JIS G4304 / G4312 SUS 304L Stainless Steel Composition & Low‑Carbon Austenitic Properties
SUS 304L is the low‑carbon variant of SUS 304 stainless steel defined in JIS G4304 / G4312. With 18–20% chromium, 8–12% nickel, and carbon ≤0.03%, it minimizes carbide precipitation during welding and improves intergranular corrosion resistance.
304L performs reliably in atmospheric conditions, fresh water, food‑grade media, and mildly corrosive environments. It is widely used in pressure vessels, storage tanks, piping systems, food‑processing equipment, and architectural components. SUS 304L is supplied as cold‑rolled sheets, hot‑rolled plates, strips, tubes, and bars. As a weld‑optimized version of 304, it provides enhanced reliability in welded structures across chemical, food, construction, and mechanical industries.
304L performs reliably in atmospheric conditions, fresh water, food‑grade media, and mildly corrosive environments. It is widely used in pressure vessels, storage tanks, piping systems, food‑processing equipment, and architectural components. SUS 304L is supplied as cold‑rolled sheets, hot‑rolled plates, strips, tubes, and bars. As a weld‑optimized version of 304, it provides enhanced reliability in welded structures across chemical, food, construction, and mechanical industries.