COSMIC 33 corrosion resistant alloy

Stainless Steel

COSMIC 33 is an austenitic heat and corrosion resistant alloy offering an exceptional combination of strength and resistance to carburetion, oxidation, and thermal shock. Carburization and oxidation resistance to 2200° F are enhanced by a nominal 1.25% silicon addition. COSMIC 33 finds wide application in high temperature industrial environments where good resistance to the combined effects of carburization and thermal cycling is prime requisite. COSMIC 33 remains fully austenitic at all temperatures and is not subject to embrittlement from sigma formation.


Chemical Properties may vary according to mill mix

Carbon .08 MAX
Manganese 2.0 MAX
Phosphorus .030 MAX
Sulfur .030 MAX
Silicon 1.00 – 1.50
Nickel 34.0 – 37.9
Chromium 17.0 – 20.0
Iron Balance
Copper 1.00 MAX


  • Oxidation resistance to 2200° F
  • Resistant to carburization and nitriding
  • Resistant to thermal shock
  • Good strength at elevated temperatures
  • Metallurgical stability
  • Chloride ion stress corrosion cracking resistance


  • Furnace Container
  • Muffles
  • Retorts
  • Quenching fixtures
  • Bar frame heat treating baskets
  • Heat exchangers
  • Radiant tubes
  • Salt Pots
  • Furnace Fans Shafts
  • Petrochemical Furnace components
  • Hot pressing platens

Cutting; Air Arc, Plasma Arc, Caldo Mini Torch
Welding rod cap; 2134

Please contact us for more information on our Shock and Wear Fabrication Plate. The Stallion Wear Plate.