Hastelloy B2 Buttweld Fittings Manufacturer & Supplier
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Midland Alloys Inc. is a trusted Indian manufacturer and global supplier of Hastelloy B2 Buttweld Fittings, delivering high-quality piping solutions to various industrial sectors. These fittings come in seamless, ERW, and welded varieties, including collars, stub ends, elbows, reducers, tees, crosses, and caps. The material is made from nickel-molybdenum alloy B2 (UNS N10665 / DIN 2.4617), which has outstanding resistance to reducing agents like hydrochloric acid. The alloy primarily contains nickel (~70%), and molybdenum (~28%), providing a strong microstructure with superior corrosion resistance. Designed in compliance with ASTM B366 WPHB2 and related standards, these pipe fittings maintain outstanding performance in aggressive chemical environments. The low carbon content improves weldability, while strict adherence to ASME B16.9, MSS SP-43, and EN/DIN ensures dimensional accuracy and durability.
Benefits of Hastelloy B2 Buttweld Fittings
Hastelloy B2 Buttweld Fittings deliver high-performance solutions in harsh chemical and industrial environments, offering reliability, long service life, and structural integrity.
- Superior Strength and Durability: Withstand high-pressure and high-temperature conditions without deformation or failure.
- Leak-Proof Connections: Precisely engineered for tight-fitting joints that prevent fluid and gas leaks in critical pipelines.
- Smooth Flow and Reduced Friction: A smooth interior surface keeps fluid flow constant and reduces pressure dips.
- Space-Efficient Design: Compact shape and tailored configurations reduce installation space and support efficient piping layouts.
- Enhanced Aesthetic Appeal: Uniform surface finish and clean weld joints improve the visual and structural quality of the pipeline system.
Hastelloy B2 Buttweld Fittings Specification
Seamless Butt Weld Fittings: 1/2" - 10" Welded Butt Weld Fittings: 1/2" - 48"
ASTM B366 / ASME SB366
Forge, Cast, Push, Press, etc.
90 Deg. Elbow, 45 Degree Elbow, LR/SR Elbow, Reducers, Tee, Cross, Bends, U bend, 180 Deg Bend, End Cap, Lap-joint Stub End
ASME/ANSI B16.9, ASME B16.28, MSS-SP-43, BS4504, BS4504, BS1560, BS10
Plain End, Beveled End, Treaded
SCH10, SCH20, SCH30, STD SCH40, SCH60, XS, SCH 80, SCH 100, SCH 120, SCH 140, SCH 160, XXS available with NACE MR 01-75
Seamless / Welded / Fabricated
Types of Hastelloy B2 Buttweld Fittings
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Elbow (90°, 45°, Long Radius, Short Radius)Modifies the pipeline's flow direction at predetermined angles with regulated radii.
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Tee (Equal Tee, Reducing Tee)Adjusts the size of the main and branch lines to split or combine flow at 90° intersections.
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A reducer (eccentric or concentric)joins pipes with varying diameters while preserving flow offset or alignment.
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stub endIn non-permanent piping configurations, the stub end (long or short) connects to lap joint flanges for disassembly.
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Return Bends (180° bend)Redirects flow by 180 degrees, allowing the pipeline to reverse direction.
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Cross (Equal Cross, Reducing Cross)Provides multidirectional flow by joining four pipes at right angles.
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pipe capTo stop flow or pressure, an end cap also known as a pipe cap, seals the pipe's open end.
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Bend (3D, 5D, Custom Radius)This tool uses predefined or custom radii to gradually change the direction of pipelines.
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nipplesShort pipe segments called "nipples" (also known as "barrel" or "swage") are used to join two fittings or pipes.
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Collar / CouplingLinks two pipe sections in a straight run with a secure and leak-free joint.
