Alloy B-3 / UNS N10675
Hastelloy B3 (UNS N10675) is a strong and high-performing nickel-molybdenum alloy, is well-known for its outstanding resistance to corrosion and impressive performance in various industries, particularly in environments that promote reduction. This high-performing material is frequently used in the chemical, petrochemical, and power generation industries, where sturdiness and dependability are essential.
Alloy B3 Inventory
|Product Form||Size range from||Size range to|
Hastelloy B3 pipe
|0.5 in||8 in|
Hastelloy B3 tube
|12 mm||260 mm|
Hastelloy B3 pipe fittings
|0.5 in||8 in|
Hastelloy B3 flanges
|0.5 in||8 in|
Industries and Applications
Chemical Processing: Hastelloy B3 is widely used in equipment that comes into contact with aggressive chemicals, such as heat exchangers, reactors, and columns. Its corrosion resistance ensures the durability and reliability of these critical components.
Petrochemical Industry: In the petrochemical industry, Hastelloy B3 is frequently utilized for components exposed to highly corrosive substances, including sour gas and oil. Its resilience in these harsh conditions makes it a top choice for materials in this sector.
Power Generation: Hastelloy B3 is employed in power generation plants, where it’s used in components like waste incinerators, combustion chambers, and superheater tubing due to its excellent corrosion resistance and thermal stability.
Pollution Control: In the pollution control industry, Hastelloy B3 is used in components such as scrubbers and gas cleaning systems, ensuring reliable performance and resistance to corrosive environments.
Key Properties of Hastelloy B3
Superior Corrosion Resistance: Hastelloy B3 is highly resistant to various corrosive environments, including hydrochloric and sulfuric acids. Its unique combination of nickel and molybdenum provides outstanding resistance to both localized and general corrosion, making it a preferred choice for harsh environments.
Excellent Thermal Stability: This alloy exhibits remarkable thermal stability, withstanding temperatures up to 1500°F (816°C). Its ability to maintain its mechanical properties at high temperatures makes it ideal for applications where elevated temperatures are a factor, such as heat exchangers and reactors.
Enhanced Fabricability: Hastelloy B3 displays improved fabricability compared to its predecessor, Hastelloy B2. It can be readily formed, welded, and machined using conventional techniques, making it a versatile material for various applications.
Resistance to Hydrogen Embrittlement Unlike many other nickel alloys, Hastelloy B3 is highly resistant to hydrogen embrittlement, ensuring the material’s longevity and reliability in hydrogen-rich environments.
Fabrication and Heat Treatment
Hastelloy B3 is a versatile and highly resistant nickel-molybdenum alloy that is known for its excellent performance in a wide range of corrosive environments. This high-performance alloy is also highly sought after for its superior fabrication and heat treatment properties, making it a popular choice for a wide range of industrial applications.
Fabrication of Hastelloy B3 is relatively straightforward and can be achieved using standard fabrication techniques for nickel-based alloys. This alloy is both formable and weldable, making it a versatile option for a wide range of applications. Cold working is possible with Hastelloy B3, although intermediate annealing may be necessary to avoid work hardening. Forging should be performed at a temperature between 1750°F and 2050°F, followed by rapid cooling.
Heat treatment of Hastelloy B3 is also relatively straightforward, with annealing performed at a temperature range between 2020°F and 2150°F, followed by a rapid quench. Cooling at an accelerated rate is important to avoid the formation of detrimental phases that may form between 400°F and 1800°F. Welding can be performed using gas tungsten-arc, gas metal-arc, and shielded metal-arc processes.
Applicable Specifications of Hastelloy B3
Alloy B3 Sheet & Plate
Alloy B3 Bar
Alloy B3 Pipe & Tube
|B622, B619||SB 622, SB 619||N10665|
Alloy B3 Weld Wire
Alloy B3 Fitting
Alloy B3 Forging
Alloy B3 Castings
Common Trade Names
HASTELLOY B-3® is a trademark owned by of Haynes International Inc.
(in annealed condition)
|Tensile strength:||690 MPa|
|Yield strength:||345 MPa|
Chemical Composition (%)
|Molybdenum||2.5 – 3.5%|
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