Hastelloy B2 Flanges Manufacturer & Supplier
Midland Alloys Inc. is a trusted Indian manufacturer and global supplier of Hastelloy B2 Flanges, offering consistent quality, precision machining, and industry-approved finishes. These UNS N10665 nickel-molybdenum alloys are known for their ability to handle reducing agents such as hydrochloric acid. Hastelloy B2’s chemical composition improves corrosion resistance through a high concentration of nickel and molybdenum and a low concentration of iron, carbon, and silicon. We offer various types of flanges such as Alloy B2 Square Flanges, Blind RTJ Flanges, and Weld Neck Flanges. Every flange complies with international standards including BS1560-3.1, API7S-15, and API7S-43, and has various surfaces such as pickled, mirror-finished, or rough turned. Hastelloy B2 Flange prices in India vary by size, schedule and finish.
Benefits of Using Hastelloy B2 Flanges
Hastelloy B2 Flanges offer reliability in harsh chemical environments. They are appropriate for critical service applications, because of their unique composition and high qualities.
- Excellent resistance to corrosion caused by reducing agents and hydrochloric acid.
- Handle temperatures up to 540°C, making it suitable for both static and dynamic thermal conditions.
- Maintains high tensile strength, elongation, and ductility, even after forming or welding.
- Allows seamless fabrication without hot cracking or embrittlement, especially during GTAW/TIG welding.
- Performs reliably in environments with high chloride content and low pH, resisting pit and crevice corrosion.
Hastelloy B2 Flanges Standard Specification
1/2" (15 NB) to 48" (1200NB)
ASTM B564 / ASME SB56
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Threaded / Screwed / Forged / Plate
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Forging, Rolling, Casting
FNPT, NPT, BSPT, MNPT, BSPP
Contact us today to discuss how Hastelloy B2 Flanges can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Grade | Ni | Mo | Fe | C | Co | Cr | Mn | Si | Ti | W | Al | Cu |
| Hastelloy B2 | Balance (≈ 70) | 26.0 – 30.0 | 2.0 max | 0.02 max | 1.0 max | 1.0 max | 1.0 max | 0.10 max | 0.20 max | 0.20 max | 0.50 max | 0.20 max |
| Property | Value |
| Tensile Strength | 760 MPa (110,000 Psi) |
| Yield Strength (0.2% Offset) | 350 MPa (50,000 Psi) |
| Elongation | 40 % |
| Hardness | 95 HRB max |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| Hastelloy B2 | 2.4617 | N10665 | NW 0665 | — | — | — | NiMo28 |
Nickel Alloy Flanges Grades We Offer
Difference Between Hastelloy B2 and C22 Flanges
Hastelloy B2 Flanges are optimized for resistance to reducing environments due to their high molybdenum content and lack of chromium. While Hastelloy C22 Flanges are resistant to both oxidizing and reducing environments, because they include tungsten, iron, and chromium. In pure hydrochloric acid, B2 performs better, but C22 is more adaptable to other acids, including mixed situations. C22 is more resilient to changing conditions than B2, which is less tolerant of oxidizing contaminants. The difference lies in their corrosion resistance spectrum and alloying elements, which affect mechanical behavior and weld response.
Plate
Shear
Press
Inspection
Lathe
Drilling
Cleaning
Flange
Inspection
Analytic
Marking
Packing & Shipping
Applications of Hastelloy B2 Flanges
Hastelloy B2 Flanges find significant use in industries where aggressive media challenge conventional materials. They are resistant to hydrochloric acid and other strong reducing agents in chemical processing. They are utilized in the petrochemical sector for transfer pipes and reactor vessels that are subjected to hot, caustic fluids. In the pharmaceutical sector, DIN 2.4617 Hastelloy B2 Flanges maintain integrity under clean-in-place (CIP) procedures involving acidic cleaning agents. Power generation systems utilize them in heat exchangers and scrubbers, while the oil and gas sector integrates them into offshore rigs and sour gas operations due to their excellent hydrogen embrittlement resistance.
Why Choose Midland Alloys Inc. for Hastelloy B2 Flanges
Midland Alloys Inc. offers high-quality Hastelloy B2 Flanges. Our production meets BS1560-3.1, API7S-15, API7S-43, and ASTM B564 UNS N10665 standards through precision processes backed by ISO-certified systems. We offer full customization, cut-to-length, forged or machined ends, pressure class options, and surface finishes tailored to project specs. We guarantee stringent in-house testing, third-party inspection, and complete mill test certifications as a supplier of Hastelloy B2 Flanges to customers in Europe, the Gulf, Southeast Asia and Africa. Whether for bulk exports or specialized small orders, our team assures on-time delivery, project-based support. We build long-term partnerships rooted in quality assurance, industry trust and customer satisfaction.
FAQs
Depending on the type and thickness, Hastelloy B2 flanges are usually offered in pressure ratings between 150# and 2500#.
GTAW (TIG welding) is recommended for joining Hastelloy B2 flanges. Pre-cleaning and low heat input help prevent cracking and maintain corrosion resistance.
Yes, Hastelloy B2 flanges are ideal for vacuum systems and high-purity process lines because of their low carbon and silicon content particularly in situations where contamination control is crucial.
