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Hastelloy® Alloy B2

Hastelloy® Alloy B2 is a solid solution strengthened, nickel-molybdenum alloy, with significant resistance to reducing environments like hydrogen chloride gas, and sulfuric, acetic and phosphoric acids. Molybdenum is the primary alloying element which provides significant corrosion resistance to reducing environments. This nickel steel alloy (Hastelloy® Alloy B2) can be used in the as-welded condition because it resists the formation of grain-boundary carbide precipitates in the weld heat-affected zone.


Standard Hastelloy® Alloy B2
1 UNS N10665
2 Werkstoff Nr. 2.4617

Chemical Composition

Hastelloy® Alloy B2
Ni Bal
Mo 26 – 30
Fe 2.0 max
C 0.02 max
Co 1.0 max
Cr 1.0 max
Mn 1.0 max
Si 0.1 max
P 0.04 max
S 0.03 max

Mechanical & Physical Properties

Density 9.2 g/cm3
Melting Point 1370 °C (2500 ºF )
Tensile Strength Psi – 1,10,000 , MPa – 760
Yield Strength (0.2%Offset) Psi – 51000 , MPa – 350
Elongation 40 %

Hastelloy® is a registered trademark of the Haynes International.