254 SMO

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Alloy 254 SMo Tubes
Alloy 254 SMo Seamless Tubes
Alloy 254SMo Plates
Alloy 254 SMo Sheets
Alloy 254 SMo Pipes/ 254 smo pipe
Alloy 254 SMo Fittings


Alloy 254 SMO

254 SMO is a high-alloy austenitic stainless steel developed for use in seawater and other aggressive chloride-bearing media.

The steel is characterized by the following properties:
  • Good weldability
  • Excellent resistance to pitting and crevice corrosion
  • High resistance to general corrosion
  • High resistance to stress corrosion cracking
  • Higher strength than conventional austenitic stainless steels

Standards

  • UNS S31254
  • EN number 1.4547
  • EN name X1CrNiMoCuN20-18-7
  • W.Nr. 1.4529**
  • SS 2378*
  • AFNOR Z1 CNDU 20.18.06AZ*

* Obsolete. Replaced by EN.
** Nearest equivalent grade.

Product standards

  • Seamless tube and pipe: ASTM A269, A213, A312, NFA 49-217, EN 10216-5
  • Welded tube and pipe: ASTM A249, A269 , A312, A358, A409
  • Fittings: ASTM A182
  • Bar: ASTM A276, A479, EN 10088-3
  • Forged products: ASTM A473

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