Sandvik 20C

Stainless Steel

Sandvik 20C

Proprietary/trade-name steel grade Sandvik 20C

Chemical Composition (%)

C0.1
SI0.1
MN0.3
CR0
NI0
P0.04
S0.05

Applications

Manufacturer proprietary steel grade (trade name) per maker specification.

Available Forms

Bar, plate, sheet, tube, forgings, strip, wire, powder

Uses

Austenitic stainless steel with excellent corrosion resistance, formability and weldability; non-magnetic in annealed condition. High nickel (≈0.25%) stabilises the austenite and improves toughness and pitting resistance. 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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