Technical Details & Delivery Condition
| Grade | C | Ni | Si | N | S | Mn | P | Cr | Mo |
| Hastelloy B2 | 0.02 max. | Bal | 0.1 max. | Bal | 0.03 max. | 1.0 max. | 0.04 max. | 1.0 max. | 26 – 30 |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 9.2 g/cm3 | 1370 °C (2500 °F) | Psi –1,10,000 , MPa –760 | Psi – 51,000 , MPa – 350 | 4o % |
| STANDARD | UNS | WERKSTOFF NR. | JIS | BS | GOST | EN | OR |
| Hastelloy B2 | N10665 | 2.4617 | – | – | – | – | – |
Hastelloy B2 Buttweld Fittings Grades We Offer
Hastelloy B2 Buttweld Fittings Dimension
| Nominal Pipe Size | Outside Diameter | 90° Elbows | 45° Elbows | 180° Returns | ||||
| (inches) | Long Radius | Short Radius | Long Radius | Long Radius | ||||
| (mm) | (inches) | Center to Face (inches) | Center to Face (inches) | Center to Face (inches) | Radius (inches) | Center to Center (inches) | Back to face (inches) | |
| 1/2 | 21.3 | 0.840 | 1 1/2 | – | 5/8 | 2 | 1 7/8 | |
| 3/4 | 26.7 | 1.050 | 1 1/8 | – | 7/16 | 2 1/4 | 1 11/16 | |
| 1 | 33.4 | 1.315 | 1 1/2 | 1 | 7/8 | 3 | 2 3/16 | |
| 1 1/4 | 42.2 | 1.660 | 1 7/8 | 1 1/4 | 1 | 3 3/4 | 2 3/4 | |
| 1 1/2 | 48.3 | 1.900 | 2 1/4 | 1 1/2 | 1 1/8 | 3 | 4 1/2 | 3 1/4 |
| 2 | 60.3 | 2.375 | 3 | 2 | 1 3/8 | 4 | 6 | 4 3/16 |
| 2 1/2 | 73.0 | 2.875 | 3 3/4 | 2 1/2 | 1 3/4 | 5 | 7 1/2 | 5 3/16 |
| 3 | 88.9 | 3.500 | 4 1/2 | 3 | 2 | 6 | 9 | 6 1/4 |
| 3 1/2 | 101.6 | 4.000 | 5 1/4 | 3 1/2 | 2 1/4 | 7 | 10 1/2 | 7 1/4 |
| 4 | 114.3 | 4.500 | 6 | 4 | 2 1/2 | 8 | 12 | 8 1/4 |
| 5 | 141.3 | 5.563 | 7 1/2 | 5 | 3 1/8 | 10 | 15 | 10 5/16 |
| 6 | 168.3 | 6.625 | 9 | 6 | 3 3/4 | 12 | 18 | 12 5/16 |
| 8 | 219.1 | 8.625 | 12 | 8 | 5 | 12 | 24 | 16 5/16 |
| 10 | 273.1 | 10.750 | 15 | 10 | 6 1/4 | 15 | 30 | 20 3/8 |
| 12 | 323.9 | 12.750 | 18 | 12 | 7 1/2 | 18 | 36 | 24 3/8 |
Hastelloy B2 Buttweld Fittings Weight Chart
| Pipe Elbow Nominal Size | Pipe Elbow Outside Diameter Y | Wall Thickness T (Pipe Elbow Schedule) | 45 Deg. Elbow LR Centre to Face B | 45 Deg. Elbow LR Weight | 90 Deg. Elbow LR Centre to Face A | 90 Deg. Elbow LR Weight | 90 Deg. Elbow SR Centre to Face A | 90 Deg. Elbow SR Weight | ||
| mm | in | mm | mm | Schedule | mm | kg | mm | kg | mm | kg |
| 15 | 1/2” | 21.3 | 2.78 | STD | 15.9 | 0.04 | 38.1 | 0.08 | – | – |
| 3.73 | X.S | 15.9 | 0.05 | 38.1 | 0.10 | – | – | |||
| 20 | 3/4” | 26.7 | 2.87 | STD | 11.1 | 0.04 | 28.6 | 0.08 | – | – |
| 3.91 | X.S | 11.1 | 0.05 | 28.6 | 0.11 | – | – | |||
| 25 | 1” | 33.4 | 3.38 | STD | 22.2 | 0.09 | 38.1 | 0.15 | 25.4 | 0.11 |
| 4.55 | X.S | 22.2 | 0.11 | 38.1 | 0.19 | 25.4 | 0.14 | |||
| 32 | 11/4” | 42.2 | 3.56 | STD | 25.4 | 0.14 | 47.6 | 0.28 | 31.75 | 0.18 |
