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Hastelloy B2 Seamless Nickel Alloy Steel Pipe

Hastelloy B2 Seamless Nickel Alloy Steel Pipe is a high-performance nickel-molybdenum alloy tube designed to resist strong reducing agents such as hydrochloric acid and other aggressive chemical environments. Ideal for use in industries like chemical processing, power generation, marine, and pharmaceuticals, these tubes offer outstanding corrosion resistance, mechanical strength, and thermal stability.
① STANDARD: ASTM B622/ASME SB622 for seamless , ASTM B619 for welded ...

② OD RANGE : 6-457 MM

③ THICKNESS RANGE: 1-45 MM

UNS N10665/2.4617/Hastelloy B2 Chemical Composition

Grade

Ni

Cr

Mo

Fe

C

Si

Co

Mn

P

S

UNS N10665

Balance

≤1.00

26.00-30.00

≤2.00

≤0.02

≤0.10

≤1.00

≤1.00

0.040

0.030

UNS N10665/2.4617/Hastelloy B2 Mechanical Properties

Grade

Tensile Strength ksi(MPa)

Yield Strength ksi(MPa)

Elongation (%)

UNS N10665

≥110(760)

≥51(350)

≥40

the ASTM B622 Nickel alloy seamless tube and pipe tolerance

UNS N10665/2.4617/Hastelloy B2 Applications


Hastelloy B2, also known as UNS N10665, is a nickel-molybdenum alloy with high levels of chromium and molybdenum. Its exceptional properties make it suitable for various industrial applications. Let’s explore how it is used in different industries:

  1. Chemical Processing:
    • Hastelloy B2 is widely employed in chemical processing equipment due to its excellent corrosion resistance against a wide range of organic and inorganic acids.
    • It finds applications in reactors, heat exchangers, and other components exposed to aggressive chemical environments.
  2. Oil and Gas Industry:
    • In the oil and gas sector, Hastelloy B2 is used in sweetening units, sour gas wells, and offshore platforms where corrosion resistance is essential.
    • Its ability to withstand harsh conditions makes it valuable in these applications.
  3. Pharmaceutical Industry:
    • Hastelloy B2 is employed in pharmaceutical equipment due to its corrosion resistance and formability.
    • It ensures product purity and safety in critical processes.
  4. Power Generation:
    • The alloy is used in power plants for components like de-aerating heaters.
    • Its good oxidation resistance at high temperatures contributes to efficient operation.
  5. Marine Engineering:
    • In marine applications, Hastelloy B2 is suitable for marine fixtures, bimetal contacts, and gasoline and freshwater tanks.
    • Its corrosion resistance ensures longevity in saltwater environments.

Remember that Hastelloy B2’s versatility and superior properties make it an ideal choice for demanding environments across various industries.


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UNS N10665/2.4617/Hastelloy B2 Material Summary

Alloy B2 Pipes and Tubes is a solid solution strengthened, nickel-molybdenum alloy, typically used in extreme reducing conditions. UNS N10665 Pipes and Tubes has significantly lower carbon, silicon and iron compared to its’ predecessor, Alloy B (UNS N10001), making the alloy less susceptible to decreased corrosion resistance in the weld zone, in the as-welded condition.

Alloy B2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulphuric, acetic and phosphoric acids. Hastelloy B2 provides resistance to pure sulphuric acid and a number of non-oxidizing acids. The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if alloy B2 is used where ferric iron, cupric ion and free chlorides are present.

With a high nickel content, Hastelloy B2 is immune to chloride-induced stress corrosion cracking.

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