Introduction
Inconel 800H Pipe Fittings are highly engineered components designed for use in demanding, high-temperature, and corrosive environments. Manufactured from nickel-iron-chromium alloy, these fittings deliver exceptional strength and oxidation resistance at elevated temperatures. As a leading manufacturer and supplier of Inconel 800H pipe fittings, we provide a complete range of buttweld and forged fittings that meet global standards such as ASTM B366 and ASME SB366. Our products are widely used in industries where reliability and durability are critical, such as power generation, petrochemical processing, and heat treatment applications.
What is Inconel 800H?
Inconel 800H (UNS N08810 / WNR 1.4958) is a nickel-iron-chromium alloy specifically developed for high-temperature structural applications. It offers excellent resistance to oxidation, carburization, and nitridation at temperatures up to 1100°C (2000°F). The alloy maintains superior mechanical properties and metallurgical stability due to its controlled carbon content and solution-annealed microstructure.
Inconel 800 vs 800H vs 800HT
| Grade | Carbon Content | Temperature Range | Typical Applications |
|---|---|---|---|
| Inconel 800 | Low | Up to 800°C | Heat exchangers, condensers |
| Inconel 800H | Higher (0.05–0.10%) | Up to 1000°C | Superheaters, pressure vessels |
| Inconel 800HT | Modified (with Ti + Al) | Up to 1100°C | Industrial furnaces, heaters |
Inconel 800H offers better creep and rupture strength compared to the standard Inconel 800, making it ideal for long-term service under high stress and temperature.
Types of Inconel 800H Pipe Fittings
As a reputed Inconel 800H pipe fittings manufacturer and supplier, we offer a complete range of fittings that ensure leak-proof and corrosion-resistant connections across various process systems.
1. Inconel 800H Buttweld Fittings
These are welded directly to pipes, providing a strong and seamless connection.
Available types:
- Elbow (45°, 90°, 180°)
- Tee (equal & reducing)
- Reducer (concentric & eccentric)
- Stub End
- Pipe Cap
- Cross
2. Inconel 800H Forged Fittings
Used in smaller pipelines and high-pressure systems.
Available types:
- Socket Weld Elbow & Tee
- Threaded Elbow, Tee & Coupling
- Union & Plug
3. Custom Fabricated Fittings
Specialized designs can be produced as per client drawings or industry specifications for unique process applications.
All fittings are manufactured in compliance with ASTM B366 / ASME SB366, ensuring precise dimensional accuracy and superior performance.
Chemical Composition & Mechanical Properties
Chemical Composition (% by weight)
| Element | Ni | Cr | Fe | C | Al | Ti |
|---|---|---|---|---|---|---|
| Inconel 800H | 30–35 | 19–23 | Balance | 0.05–0.10 | 0.15–0.60 | 0.15–0.60 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 600 MPa (min) |
| Yield Strength | 275 MPa (min) |
| Elongation | 30% (min) |
| Hardness | ≤ 200 HB |
These properties make Inconel 800H pipe fittings suitable for use in environments where both thermal stress and oxidation resistance are critical.
Key Features & Benefits
- High-Temperature Strength: Retains structural integrity up to 1000°C.
- Excellent Oxidation Resistance: Performs reliably in air, steam, and combustion gases.
- Corrosion Resistance: Withstands attack from sulfur, carbon dioxide, and chloride-rich media.
- Dimensional Stability: Minimal deformation even after long exposure to high heat.
- Weldability: Compatible with standard fusion and resistance welding methods.
- Long Service Life: Superior fatigue and creep resistance ensure durability in harsh industrial operations.
Applications & Industries Served
Due to its outstanding mechanical and metallurgical properties, Inconel 800H pipe fittings are extensively used in industries that operate under severe temperature and pressure conditions.
Common Applications
- Heat Exchangers
- Superheater and Reheater Tubes
- Steam Generators
- Process Piping Systems
- Pressure Vessels and Boilers
- Industrial Furnaces
Industries Served
- Power Generation
- Petrochemical & Chemical Processing
- Oil & Gas Refining
- Heat Treatment Plants
- Marine & Offshore Engineering
- Aerospace & Energy
The alloy’s ability to maintain strength and resist scaling makes it one of the most preferred materials for high-performance piping systems.
Standards, Testing & Quality Assurance
All Inconel 800H fittings are manufactured under strict quality control procedures and international standards to ensure superior performance and reliability.