| 4.85 | X.S | 25.4 | 0.2 | 47.6 | 0.39 | 31.75 | 0.24 | |||
| 40 | 11/2” | 48.3 | 3.68 | STD | 28.6 | 0.2 | 57.1 | 0.4 | 38.1 | 0.26 |
| 5.08 | X.S | 28.6 | 0.25 | 57.1 | 0.5 | 38.1 | 0.35 | |||
| 50 | 2” | 60.3 | 3.91 | STD | 34.9 | 0.36 | 76.2 | 0.72 | 50.8 | 0.5 |
| 5.54 | X.S | 34.9 | 0.5 | 76.2 | 1.0 | 50.8 | 0.68 | |||
| 65 | 21/2” | 73.0 | 5.16 | STD | 44.4 | 0.73 | 95.2 | 1.46 | 63.5 | 0.95 |
| 7.01 | X.S | 44.4 | 0.91 | 95.2 | 1.82 | 63.5 | 1.27 | |||
| 80 | 3” | 88.9 | 5.49 | STD | 50.8 | 1.1 | 114.3 | 2.18 | 76.2 | 1.45 |
| 7.62 | X.S | 50.8 | 1.45 | 114.3 | 2.86 | 76.2 | 1.95 | |||
| 100 | 4” | 114.3 | 6.02 | STD | 63.5 | 2.1 | 152.4 | 4.2 | 101.6 | 2.8 |
| 8.56 | X.S | 63.5 | 2.9 | 152.4 | 5.7 | 101.6 | 3.9 | |||
| 125 | 5” | 141.3 | 6.65 | STD | 79.4 | 3.4 | 190.0 | 6.8 | 127.0 | 4.8 |
| 9.5 | X.S | 79.4 | 5.0 | 190.0 | 10.0 | 127.0 | 6.5 | |||
| 150 | 6” | 168.3 | 7.11 | STD | 95.2 | 5.1 | 229.0 | 10.1 | 152.4 | 6.8 |
| 10.97 | X.S | 95.2 | 7.7 | 229.0 | 15.3 | 152.4 | 10.2 | |||
| 200 | 8” | 219.1 | 8.18 | STD | 127.0 | 10.2 | 305.0 | 20.4 | 203.0 | 13.6 |
| 12.7 | X.S | 127.0 | 15.5 | 305.0 | 30.9 | 203.0 | 20.9 | |||
| 250 | 10” | 273.9 | 9.27 | STD | 159.0 | 18.1 | 381.0 | 36.1 | 254.0 | 24.1 |
| 12.7 | X.S | 159.0 | 24.4 | 381.0 | 48.8 | 254.0 | 32.5 | |||
| 300 | 12” | 323.9 | 9.52 | STD | 190.0 | 26.6 | 457.0 | 53.1 | 305.0 | 35.4 |
| 12.7 | X.S | 190.0 | 35.0 | 457.0 | 70.0 | 305.0 | 46.7 | |||
| 350 | 14” | 355.6 | 9.52 | STD | 222.0 | 34.1 | 533.0 | 68.1 | 356.0 | 45.4 |
| 12.7 | X.S | 222.0 | 45.0 | 533.0 | 90.0 | 356.0 | 60.0 | |||
| 400 | 16” | 406.4 | 9.52 | STD | 254.0 | 45.0 | 610.0 | 89.3 | 406.0 | 59.5 |
| 12.7 | X.S | 254.0 | 59.0 | 610.0 | 118.0 | 406.0 | 78.7 | |||
| 450 | 18” | 457.0 | 9.52 | STD | 286.0 | 56.5 | 686.0 | 113.0 | 457.0 | 75.6 |
| 12.7 | X.S | 286.0 | 75.0 | 686.0 | 150.0 | 457.0 | 100.0 | |||
| 500 | 20” | 508.0 | 9.52 | STD | 318.0 | 85.0 | 762.0 | 140.0 | 508.0 | 93.5 |
| 12.7 | X.S | 318.0 | 112.5 | 762.0 | 186.0 | 508.0 | 124.0 | |||
| 600 | 24” | 610.00 | 9.52 | STD | 381.0 | 101.5 | 914.0 | 203.0 | 610.0 | 135.0 |
| 12.7 | X.S | 381.0 | 134.5 | 914.0 | 269.0 | 610.0 | 179.0 | |||
Difference Between Hastelloy B2 Buttweld Fittings and Hastelloy C22 Buttweld Fittings
While both Hastelloy B2 and C22 belong to the high-performance corrosion-resistant alloy family, their compositions and use cases differ significantly. Composed mainly of nickel and molybdenum, Hastelloy B2 Buttweld Fittings are less effective in oxidizing circumstances, but show exceptional resistance to reducing media, such as hydrochloric acid. In contrast, Hastelloy C22 Buttweld Fittings, containing nickel, molybdenum, chromium and iron offer corrosion resistance especially in oxidizing and mixed acid environments. Structurally, C22 fittings handle a wider range of chemicals, while B2 fittings are more suited for controlled reducing processes with minimal oxygen exposure.
