Comprehensive List of Stainless Steel Grades

Stainless steel grades are categorized and specified according to their chemical composition and microstructure. Below is a comprehensive list of common stainless steel grades often referenced in industrial applications:

• 301 Stainless Steel: Known for its good formability and weldability.
• 302HQ Stainless Steel: A variation of 302 with improved mechanical properties.
• 303 Stainless Steel: Free-machining grade with the addition of sulfur.
• 304 Stainless Steel: The most common austenitic grade, widely used for its corrosion resistance.
• 304L Stainless Steel: Lower carbon version of 304, used for its enhanced weldability.
• 304H Stainless Steel: A higher carbon content version of 304, used for higher temperature applications.
• 305 Stainless Steel: Similar to 304 but with improved high-temperature performance.
• 309S Stainless Steel: Higher carbon and silicon content, used for its resistance to scaling at elevated temperatures.
• 310S Stainless Steel: Excellent high-temperature performance and oxidation resistance.
• 316 Stainless Steel: Improved corrosion resistance due to the addition of molybdenum.
• 316L Stainless Steel: Lower carbon version of 316, for better intergranular corrosion resistance.
• 316Ti Stainless Steel: Contains titanium for better stability and creep strength.
• 317L Stainless Steel: Higher molybdenum and nitrogen content, for enhanced pitting and crevice corrosion resistance.
• 321 Stainless Steel: Contains titanium for better intergranular corrosion resistance.
• 347 Stainless Steel: Similar to 321 but with columbium for better stability.
• 400 Series Stainless Steel: A family of ferritic and martensitic grades known for their magnetic properties.
• 405 Stainless Steel: A ferritic grade used for its heat resistance.
• 409 Stainless Steel: A ferritic grade commonly used in automotive exhaust systems.
• 410 Stainless Steel: A martensitic grade known for its hardenability.
• 414 Stainless Steel: A free-machining martensitic grade.
• 416 Stainless Steel: A martensitic grade with good corrosion resistance and machinability.
• 420 Stainless Steel: A high-carbon martensitic grade used for cutlery and other tools.
• 430 Stainless Steel: A ferritic grade with good formability and corrosion resistance.
• 434 Stainless Steel: A free-machining ferritic grade.
• 440 Series Stainless Steel: A family of high-carbon martensitic grades used for cutlery and other hard wear parts.
• 446 Stainless Steel: A super ferritic grade with excellent corrosion resistance.
• 201 Stainless Steel: A lower-cost alternative to 304 with lower corrosion resistance.
• 202 Stainless Steel: Offers better corrosion resistance than 201.
• 2507 Super Duplex Stainless Steel: A super duplex grade with high strength and corrosion resistance.
• 2205 Duplex Stainless Steel: A duplex grade (a mix of austenitic and ferritic) with good corrosion resistance.
• 2304 Stainless Steel: A duplex grade with good formability and resistance to stress corrosion cracking.
• S32100 Stainless Steel: A martensitic precipitation-hardening grade.
• S32304 Stainless Steel: A duplex grade with good corrosion resistance.
• S32750 Stainless Steel: A super duplex grade with high corrosion resistance.
• S32760 Stainless Steel: A high-alloyed super duplex grade for demanding environments.
• S31254 Stainless Steel: A super duplex grade with excellent corrosion resistance.
• S31803 Stainless Steel: A 22% chromium, 5% nickel, nitrogen-alloyed duplex stainless steel.

This list includes a range of stainless steel grades that are commonly used across various industries. Each grade has specific properties that make it suitable for different applications, from general use to specialized environments.

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