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Hastelloy B Alloy UNS N10001: Properties and Applications
Introduction to Hastelloy B Alloy
Hastelloy B alloy, also known as UNS N10001, is a nickel-molybdenum-based superalloy renowned for its exceptional resistance to hydrochloric acid and other reducing environments. Developed by Haynes International, this alloy is widely used in industries where corrosion resistance is critical.
Chemical Composition
The primary components of 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 remarkable properties:
- Excellent resistance to hydrochloric acid at all concentrations and temperatures
- Good resistance to sulfuric, phosphoric, and acetic acids
- High strength and durability in extreme environments
- Good fabricability and weldability
- Resistance to stress-corrosion cracking
Applications
Due to its unique properties, Hastelloy B alloy finds applications in various industries:
- Chemical processing equipment
- Hydrochloric acid production and handling
- Pulp and paper industry
- Pharmaceutical manufacturing
- Pollution control systems
- Heat exchangers and reactors
Limitations
While Hastelloy B alloy offers excellent performance in reducing environments, it has some limitations:
- Limited resistance to oxidizing environments
- Susceptibility to intergranular corrosion in certain conditions
- Not recommended for use in nitric acid or other strongly oxidizing media
Keyword: HastelloyB UNS N10001
Conclusion
Hastelloy B alloy (UNS N10001) remains a critical material for industries dealing with highly corrosive environments, particularly those involving hydrochloric acid. Its unique combination of properties makes it indispensable for many chemical processing applications where other materials would fail.
