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Hastelloy B Alloy UNS N10001: Properties and Applications

Introduction to Hastelloy B Alloy

Hastelloy B, also known as UNS N10001, is a nickel-molybdenum alloy renowned for its exceptional resistance to hydrochloric acid and other reducing environments. Developed by Haynes International, this alloy is widely used in chemical processing, petrochemical, and other industries where corrosion resistance is critical.

Chemical Composition

The primary elements in Hastelloy B alloy include:

• Nickel (Ni): ~65%
• Molybdenum (Mo): ~28%
• Iron (Fe): ~5%
• Chromium (Cr): ~1%
• Other trace elements

Key Properties

Hastelloy B alloy exhibits several notable properties:

• Corrosion Resistance: Excellent resistance to hydrochloric acid, sulfuric acid, and other reducing chemicals.
• High Temperature Stability: Maintains strength and integrity at elevated temperatures.
• Mechanical Strength: Good tensile and yield strength in harsh environments.
• Fabrication Ease: Can be welded and machined with standard techniques.

Applications

Due to its unique properties, Hastelloy B alloy is used in various industries, including:

• Chemical Processing: Reactors, heat exchangers, and piping systems.
• Petrochemical: Equipment exposed to corrosive gases and liquids.
• Pharmaceutical: Components requiring high purity and resistance to aggressive chemicals.
• Waste Treatment: Systems handling acidic waste streams.

Conclusion

Hastelloy B (UNS N10001) is a versatile alloy with outstanding corrosion resistance, making it ideal for demanding industrial applications. Its ability to withstand harsh chemical environments ensures long-term reliability and performance in critical systems.