NeoNickel

Alloy B-2

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

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Characteristics of Alloy B-2

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.

  • UNS Number: UNS N10665
  • Werkstoff Number: 2.4617
  • ASTM: B333, B335, B564, B619, B622, B626, B366, B462, B775

Product availability

We stock Alloy B-2 in round bar form, available in a wide range of sizes to suit different chemical processing and corrosion-resistant applications. To view available sizes and submit an inquiry, use the dropdown selector below.

To view available sizes and submit an enquiry, use the dropdown selectors below.
Round Bar
30 Products

Chemical analysis

%NiMoCrSiCMnPSFe
MinBalance260000000
MaxBalance3010.10.30.50.040.032

Key Properties

  • Density: 9.22 g/cm³
  • Melting Range: 1332-1382°C
  • Specific Heat Capacity: 377 J/kg.°C
  • Electrical Resistivity: 1.37 µΩ.m

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-oxidising acids. The alloy should not be used in oxidising media or where oxidising 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.

Mechanical & Physical Properties

Mechanical & Physical Properties21.1°C93.3°C204.4°C315.6°C426.7°C537.8°C648.9°C
Ultimate Tensile Strength /MPa894-849823806--
0.2% Yield Strength /MPa412-350328310--
Elongation %61-596060--
Coefficient of Thermal Expansion /µm/m°C-10.310.811.211.511.7-
Thermal Conductivity /kcal/(hr.m.°C) **9.5510.4911.5212.5613.7614.8816.08
Modulus of Elasticity / GPa217--202196189-

Applications of Alloy B-2

  • Pressure vessels and reactors
  • Agitators and mixers
  • Pumps and valves
  • Gaskets
  • Pipe work and pipe spools
  • Heat exchangers
Proud members of the British Valve & Actuator AssociationProud members of the British Valve & Actuator Association