JIS G4304 / G4312 SUS 304 Stainless Steel Composition & General‑Purpose Austenitic Properties

SUS 304 is the most widely used austenitic stainless steel in JIS G4304 / G4312. With 18–20% chromium and 8–10.5% nickel, it is the classic 18‑8 stainless steel. It offers a balanced combination of corrosion resistance, formability, and weldability.

304 performs well in atmospheric conditions, fresh water, food‑grade media, and mildly corrosive environments. It is widely used in kitchen equipment, food‑processing machinery, architectural components, pressure vessels, piping systems, and mechanical parts. SUS 304 is supplied as cold‑rolled sheets, hot‑rolled plates, strips, tubes, and bars. As the most common stainless steel material, it provides stable performance and cost efficiency across a wide range of industries.