Standards
- ASTM B366 / ASME SB366
- ANSI / ASME B16.9, B16.11
- MSS-SP-43, MSS-SP-75
- DIN & JIS specifications available on request
Quality Testing
Each fitting undergoes a comprehensive series of tests, including:
- Positive Material Identification (PMI)
- Ultrasonic & Radiographic Testing
- Hydrostatic Pressure Test
- Hardness & Tensile Tests
- Intergranular Corrosion (IGC) Test
We provide full Material Test Certificates (MTC) as per EN 10204 3.1 / 3.2, ensuring traceability and transparency.
Inconel 800H vs Inconel 800HT vs 800
| Property | Inconel 800 | Inconel 800H | Inconel 800HT |
|---|---|---|---|
| Carbon Content | 0.05% max | 0.05–0.10% | 0.06–0.10% |
| Creep Strength | Moderate | High | Very High |
| Max Operating Temp | 800°C | 1000°C | 1100°C |
| Applications | Condensers, Heat Exchangers | Pressure Vessels, Piping | Industrial Furnaces, Heaters |
Inconel 800H provides the ideal balance between strength, cost, and availability, making it suitable for general high-temperature applications.
How to Choose a Reliable Manufacturer or Supplier
When selecting an Inconel 800H fittings supplier, it’s important to ensure product quality, certification, and service reliability.
Key Factors to Consider:
- Certifications: ISO 9001, PED, and NACE compliance.
- Standards: Conformance to ASTM, ASME, and ANSI codes.
- Testing & Inspection: Ensure MTC and third-party inspection availability.
- Experience: Choose suppliers with proven expertise in high-nickel alloys.
- Global Delivery: Check for export capabilities and fast lead times.
By partnering with a trusted Inconel 800H pipe fittings manufacturer, buyers can ensure consistent quality, traceability, and on-time delivery.
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
Inconel 800H pipe fittings combine exceptional high-temperature strength with outstanding corrosion resistance, making them indispensable for demanding industrial applications. As a reliable manufacturer and supplier of Inconel 800H fittings, we deliver precision-engineered elbows, tees, reducers, and custom configurations that meet global standards and performance expectations.
For premium quality Inconel 800H pipe fittings with assured quality, timely delivery, and competitive pricing — contact us today for a customized quotation.
Frequently Asked Questions (FAQ) – Inconel 800H Pipe Fittings
1. What are Inconel 800H pipe fittings used for?
Inconel 800H pipe fittings are used in high-temperature and high-pressure systems where strength and corrosion resistance are essential. Common applications include heat exchangers, superheaters, steam generators, and petrochemical process piping. Their ability to maintain stability and mechanical strength makes them ideal for power plants, refineries, and chemical processing industries.
2. What is the difference between Inconel 800, 800H, and 800HT?
All three alloys belong to the Inconel 800 series, but they differ in carbon and alloying element content:
- Inconel 800: Standard alloy for moderate temperatures.
- Inconel 800H: Higher carbon content (0.05–0.10%) for improved creep strength up to 1000°C.
- Inconel 800HT: Modified version with added aluminum and titanium for maximum high-temperature stability.
Inconel 800H is typically chosen for long-term service in high-temperature environments.
3. Are Inconel 800H pipe fittings resistant to corrosion?
Yes. Inconel 800H fittings offer excellent corrosion resistance in both oxidizing and reducing atmospheres. They resist oxidation, carburization, and nitridation in high-temperature environments, as well as attack from sulfur compounds and chlorides. This makes them ideal for use in harsh chemical and marine conditions.
4. What standards apply to Inconel 800H pipe fittings?
Inconel 800H pipe fittings are manufactured according to:
- ASTM B366 / ASME SB366 – Material standard
- ASME B16.9 / B16.11 – Dimensional standards for buttweld and forged fittings
- MSS-SP-43 / SP-79 / SP-95 – Additional manufacturing standards
Compliance with these standards ensures dimensional accuracy, pressure integrity, and performance reliability.
5. What types of Inconel 800H fittings are available?
Common types include:
- Buttweld Fittings: Elbow, Tee, Reducer, Cap, Stub End, Cross
- Forged Fittings: Socket Weld Elbow, Threaded Tee, Union, Plug
- Custom Fittings: Designed to specific dimensions or customer drawings
All types are available in seamless and welded forms, suitable for diverse industrial applications.
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