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Alloy B-2

A nickel-molybdenum grade, Alloy B-2 is extremely resistant to hydrochloric acid in a wide range of temperatures.

Alloy B-2 is a solid-solution strengthened nickel alloy which is normally used in extreme reducing conditions. Alloy B-2 also exhibits good resistance to hydrogen chloride, sulphuric acid and phosphoric acid.


Product form Size range from Size range to
Alloy B-2 round bar 12.7 mm 190.5 mm

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Chemical Analysis

% Ni Mo Cr Si C Mn P S Fe
Min Balance 26 0 0 0 0 0 0 0
Max Balance 30 1 0.1 0.3 0.5 0.04 0.03 2


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Ideal for use within the Pharmaceutical industry

Alloy B-2 can be used in a variety of applications including:

  • Pressure vessels and reactors
  • Agitators and mixers
  • Pumps and valves
  • Gaskets
  • Pipe work and pipe spools
  • Heat exchangers

About Alloy B-2

Alloy B-2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulphuric, acetic and phosphoric acids. Hastelloy® B-2 provides resistance to pure sulphuric acid and a number of non-oxidizing acids. The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if alloy B-2 is used where ferric iron, cupric ion and free chlorides are present.

With a high nickel content, Hastelloy® B-2 is immune to chloride-induced stress corrosion cracking.

Hastelloy® is the registered trademark of Haynes International.


9.22 g/cm³
Melting Range:
Specific Heat Capacity:
377 J/kg.°C
Electrical Resistivity:
1.37 µΩ.m


UNS Number:
UNS N10665
Werkstoff Number:
ASTM B333, B335, B564, B619, B622, B626, B366, B462 , B775
Download the Alloy B-2 Data Sheet Download

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