chemprocessing 3Hastelloy C2000 flanges combine the outstanding resistance to oxidizing media of C276 with superior resistance to non-oxidizing environments, making it a unique alloy for protecting chemical process equipment across a wide range of conditions including streams contaminated with ferric ions. It was designed to offer greater versatility compared to the other Hastelloy alloys. This was accomplished by increasing the chromium and molybdenum content in addition to adding a small, but effective addition of copper (1.6%). The addition of copper provides C2000 flanges enhanced temperature capability in sulfuric acid, hydrofluoric acid, and dilute hydrochloric acid.

Corrosion Performance 

Key Benefits

  • Excellent resistance to all acids (especially hydrochloric, sulfuric, and hydrofluoric) over large temperature ranges
  • Excellent protection from chlorides and other halide solutions, specifically pitting, crevice attack, and stress corrosion cracking
  • Excellent resistance to stress corrosion cracking and superior resistance to localized corrosion compared to C-276


  • Chemical process industry reactors, heat exchangers, columns, and piping
  • Pharmaceutical industry reactors and dryers
  • Flue gas desulfurization systems

Resources: Hastelloy Torque SpecFlange DimensionsFlange Bolting Chart

Hastelloy Fastener Types: Bolts, Nuts, ScrewsStudsThreaded Rods, Washers

Flange Types Available: Blind FlangesLap Joint FlangesSlip On FlangesSocket Weld FlangesThreaded FlangesWeld Neck Flanges


 Hastelloy C2000 Fastener & Flange Grades & Chemistry

C2000 alloy, UNS N06200, is a corrosion resistant alloy with excellent resistance to uniform corrosion in oxidizing or re-ducing environments. Due to the addition of copper and the high content of chromium, it has enhanced corrosion resistance to sulfuric acid and process streams contaminated with ferric ions. In addition it has excellent resistance to stress corrosion cracking and superior resistance to localized corrosion as compared to C-276 alloy. This alloy has limited availability and can be made into  sizes only 1/2" and greater is size for fasteners. 

Hastelloy C2000 Specifications: SB 575/B 575, SB 574/B 574, SB 366/B 366 SB 462/B 462,SB 564/B 564 SB 462/B 462, NACE MR0175 ISO 15156, Werkstoff 2.4675

Hastelloy C2000 Chemistry 


C2000 Tensile Data

 Hastelloy C2000 Sulfuric Acid Corrosion Performance

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Hastelloy C2000 Hydrochloric Acid Corrosion Performance

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Hastelloy C2000 Nitric Acid Corrosion Performance

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Hastelloy C2000 Hydrobromic Acid Corrosion Performance

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