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They are a very popular ferritic austentic stainless steel grade alloy bolts which are the preferred material for a number of industrial applications. The upgraded version of UNS S31803 is the Duplex 2205, which offers higher resistance to corrosion. The Duplex Stainless Steel UNS S32205 Stud Bolts is used extensively in applications where high resistance and strength are required. They have higher molybdenum content as compared to the previous version which results in a “par excellence” resistance to stress corrosion cracking, crevice, pitting, erosion.


These ferritic austentic stainless steel grade alloys have other metals in different compositions which help in exhibiting these superior properties. The presence of nitrogen provides good oxidation resistance at high temperatures. Chromium, molybdenum content also provides high resistance even in oxidizing and acidic solutions and in chloride rich atmosphere. The presence of ferrite provides good performance in caustic environments.


These much sort after properties can further be enhanced by coating it like:

  • Hot Dipped Galvanizing
  • Epoxy Coating
  • Electro Polished

They are extensively used in bio fuel plants, food processing equipments, pulp and paper industry digesters, bleaching and stock handling equipments.

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