Mainly contains chromium (16–26%) and nickel (6–22%). Common grades include 304 and 316.

Strong corrosion resistance, non-magnetic, good toughness, easy to process, and excellent welding performance.

• Food Processing & Kitchenware: Austenitic stainless steel (e.g., 1.4310CSPFH, SUS301) is widely used in food processing equipment, kitchenware and tableware.
• Chemical & Energy Equipment: Used in reaction vessels, pipelines, storage tanks, valves and pump shafts.
• Architecture & Decoration: Used for exterior walls, railings, roofs, etc.
• Transportation — Automobile: SUS301 is used for body structure components and exhaust pipes.
• Transportation — Aerospace: Used for engine parts and fasteners, meeting requirements for high strength and high-temperature resistance.

Contains chromium (12–18%) and carbon (0.1–1.2%). Common grades include 410 and 420.

Strength and hardness can be enhanced through heat treatment, good wear resistance, but relatively weak corrosion resistance, and magnetic.

• Medical Devices & Surgical Instruments: Scissors, forceps, surgical knives, etc.
• Industrial Cutting Tools & Mechanical Components: Food processing tools, offering superior corrosion resistance.
• Aerospace & Defense: Used for missile casings, engine parts, etc.

Contains chromium (10.5–30%), low carbon content. Common grades include 430 and 446.

Excellent corrosion resistance, especially against stress corrosion; magnetic; medium strength; average welding performance.

• Automobile Industry — Exhaust Systems: Exhaust pipes, mufflers, etc.
• Appliances & Kitchenware: Refrigerator door handles, microwave oven shells, etc.
• Commercial Installation — Chemical Containers: Used for corrosion-resistant linings or pipelines.

Contains chromium (18–28%), nickel (4.5–8%), and molybdenum (2.5–4%). Common grades include 2205 and 2507.

Combines the advantages of austenite and ferrite: high strength, excellent corrosion resistance, and strong resistance to stress corrosion and pitting corrosion.

• Petroleum & Natural Gas — Subsea Pipelines: Used for subsea pipelines, valves, and pump bodies.
• Chemical & Environmental Protection — Reactors & Heat Exchangers: Outstanding resistance to local corrosion.
• Ocean Engineering — Vessels & Propellers: Resistant to seawater corrosion.
• Architecture & Energy — Nuclear Power: Used in cooling systems, resistant to high-temperature oxidation and stress corrosion.