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Product Overview
Introduction To Hastelloy B‑2 / Alloy B‑2 / UNS N10665
MOKSH TUBES & FITTINGS LLP is a renowned manufacturer, supplier, exporter, importer, and stockist of HASTELLOY B2 Products. Including pipes & tubes, fittings, flanges, sheets, plates, bars, wires, welding rods, wire mesh, and custom-engineered components. Leveraging our deep expertise in nickel-molybdenum alloys and a robust sourcing network, we deliver high-performance B‑2 solutions tailored to your industrial needs.
HASTELLOY B2 is a nickel alloy specifically formulated for superior resistance to reducing acids—including hydrochloric, sulfuric, acetic, and phosphoric—especially valuable where oxidizing alloys fail under welded conditions. Its low chromium, carbon, and silicon content ensures minimal carbide formation during welding, maintaining alloy integrity in corrosive and high-temperature environments.
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Hastelloy B-2 – Specifications (UNS N10665)
| Category | Details |
|---|---|
| Grade | Hastelloy B-2 / Alloy B-2 / UNS N10665 |
| Material Type | Nickel–Molybdenum Alloy |
| Key Characteristics | Excellent resistance to reducing acids, high purity, superior weldability |
| Chemical Summary | Ni ~65%, Mo 26–30%, Fe ~2%, Cr ~1% |
| Operating Conditions | Ideal for strong reducing media |
| Conditions Available | Annealed, Solution Annealed, Hot Rolled, Cold Worked |
| Heat Treatment | Solution Anneal at 1065–1120°C |
| Weldability | Excellent — low carbide formation |
| Testing Offered | PMI, Chemical Analysis, Hardness, Tensile, NDT |
| Certification | EN 10204 3.1 / 3.2 |
| Applicable Standards | ASTM B333, B619, B622, B626 |
Chemical Composition of Hastelloy B-2
| Element | Composition (% by Weight) |
|---|---|
| Nickel (Ni) | ~65 (Balance) |
| Molybdenum (Mo) | 26 – 30 |
| Iron (Fe) | 2.0 |
| Chromium (Cr) | 1.0 |
| Cobalt (Co) | 1.0 |
| Manganese (Mn) | 1.0 |
| Silicon (Si) | 0.10 |
| Carbon (C) | 0.02 |
| Phosphorus (P) | 0.04 |
| Sulfur (S) | 0.03 |
High molybdenum content provides outstanding resistance to strong reducing acids.
Physical Properties of Hastelloy B-2
| Property | Value |
|---|---|
| Density | 9.24 g/cm³ |
| Melting Point | 1370 °C (2500 °F) |
| Tensile Strength | 760 MPa / 110,000 psi |
| Yield Strength (0.2%) | 355 MPa / 52,000 psi |
| Elongation | 40% |
Heat Treatment of Hastelloy B-2
| Process | Temperature Range | Cooling Method |
|---|---|---|
| Solution Annealing | 1065 – 1120 °C | Rapid air or water quench |
| Stress Relieving | 870 – 900 °C | Air cool |
| Hot Working | 900 – 1200 °C | Finish above 950 °C |
| Cold Working | — | Annealing recommended |
| Post-Weld Heat Treatment | Optional | Improves corrosion resistance |
⚠ Rapid cooling prevents carbide precipitation. Hastelloy B-2 must not be exposed to oxidizing environments.
