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Hastelloy B2

Designated as UNS N10665 or W.Nr. 2.4617, Hastelloy B2 (also known as “Alloy B2”), is a solid solution strengthened nickel-molybdenum alloy with low addition of carbon, silicon & iron. It has good resistance to hydrogen chloride, sulfuric acid and phosphoric acids and has excellent resistance to stress corrosion cracking and pitting corrosion at elevated temperatures. The significantly low carbon content makes Hastelloy B2 less susceptible to decreased corrosion resistance in the weld zone, in the as-welded condition. It can be used in reducing chemical environments and chemical processing industry. However, Hastelloy B2 should not be used at temperatures between 1000°F and 1600°F nor be used in oxidizing media.

Hastelloy B2 fittings for a pressure vessel.

Hastelloy B2 fittings for a pressure vessel.

1. Chemical Composition Requirements

The Chemical Composition of Hastelloy B2, %
NiBalance
Mo26.0-30.0
Fe≤2.00
C≤0.02
Co≤1.00
Cr≤1.00
Mn≤1.00
Si≤0.10
P≤0.040
S≤0.030

2. Typical Physical Properties

PropertiesValue
Density Room Temp.0.333lb/in3
Melting Range2430°F to 2520°F
Specific Heat 68°F0.090Btu/lb. °F
Elastic Modulus 68°F31.4*106psi
Thermal Conductivity 68°F64Btu/ft.h.°F

3. Product Forms and Standards of Hastelloy B2

Product FormStandard
BarASTM B335, B564
Sheet & PlateASTM B333, A480
Welded PipeASTM B619, B775
Seamless Pipe & TubeASTM B622
Welded TubeASTM B626
*The mechanical properties of Hastelloy B2 vary in different forms or heat treatment conditions.

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    Hebei Metals Industrial Limited
    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
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