Alloy 254 SMO Weldability

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254 SMO® is a stainless steel was initially created to utilize in seawater and other aggressive chloride-bearing situations. This grade includes a very high end austenitic stainless steel; mainly comprised within 17.5% to 18.5% nickel, 19.5% and 20.5% chromium, 6% to 6.5% molybdenum and .18% to .22% nitrogen. These particular levels of Cr, Ni, Mo, and N in this “super austenitic” chemical makeup allow 31254 to join impact toughness resistance to corrosion cracking, with pitting and crevice corrosion resistance. The result is strength of almost double that of 300 series stainless steels.

UNS S31254 is treated as a “6% Moly” grade because of the molybdenum content; the 6% Moly family has the ability to withstand high temperatures and keep up strength under volatile conditions. This grade has surpassed its unique expectation and covered into many different industries demonstrating helpfulness owing to its high level of molybdenum amount other elements, which allows Alloy 254 SMO to be utilized effectively as a part of different applications such as flue gas desulfurization and chemical environments.

Applications
  • Petroleum production
  • Saltwater handling
  • Food and chemical processing equipment
  • Pulp mill bleach systems
  • Flue gas desulphurization scrubbers
  • Tall oil distillation columns
  • Offshore oil & gas production equipment
  • Desalination equipment


Chemical Composition %

GradeCN SiP S Cr MnNiCuMo
Alloy 254 SMO 0.02 max 0.18 - 0.22 0.8 max 0.03 max 0.01 max 19.5 - 20.5 1.0 max 17.5 - 18.50.5 - 1.06.0 - 6.5
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