Mechanical Properties of Hastelloy B-2
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 760 MPa | 110,000 psi |
| Yield Strength (0.2%) | 355 MPa | 52,000 psi |
| Elastic Modulus (RT) | 210 GPa | 30,000 ksi |
| Elongation (50.8 mm) | 40% | 40% |
| Hardness (Rockwell B) | 88 | 88 |
International Standards & Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | N10665 |
| W.Nr | 2.4617 |
| ASTM | B333, B619, B622, B626 |
| ASME | SB333, SB619, SB622, SB626 |
Products in Hastelloy B2
MOKSH TUBES & FITTINGS LLP offers Hastelloy B‑2 in a comprehensive range of forms and product types:
✔
Seamless Pipes
✔
Welded Pipes (ERW & EFW)
✔
Tubes (Capillary, U-Bend)
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Sheets & Plates
✔
Coils & Strips
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Round Bars, Flat Bars, Hex Bars, Square Bars
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Pipe Fittings (Elbows, Tees, Reducers, Caps, Stub Ends)
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Flanges (Weld Neck, Slip-On, Blind, Socket Weld, Threaded)
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Fasteners (Bolts, Nuts, Screws, Washers, Studs)
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Custom Fabricated Components
We offer Hastelloy B2 in a wide range of product forms, including:
Uses and Advantages
Maintains integrity and strength at moderate to elevated temperatures
Exceptional resistance to reducing acids (HCl, H₂SO₄)
Ideal for welded fabrication—minimizes sensitization and corrosion
Excellent ductility and weldability
Reliable in acid handling equipment, corrosion-resistant tanks, piping, and heat exchangers
Applications of Hastelloy B2
HASTELLOY B-2 is a nickel-molybdenum alloy known for its excellent resistance to strong reducing environments, particularly hydrochloric acid in a wide range of concentrations and temperatures. It also resists stress corrosion cracking, pitting, and crevice attack, making it a dependable material for tough chemical processing conditions.
Chemical Processing Industry
Commonly used in reactors, heat exchangers, distillation columns, and piping systems handling hydrochloric, sulfuric, acetic, and phosphoric acids under reducing conditions.
Pickling and Acid Regeneration Equipment
Ideal for use in pickling lines, acid tanks, and regeneration units where strong acids are used to clean and treat metal surfaces.
Agrochemical & Fertilizer Production
Deployed in acid handling systems, reactors, and piping where highly corrosive environments and reducing chemicals are present.
Pharmaceutical & Fine Chemicals
Used in vessels and systems that demand high purity and corrosion resistance to strong reducing agents during production and cleaning processes.
Electronics and Semiconductor Manufacturing
Suitable for acid handling components in wet etching and cleaning systems where metal purity and corrosion resistance are essential.
Waste Treatment & Pollution Control
Applied in systems treating acidic waste streams and corrosive off-gases where reducing acids and aggressive cleaning agents are used.
HASTELLOY B-2's Thanks to its resistance to a wide range of non-oxidizing acids and its proven performance in demanding environments, HASTELLOY B-2 remains a trusted choice for critical chemical service where long-term corrosion resistance is key
WHY CHOOSE US?
FAQ's
What is Hastelloy B2 and what are its properties?
Hastelloy B2 is a nickel-molybdenum alloy designed for outstanding resistance to reducing acids. It maintains strength at moderate to elevated temperatures, offers excellent ductility, weldability, and resists stress corrosion cracking, pitting, and crevice attack.
Which Hastelloy B2 products are available?
Products include seamless and welded pipes, tubes (capillary, U-bend, boiler, heat exchanger), sheets, plates, coils, strips, bars (round, flat, hex, square), pipe fittings, flanges, fasteners, wires, welding rods, wire mesh, and custom-fabricated components.
What are the key advantages of Hastelloy B2?
Hastelloy B2 provides exceptional resistance to hydrochloric, sulfuric, acetic, and phosphoric acids, excellent weldability, low sensitization risk, structural integrity under high temperatures, and reliable performance in chemical handling equipment.
In which industries is Hastelloy B2 used?
It is widely used in chemical processing, pickling and acid regeneration, agrochemical and fertilizer production, pharmaceutical and fine chemicals, electronics and semiconductor manufacturing, and waste treatment systems.
Why choose MOKSH TUBES & FITTINGS for Hastelloy B2?
We deliver pure and alloyed Hastelloy B2 in multiple forms, offer precision fabrication, maintain ISO certified quality systems, provide end to end supply chain support, and ensure responsive technical assistance with global delivery.
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For assistance, technical specifications, or pricing inquiries, connect with Moksh Tubes & Fittings LLP – your go-to partner for HASTELLOY B-2 expertise.
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