08X18H12B

Stainless Steel

08X18H12B

Nb-stabilized austenitic, for welding & high-temp service. (GOST 5632; equiv ASTM 347 / EN 1.4550 / JIS SUS347). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.08
CR17
NI9
NB10

Mechanical Properties

Tensile:≥515 MPa;Yield:≥205 MPa;Elong:≥40%

Chinese Standard

GOST 5632 08X18H12B

Equivalent Standards

ASTM 347

Equivalent Grades

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.

Applications

铌稳定奥氏体，焊接高温用。,"Plate

Available Forms

Bar

Uses

Tube"

Heat Treatment

Austenitic stainless steel with excellent corrosion resistance, formability and weldability; non-magnetic in annealed condition. High nickel (≈11%) stabilises the austenite and improves toughness and pitting resistance. Used in food processing, chemical plant, architecture, heat exchangers, kitchenware and medical devices.

Precautions

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).

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