,"Bar

Available Forms

Forging"

Uses

Austenitic stainless steel with excellent corrosion resistance, formability and weldability; non-magnetic in annealed condition. High nickel (≈25.5%) stabilises the austenite and improves toughness and pitting resistance. Molybdenum (≈1.25%) 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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