General Description

Hastelloy B2 is nickel-molybdenum alloy with lower carbon compared with Hastelloy B, which exhibits superior resistance to hydrochloric acid, aluminum chloride catalysts, and other strongly reducing chemicals.

Hastelloy B2 is suitable for most chemical process applications in the as-welded condition. Well suited for equipment handling hydrochloric acid in all concentrations and temperatures. Resistant to hydrogen chloride gas and sulfuric, acetic, and phosphoric acids. Principal high-temperature uses are those in which a low coefficient of thermal expansion is required.

Exposure to temperatures of 540 to 815 °C (1000–1500 °F) should be avoided because of a reduction in the ductility of the alloy. In oxidizing gases such as air, Hastelloy B2 produced by NiWire can be used at temperatures up to 540 °C (1000 °F). In reducing gases or in vacuum, the alloy can be used from 815 °C (1500 °F) to substantially higher temperatures. Ferric or cupric salts might develop when hydrochloric acid comes in contact with iron or copper, so Hastelloy B2 should not be used with copper or iron piping in a system containing hydrochloric acid.

Chemical Composition

Grade Ni% Cr% Mo% Fe% C% Mn% Si% Co% S% P%
Hastelloy B2 Bal. Max 1.0 26.0-30.0 Max 2.0 Max 0.02 Max 1.0 Max 0.10 Max 1.0 Max 0.03 Max 0.04


Grade UNS Werkstoff Nr.
Hastelloy B2 N10665 2.4617

Physical Properties

Grade Density Melting Point
Hastelloy B2 9.2 g/cm3 1330°C-1380°C

Mechanical Properties

Hastelloy B2 Tensile Strength Yield Strength RP0.2% Elongation
Solution Treatment 745 MPa 325 MPa 40%

Our Production Standard

  Bar Forging Parts Welded Tube Seamless Tube Sheet/Plate Wire

Size Range

Hastelloy B2 bar, rod, forging, plate, sheet, tube and other standard forms are available.

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