Introduction
Incoloy 800 Pipe Fittings are widely recognized for their outstanding resistance to heat, oxidation, and corrosion. These fittings are used in critical industries such as petrochemical processing, power generation, and heat-treating equipment—where reliability at high temperatures is essential.
As a leading manufacturer, supplier, and exporter of Incoloy 800 pipe fittings, we deliver products that meet international quality standards and ensure long-term service life even in the harshest environments. Our range includes elbows, tees, reducers, caps, stub ends, and crosses—engineered to perfection for diverse industrial systems.
What Is Incoloy 800 Alloy?
Incoloy 800 is a nickel-iron-chromium alloy designed for excellent strength and oxidation resistance at elevated temperatures. It maintains structural stability in environments where conventional stainless steels fail.
The alloy family includes Incoloy 800H and Incoloy 800HT, which contain slightly higher carbon and aluminum-titanium contents for improved creep-rupture properties. These variants make the alloy suitable for continuous operation above 600 °C.
Incoloy 800 is often the material of choice for heat exchangers, chemical processing equipment, and steam superheaters because of its ability to withstand both reducing and oxidizing conditions.
Types of Incoloy 800 Pipe Fittings
We manufacture and export a complete range of Incoloy 800 buttweld and forged fittings, available in seamless and welded forms. Each type serves a specific purpose in pipeline systems:
- Elbow: Changes the flow direction (available in 45°, 90°, and 180° angles).
- Tee: Divides or combines fluid flow in process lines.
- Reducer: Connects pipes of different diameters while maintaining smooth flow.
- Stub End: Used with lap joint flanges for easy assembly and disassembly.
- Cap: Closes the pipe end to stop the flow permanently or temporarily.
- Cross: Connects four pipes in a single joint for complex piping networks.
All fittings comply with ASTM B366 / ASME SB366 specifications to ensure durability and dimensional accuracy.
Chemical Composition of Incoloy 800
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 30 – 35 |
| Chromium (Cr) | 19 – 23 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤ 0.1 |
| Manganese (Mn) | ≤ 1.5 |
| Silicon (Si) | ≤ 1.0 |
| Aluminum + Titanium | 0.3 – 1.0 |
This balanced composition offers superior oxidation and carburization resistance, enabling the alloy to retain mechanical integrity at temperatures up to 1100 °F (600 °C).
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 520 MPa |
| Yield Strength | ≥ 205 MPa |
| Elongation | ≥ 30 % |
| Melting Range | 1350 – 1400 °C |
These mechanical properties make Incoloy 800 fittings suitable for demanding, high-temperature, and high-pressure applications.
Manufacturing Standards & Specifications
Our Incoloy 800, 800H, and 800HT fittings are manufactured according to global standards:
- Standards: ASTM B366 / ASME SB366, MSS-SP-43, ANSI B16.9, B16.28
- Sizes: ½″ NB to 24″ NB (custom sizes on request)
- Type: Seamless / Welded / Fabricated
- End Connections: Buttweld, Socket Weld, Threaded
Each fitting undergoes strict quality control to ensure perfect dimensional accuracy and flawless surface finish.
Key Features & Advantages
- Excellent resistance to oxidation and carburization at elevated temperatures
- High mechanical strength and toughness
- Outstanding structural stability during prolonged exposure to heat
- Good corrosion resistance in both acidic and oxidizing environments
- Compatibility with various processing media including steam and hydrocarbons
- Easy fabrication and welding properties
These advantages make Incoloy 800H and 800HT fittings ideal for applications where other alloys fail due to scaling or loss of strength.
Applications & Industries Served
Incoloy 800 pipe fittings are preferred in industries that demand exceptional performance under thermal stress and corrosive conditions:
- Power generation: Superheaters, reheater tubes, boilers
- Petrochemical industry: Heat exchangers, reactors, furnace components
- Chemical processing: Pressure vessels, acid tanks, pipelines
- Refineries: Heater tubes, transfer piping
- Nuclear and thermal plants: Steam generators and feedwater heaters
- Industrial heating equipment: Retorts and furnace fixtures
Their ability to resist chloride stress corrosion cracking and scaling makes them a cost-effective choice for long-term operation.
Why Choose Mcneil Instruments Inc?
As a reputed Incoloy 800 pipe fittings manufacturer, supplier, and exporter, we focus on quality, precision, and customer satisfaction.
- Advanced manufacturing facilities: CNC machining, hot forming, and solution annealing.
- Quality certifications: ISO 9001, PED, and other international approvals.
- Comprehensive range: Elbows, tees, reducers, caps, stub ends, crosses in 800, 800H, and 800HT grades.
- Global exports: Supplying to Asia, Europe, the Middle East, and North America.
- On-time delivery: Large inventory and efficient logistics for prompt dispatch.
Our experienced team ensures that each fitting meets both technical and delivery expectations of global clients.
Quality Testing & Packaging
Every Incoloy 800 fitting undergoes comprehensive inspection before shipment:
- Tests performed: PMI (Positive Material Identification), hydrostatic test, radiographic test, mechanical test, and visual examination.
- Documentation: Material Test Certificates (EN 10204 3.1 / 3.2), third-party inspection reports, and mill test certificates.
- Packaging: Fittings are individually packed in poly bags, then placed in fumigation-free wooden boxes to prevent damage during transit.
We ensure that our Incoloy 800H and 800HT pipe fittings reach customers safely and ready for installation.
Conclusion
Incoloy 800 Pipe Fittings are an essential component in systems exposed to extreme heat and corrosion. Their exceptional strength, oxidation resistance, and metallurgical stability make them indispensable across multiple industries.
As a trusted manufacturer, supplier, and exporter, [Your Company Name] provides precision-engineered Incoloy 800, 800H, and 800HT fittings that comply with ASTM B366 standards and meet global performance expectations.
Contact us today to request a quote or discuss your specific project requirements for Incoloy 800 Pipe Fittings.
Frequently Asked Questions (FAQ) About Incoloy 800 Pipe Fittings
1. What are Incoloy 800 Pipe Fittings?
Incoloy 800 pipe fittings are components made from a nickel-iron-chromium alloy designed to connect and control flow in piping systems that operate under high temperature and corrosive environments. They are available in forms such as elbows, tees, reducers, caps, and stub ends.
2. What is the difference between Incoloy 800, 800H, and 800HT?
- Incoloy 800: Standard version with good strength and oxidation resistance.
- Incoloy 800H: Contains higher carbon for improved creep resistance at elevated temperatures.
- Incoloy 800HT: Similar to 800H but with tighter control on aluminum and titanium content for superior high-temperature stability.
All three share similar corrosion resistance but differ in mechanical performance at high temperatures.
3. What are the main advantages of Incoloy 800 Pipe Fittings?
- Excellent resistance to oxidation and carburization
- High strength and toughness at elevated temperatures
- Superior resistance to chloride stress corrosion cracking
- Long service life and low maintenance requirements
- Easy fabrication and weldability
4. In which industries are Incoloy 800 fittings used?
These fittings are widely used in:
- Power generation and thermal plants
- Petrochemical and refinery industries
- Chemical processing units
- Heat exchangers, boilers, and condensers
- Furnace and heater tube assemblies
5. What standards and specifications cover Incoloy 800 fittings?
Incoloy 800, 800H, and 800HT pipe fittings conform to the following standards:
- ASTM B366 / ASME SB366
- ANSI B16.9, B16.28
- MSS-SP-43
- DIN and JIS equivalents
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