Incoloy 800H High-Temperature Tubes Heat Exchanger & Power Plant Boiler Systems ASTM B163

Incoloy 800H high-temperature tubes manufactured to ASTM B163 standards represent a premium solution for extreme thermal applications in power generation and process industries. This nickel-iron-chromium alloy, enhanced with controlled carbon content and stabilized with titanium, delivers exceptional creep resistance and high-temperature strength up to 815°C (1500°F). Particularly suited for heat exchangers, superheaters, and boiler systems, these tubes maintain structural integrity under prolonged thermal stress while resisting oxidation and carburization.

Key Material Advantages

Superior High-Temperature Performance

Creep rupture strength: Maintains mechanical properties under continuous thermal stress

Oxidation resistance: Forms protective chromium oxide layer at elevated temperatures

Carburization resistance: Withstands hydrocarbon-rich environments

Thermal stability: Minimal microstructural changes during long-term exposure

ASTM B163 Compliance Features

Chemical composition control:

Nickel: 30-35%

Chromium: 19-23%

Carbon: 0.05-0.10% (enhanced high-temperature strength)

Titanium: 0.15-0.60% (stabilization against sensitization)

Mechanical properties:

Tensile strength: ≥450 MPa

Yield strength: ≥170 MPa

Elongation: ≥30%

Manufacturing Excellence

Seamless construction for uniform stress distribution

Precise dimensional tolerances for critical heat transfer applications

Surface finish options including pickled and bright annealed

Critical Applications

Power Generation Systems

Fossil Fuel Boilers

Superheater and reheater tubes

Steam generating tubes in coal-fired plants

Heat recovery steam generator (HRSG) components

Nuclear Power Components

Steam generator tubing

Reactor coolant system piping

Auxiliary heat exchange systems

Process Industry Equipment

Ethylene cracking furnaces

Hydrogen reformer tubes

Catalytic reactor systems

Flue gas ducting

Heat Exchanger Systems

Shell-and-tube heat exchangers for refinery services

Waste heat recovery units

Process gas coolers

Industry Requirements & User Needs

Power Plant Operators Demand:

✔ Extended service life (60,000+ operating hours)

✔ Reduced unscheduled downtime

✔ Compliance with ASME Boiler & Pressure Vessel Code

✔ Resistance to thermal fatigue cycling

Heat Exchanger Manufacturers Require:

✔ Consistent material properties across production batches

✔ Optimized wall thickness for thermal efficiency

✔ Weldability for field installation and repairs

✔ Cost-effective alternative to more expensive nickel alloys

Quality Assurance Requirements

Full ASTM B163 certification

Ultrasonic testing for defect detection

Hydrostatic testing for pressure integrity

Grain size control for optimal creep resistance

Third-party inspection available (BV, Lloyds, TUV)

Technical Comparison

Property	Incoloy 800H	304H SS	Alloy 600
Max Temp (°C)	815	870	1095
Creep Strength	Excellent	Good	Superior
Cost Factor	2.5x	1x	4x
Oxidation Res.	Excellent	Good	Excellent

Comparative data for similar service applications

Conclusion

ASTM B163 Incoloy 800H high-temperature tubes provide an optimal balance of performance and cost for demanding thermal applications in power and process industries. Their enhanced carbon content delivers superior creep strength compared to standard Incoloy 800, while maintaining excellent fabrication characteristics and corrosion resistance.

For engineering teams specifying high-temperature tubing:

Consider 800H for applications between 540-815°C (1000-1500°F)

Evaluate wall thickness based on pressure and creep requirements

Specify heat treatment (solution annealing) for optimal properties

Review welding procedures to maintain corrosion resistance

Available Support Services:

Application-specific technical data

Creep life calculation assistance

Welding procedure qualification support

Custom cutting and bending services

FAQ:

Q: What is DLX Incoloy Alloy?

A: DLX Incoloy Alloy is a high-performance nickel-chromium alloy that is resistant to high-temperature corrosion and oxidation. It is commonly used in applications such as gas turbines, chemical processing, and nuclear reactors.

Q: What is the composition of DLX Incoloy Alloy?

A: DLX Incoloy Alloy consists of nickel, chromium, iron, and smaller amounts of other metals such as molybdenum, titanium, and aluminum. The exact composition can vary depending on the specific grade of Incoloy Alloy.

Q: What are the advantages of using DLX Incoloy Alloy?

A: DLX Incoloy Alloy has excellent resistance to high-temperature corrosion and oxidation, making it ideal for use in harsh environments. It also has good mechanical properties at both high and low temperatures, and is highly resistant to cracking and stress-corrosion.

Q: Where is DLX Incoloy Alloy manufactured?

A: DLX Incoloy Alloy is manufactured in China, where it is produced to strict quality control standards to ensure consistent performance and reliability.

Q: What are some common applications for DLX Incoloy Alloy?

A: DLX Incoloy Alloy is commonly used in applications such as gas turbines, chemical processing, and nuclear reactors. It is also used in the aerospace industry for parts such as exhaust nozzles and afterburner parts.