Introduction
As a trusted Hastelloy B3 Pipe Fittings Manufacturer and Supplier, we provide high-quality corrosion-resistant fittings for demanding industrial environments. Hastelloy B3 is a nickel-molybdenum alloy renowned for its exceptional resistance to hydrochloric acid and other strong reducing agents. Designed for use in chemical, petrochemical, and marine industries, these fittings deliver superior performance and durability even under extreme conditions.
Our Hastelloy B3 pipe fittings are manufactured in compliance with ASTM B366 and ASME B16.9/B16.11 standards, ensuring precise dimensions, strength, and long-term reliability.
What Is Hastelloy B3?
Hastelloy B3 (UNS N10675) is a high-performance nickel-molybdenum alloy known for its outstanding resistance to strong acids such as hydrochloric, hydrobromic, and sulfuric acid. It exhibits better thermal stability and improved fabricability compared to its predecessor, Hastelloy B2.
The alloy maintains its corrosion resistance even during short-term exposure to high temperatures, making it suitable for chemical processing and pressure-handling applications. It conforms to ASTM B335 (bars) and ASTM B366 (fittings) specifications.
With a balanced microstructure and low carbon content, Hastelloy B3 prevents carbide precipitation during welding, ensuring strong and durable joints.
Types of Hastelloy B3 Pipe Fittings
We manufacture a wide range of Hastelloy B3 pipe fittings to meet diverse industrial needs. All fittings are available in buttweld, forged, and socket-weld configurations.
1. Hastelloy B3 Elbows (45° & 90°)
Used to change the direction of fluid flow in piping systems. Available in short-radius and long-radius types, these elbows maintain flow efficiency and minimize pressure drop.
2. Hastelloy B3 Tees & Crosses
Used to create branch connections, available as equal or unequal tees. These fittings ensure leak-proof distribution of fluids in multi-directional pipelines.
3. Hastelloy B3 Reducers
Available as concentric and eccentric reducers, they connect pipes of different diameters while maintaining smooth fluid flow and structural integrity.
4. Hastelloy B3 Stub Ends
Used in conjunction with lap joint flanges for easy dismantling of pipelines during inspection and maintenance.
5. Hastelloy B3 Caps
Designed to seal the ends of pipes, preventing leakage and protecting the pipeline system.
6. Hastelloy B3 Couplings & Nipples
Ideal for joining two pipes or fittings together. Available in threaded and socket weld forms.
All fittings are precision-engineered to ensure accurate dimensions, smooth surfaces, and consistent mechanical strength.
Chemical Composition & Mechanical Properties
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | Balance |
| Molybdenum (Mo) | 28.0 – 30.0 |
| Iron (Fe) | ≤ 3.0 |
| Chromium (Cr) | ≤ 1.5 |
| Cobalt (Co) | ≤ 3.0 |
| Carbon (C) | ≤ 0.01 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.1 |
Mechanical Properties:
- Tensile Strength: ≥ 760 MPa
- Yield Strength: ≥ 350 MPa
- Elongation: ≥ 40%
These properties make Nickel Alloy B3 Fittings ideal for use in high-stress, corrosive, and high-temperature applications.
Key Features & Benefits
- Superior Corrosion Resistance: Exceptional resistance to hydrochloric acid and strong reducing agents.
- High Thermal Stability: Retains strength and ductility even after heat exposure.
- Excellent Weldability: Low carbon and controlled chemistry minimize carbide precipitation.
- Mechanical Strength: Withstands high pressure and temperature.
- Long Service Life: Resistant to pitting, cracking, and stress corrosion.
- Dimensional Accuracy: Precision-made fittings for leak-proof installation.
Standards, Specifications & Sizes
Our Hastelloy B3 fittings are manufactured according to global standards:
- Standards: ASTM B366 / ASME SB366
- Dimensions: ASME B16.9 (Buttweld), ASME B16.11 (Forged)
- Size Range: ½” NB to 24” NB
- Schedules: SCH 10 to SCH 160 / XXS
- End Connections: Buttweld, Socket Weld, Threaded
- Forms: Seamless, Welded, Fabricated
All fittings are available with Mill Test Certificates (MTC) as per EN 10204 3.1/3.2.
