Stainless steel


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Stainless steel

Stainless steel have traditionally been divided into types depending on their microstructure at room temperature, which gives a rough indication of their composition and properties.

Stainless steel can be divided into four main types: ferritic, martensitic and precipitation hardening, duplex, and austenitic – the best steel for you depends on the application.

Ferritic stainless steel

  • Low carbon and nickel content
  • Good corrosion resistance
  • Good weldability and toughness
  • Magnetic

Martensitic and precipitation hardening stainless steel

  • High strength
  • High wear resistance
  • Limited corrosion resistance
  • Magnetic

Duplex stainless steel

  • High strength and toughness
  • Very good corrosion resistance
  • Good weldability
  • Lightweight
  • Magnetic

Austenitic stainless steel

  • Good to excellent corrosion resistance
  • Good weldability and formability
  • Good creep resistance
  • Non-magnetic

 

Characteristics

  • Corrosion resistance
  • Resistance to oxidation and sulfidation
  • Cryogenic strength
  • Resistance to abrasion and erosion
  • Surface finish
  • Magnetic properties
  • Ductility
  • Elevated temperature strength
  • Stability of properties in service
  • Suitability for intended fabrication techniques

Grades

  • SS 304 / 304L
  • SS 310 / 310S
  • SS 316 / 316L
  • SS 317 / 317L
  • SS 321 / 321H
  • SS 347 / 347H
  • SS 446
  • Duplex 2205
  • Super Duplex 2507