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Hastelloy B2

As a nickel-molybdenum alloy, Hastelloy B2 has excellent resistance to reducing agents such as hydrogen chloride, sulfuric, acetic, and phosphoric acid. Purified sulfuric acid and other non-oxidizing acids are resistant to Hastelloy B2. The alloy should not be used in oxidising or reducing media containing oxidising contaminants. Using alloy B2 in a system containing hydrochloric acid can cause premature failure.

The resistance to a wide range of organic acids and chloride-induced stress-corrosion cracking makes it popular among industrial users.

Welded Hastelloy B2 resists grain boundary carbide precipitation in the weld heat-affected zone. To ensure uniform corrosion resistance, the heat-affected weld zones have reduced carbide and other phase precipitation. Pitting and stress corrosion cracking resistance are excellent in Alloy B2.

Chemical Analysis :

- Ni Mo Fe Cr C Si Mn
Max Bal 30.0 2.0 1.0 0.02 0.10 1.0
Min 26.0

Tensile Data :

- Ultimate Tensile Yield Strength (0.2% OS) Elong.% R/A Hardness Rockwell
Min 110 KSi 51 KSi 40
Min 760 MPa 350 MPa


  • Superior resistance to hydrochloric acid, aluminum chloride catalysts and other strongly reducing chemicals. Excellent high-temperature strength in inert and vacuum atmospheres.
  • Hastelloy B2 is a nickel-molybdenum alloy particularly suited for equipment handling reducing chemical environments.
  • Applications in the chemical process industry involving sulfuric, phosphoric, hydrochloric and acetic acid. Temperature uses vary from ambient temperature to 1500°F depending on the environments (please call for technical advice).
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