Applications & Industries Served
Hastelloy B3 Pipe Fittings are designed for applications requiring maximum corrosion resistance and high reliability.
Common Industries:
- Chemical Processing Plants
- Petrochemical & Refinery Industries
- Marine and Offshore Engineering
- Power Generation & Heat Exchangers
- Pharmaceutical and Fertilizer Manufacturing
- Pulp & Paper Industry
These fittings perform exceptionally in systems handling acids, chlorides, and highly corrosive fluids.
Comparison: Hastelloy B3 vs Other Alloys
| Alloy | Key Feature | Limitation |
|---|---|---|
| Hastelloy B2 | Good acid resistance | Poor thermal stability |
| Hastelloy B3 | Better thermal stability and corrosion resistance | Slightly higher cost |
| Hastelloy C22 | Excellent oxidation resistance | Moderate in reducing acids |
Conclusion:
Hastelloy B3 offers a perfect combination of corrosion resistance, mechanical strength, and thermal stability, making it a superior choice for aggressive environments.
Quality Assurance & Testing
Each Hastelloy B3 fitting undergoes stringent quality control and inspection before dispatch.
Testing includes:
- Hydrostatic Test
- PMI (Positive Material Identification)
- Radiographic and Ultrasonic Testing
- Dimensional and Visual Inspection
- Intergranular Corrosion Test (IGC)
Our products comply with ASTM, ASME, ANSI, and ISO quality standards to ensure reliability and performance.
Packaging & Delivery
We ensure secure, export-grade packaging for every shipment.
- Each fitting is wrapped in plastic to prevent oxidation.
- Packed in fumigated wooden boxes or pallets.
- Marked with grade, size, heat number, and standard.
- Global delivery to USA, UAE, Europe, and Asia with full documentation.
Why Choose Us as Your Hastelloy B3 Fittings Manufacturer
- Over 20 years of experience in nickel alloy manufacturing.
- In-house production and testing facilities.
- Custom sizes and quick delivery across domestic and international markets.
- Competitive pricing and comprehensive after-sales support.
- Trusted by clients in chemical, oil & gas, and power sectors worldwide.
Our Commitment:
Delivering precision-engineered, corrosion-resistant fittings that meet global standards and exceed customer expectations.
To learn more about our commitment to quality and industry expertise, visit our About Us page. For inquiries, quotations, or project support, please reach out through our Contact Us page — our team will be glad to assist you.
Conclusion
Hastelloy B3 Pipe Fittings offer unparalleled corrosion resistance, mechanical strength, and long-term performance in the most demanding industrial environments. Manufactured to ASTM B366 specifications, these fittings are ideal for handling aggressive chemicals and high-temperature processes.
As a leading Hastelloy B3 Pipe Fittings Manufacturer, Supplier, and Exporter, we are committed to delivering top-quality products, timely delivery, and excellent customer support.
📞 Contact us today to request a quote or learn more about our complete range of Nickel Alloy B3 fittings.
Frequently Asked Questions (FAQs)
1. What are Hastelloy B3 Pipe Fittings?
Hastelloy B3 pipe fittings are nickel-molybdenum alloy components designed for use in piping systems that handle highly corrosive chemicals. They provide excellent resistance to hydrochloric acid and other strong reducing agents, making them ideal for chemical, petrochemical, and marine applications.
2. What is the composition of Hastelloy B3 alloy?
Hastelloy B3 primarily contains nickel (Ni) as the base metal, with 28–30% molybdenum (Mo), small amounts of iron (Fe), chromium (Cr), and cobalt (Co). This unique combination offers high corrosion resistance and thermal stability.
3. What standards apply to Hastelloy B3 Pipe Fittings?
Hastelloy B3 fittings are manufactured according to ASTM B366 and ASME SB366 standards. Dimensional specifications follow ASME B16.9 for buttweld fittings and ASME B16.11 for forged fittings.
4. What are the common types of Hastelloy B3 fittings available?
The main types include elbows, tees, reducers, caps, stub ends, and couplings. They are available in buttweld, forged, and socket-weld forms to suit different piping configurations.
5. What are the advantages of using Hastelloy B3 fittings?
- Excellent corrosion resistance against hydrochloric and sulfuric acids
- High thermal stability
- Good mechanical strength
- Easy to weld and fabricate
- Long service life and minimal maintenance
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