Skip to Content

MECHANICAL PROPERTIES, CHEMISTRY OF VARIOUS TYPES OF STAINLESS STEEL

Austenite

301: 17Cr - 7Ni / 301L: 17Cr - 7Ni - LC It has lower Cr and Ni content compared to 304 and can achieve high strength due to additional cooling processes. It is primarily used for springs and the internal and external panels of ships.

304: 18Cr - 8Ni It is the most widely used type of steel, known for its good corrosion resistance, heat resistance, and mechanical properties, and is used for household appliances, construction materials, and kitchen utensils, etc.

304L: 18Cr - 9Ni - LC Due to its lower carbon content compared to 304, it has excellent grain boundary corrosion resistance and is used for industrial equipment, chemical equipment, and LNG storage tanks, etc.

304J1: 17Cr - 8Ni - 2Cu It has high formability due to the added Cu content and is used for deep drawing materials, such as kitchen sinks and glass containers, etc.

316: 18Cr - 12Ni - 2Mo It has high corrosion resistance and pitting resistance due to increased Mo and Ni content, along with excellent high-temperature strength, making it widely used for water pipes, chemical production equipment, and coastal facilities, etc.

316L: 18Cr - 12Ni - 2Mo - LC 316L has excellent grain boundary corrosion resistance due to its lower carbon content compared to 316 and is used in environments with many corrosive elements, such as salinity and toxic gases, etc.

316LN: 18Cr - 11Ni - 2Mo - 0.13N (Plate) It is a type of steel with enhanced strength by adding nitrogen to 316L steel, used for chemical equipment and storage tanks, etc.

321: 18Cr - 9Ni - 0.3Ti It is a type of steel with intergranular corrosion resistance enhanced by adding Ti to 304 steel, used for heat exchangers and boiler covers, etc.

XM15J1: 19Cr - 13Ni - 3.5Si (Cold Rolled) It is a type of steel with high resistance to corrosion in saline environments and high oxidation resistance, used for components in automobiles, ships, machinery, heaters, and burners, etc.

310S: 22Cr - 20Ni It is a type of steel with high oxidation resistance at high temperatures and high thermal strength by increasing Cr and Ni content, used for applications requiring heat resistance, such as ships, machinery, and heat exchangers, etc.

Ferrite

  • 430: 16Cr - 0.05C
  • It is a representative Ferritic stainless steel, known for its good formability and oxidation resistance, and is used for various purposes and applications, such as kitchen utensils, Western tableware, interior and exterior materials for construction, etc.
  • 409L: 11Cr - 0.2Ti - LCN
  • It has good weldability and formability due to the added Ti content and is primarily used for automobiles, ships, machinery, heat exchangers, and heat-resistant equipment, etc.
  • 410L: 12Cr - LCN
  • This type of steel has weldability, and the ductility of the weld and formability are enhanced by reducing the C content in 410 steel, and it is used for structural materials for containers and internal or external materials.
  • 429EM: 14Cr - 1Si - 0.2Ti - LC
  • It has high-temperature strength and oxidation resistance as well as formability by adding elements such as Si, Ti, Mn, and Cu, etc. In addition to reducing C and N content, it is used for components in automobiles, ships, machinery, and various heat-resistant equipment.
  • 430J1L: 19Cr - 0.5Cu - 0.4Nb - LCN
  • It has corrosion resistance, formability, weldability, and high-temperature resistance due to the added Cu and Nb content in 430 steel, thus it is used for washing machines, kitchen utensils, household appliances, and heat-resistant equipment, etc.
  • 436L: 18Cr - 1Mo - 0.3Ti - LCN
  • Since Mo, Ti, and Nb are added to the steel, it has high corrosion resistance, strength, and weldability, and is used for automatic discharge parts and household electrical appliances.
  • 439: 18Cr - 0.4Ti - LCN
  • Due to the added Ti content, it has high corrosion resistance, workability, and weldability, and is widely used for automatic discharge parts and decorative pipes.
  • 444: 19Cr - 2Mo - 0.3Nb - LCN
  • This type of steel is enriched with high Cr and Mo content, providing excellent corrosion resistance and SCC resistance, and is used for tanks and water heaters, etc.
  • 445NF: 21Cr - 0.3Ti - 0.4Cu - Si, Nb
  • As a high Cr stainless steel, it has excellent corrosion resistance and is used for various purposes and applications, such as elevators, Western tableware, construction materials, and exterior materials, etc.
  • 446M: 26Cr - 2Mo - 0.3 (Ti, Nb) - LCN (Cold Rolled)
  • This type of steel has high Cr and Mo content, providing high corrosion resistance and is primarily used for exterior construction materials and roofing in coastal areas.


Martensite

  • 410: 13Cr - 0.04C
  • It is a representative type of Martensitic stainless steel. It has high strength and toughness through heat treatment.
  • 410B: 12Cr - 0.4Ni
  • The appropriate hardening cooling level can be ensured by adjusting the Mn and Ni content compared to 410 steel, and it is used for motorcycles and automatic discs, etc.
  • 420N1: 13Cr - 0.1C - 0.1N
  • It is a unique type of steel with improved corrosion resistance and strength compared to 420J1 and is used for Western cutlery (knives).
  • 420J2: 13Cr - 0.3C
  • It is a high-hardness steel that hardens compared to 420J1, and it is used for parts of machinery that require wear resistance.

Duplex

  • 329LD: 20Cr - 2.5Ni - 1.4Mo - N
  • It is a type of Ni and Mo-saving steel (Lean Duplex), which has high corrosion resistance, intergranular corrosion resistance, and is used for applications such as water pipes, seawater equipment, and chemicals, etc.
  • 329J3L: 22Cr - 5Ni - 3Mo - 0.15N
  • It contains components that enhance corrosion resistance, such as Cr, Mo, and N, etc., and has high resistance to corrosion from salinity, SCC, pitting corrosion, crevice corrosion, abrasion, and erosion, etc. Therefore, it is mainly used for applications such as desalination equipment, chemicals, and food processing.