Manufacturing Process of Hastelloy B2 Buttweld Fittings
Pipe
Cutting
Forming
Sizing
Heat Treatment
Pickling
Beveling
Polishing
Sand Blasting
Elbow
Inspection
Analytic
Marking
Packing & Shipping
Applications of Hastelloy B2 Buttweld Fittings
Hastelloy B2 Buttweld Fittings are essential components of piping systems in many different sectors and they have exceptional strength and resistance to corrosion. In chemical processing plants, they ensure the safe transportation of hydrochloric acid, acetic acid, and sulfuric acid without material degradation. In the petrochemical industry, they handle aggressive hydrocarbons and process streams under extreme pressure and temperature. Power generation units, especially nuclear and thermal, rely on these fittings for their strength in high-temperature environments. The low-carbon structure guarantees purity and hygienic operation in the food and pharmaceutical industries. In marine environments, where saltwater corrosion is a major concern B2 pipe fittings offer lasting performance and integrity.
Why Choose Midland Alloys Inc. for Hastelloy B2 Buttweld Fittings
Midland Alloys Inc. exporters high-quality Hastelloy B2 Buttweld Fittings, known for precision manufacturing and compliance with ASTM B366, ASME B16.9, and ISO-certified quality systems. To meet the particular project requirements, we provide full customization options, such as cut-to-length components, end preparations (BE/PE), unique schedules and surface treatments. As a top Hastelloy B2 Reducer Supplier, we cater to global clients across the Gulf, Europe, Africa, and Southeast Asia. Every batch undergoes in-house mechanical and chemical testing, is supplied with Mill Test Certificates (MTC), and can be inspected by third-party agencies as per client request. We guarantee on-time delivery, project-focused packing, and dependable management of both small and large orders.
FAQs –Hastelloy B2 Buttweld Fittings
Hastelloy B2 Buttweld Fittings can operate efficiently in temperatures ranging from cryogenic levels up to approximately 1000°F (537°C), depending on the media and pressure conditions.
Gas Tungsten Arc Welding (GTAW/TIG) and Gas Metal Arc Welding (GMAW/MIG) are preferred methods.
Yes, Hastelloy B2 exhibits excellent resistance to sulfuric acid, particularly in its concentrated and reducing forms.
