Incoloy 800 Seamless Tube

What is the difference between Incoloy 800, 800H, and 800HT seamless tubes?

Incoloy 800, 800H, and 800HT seamless tubes are variations of a nickel-iron-chromium alloy known for its excellent resistance to high-temperature and corrosive environments. While they share similarities, each grade possesses specific characteristics that make them suitable for different applications.

Incoloy 800 seamless tubes offer exceptional strength and resistance to oxidation, carburization, and nitridation. They are commonly used in heat exchangers, furnace components, and petrochemical processing equipment applications.

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Incoloy 800H seamless tubes have higher carbon content, which enables them to exhibit superior creep and rupture strength at elevated temperatures. This grade is particularly well-suited for applications that involve long-term exposure to high temperatures, such as industrial furnaces and thermal processing units.

On the other hand, Incoloy 800HT seamless tubes are designed to provide even higher strength and resistance to thermal creep. They feature controlled levels of aluminium and titanium, which promote the formation of a protective oxide scale, enhancing their performance in high-temperature environments. Incoloy 800HT seamless tubes are commonly employed in power generation, chemical processing, and heat-treating applications.

While all three grades offer excellent resistance to oxidation and corrosion, the distinction lies in their specific properties and performance characteristics. Therefore, selecting the appropriate grade based on the specific requirements of the intended application is crucial, considering factors such as temperature, duration of exposure, and corrosive environment.

What industries and applications commonly use Incoloy 800 / 800H / 800HT seamless tubes?

Incoloy 800, 800H, and 800HT seamless tubes find widespread usage across various industries due to their remarkable combination of high-temperature strength and corrosion resistance. In the petrochemical industry, these tubes are commonly employed in constructing heat exchangers, where they withstand corrosive environments and high temperatures encountered in refining processes. Additionally, the power generation sector extensively utilizes these tubes for applications such as boiler components, superheaters, and reheaters, where they exhibit exceptional resistance to oxidation and thermal fatigue.

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Drawing/ Floating Process

Pulling a metal bar, rod, or wire through the entirety of a die to change its finish, shape, size, and/or mechanical qualities is known as floating or drawing. The tube's outer, inner, and wall thicknesses are all reduced via the tube drawing procedure. Incoloy® Alloy 800 tubes benefit from maintaining the integrity of their surface.

Continuous Seamless Tube Mills

The production of seamless tubes has been transformed by continuous tube mills. These mills do away with the necessity for forging welding or filler metal, in contrast to conventional procedures. With the use of this technology, seamless pipes and tubes may be produced continuously, increasing productivity while lowering costs and improving efficiency.

Continuous Casting

A notable advancement in the production of seamless tubes is continuous casting. The metal is solidified into a continuous billet through the continuous pouring of molten metal into a water-cooled mould. Better uniformity and enhanced mechanical qualities are guaranteed by this continuous casting technique for the tubes.

Annealing

Metal is heated above the point of re-crystallization and cooled to room temperature during the annealing process. The molecular bonds in metal tighten when it is shaped, making it rigid. The metal is put through an annealing process to regain its ductility.

Sinking Process

Tube sinking is a drawing technique that reduces the diameter of tubes. In this drawing technique, a tube is run through a die without the need of a mandrel. Good inner surface quality is not ensured when using a mandrel. The die angel determines the integrity of the outer surface. The die being used produces a uniform surface. A tube can be significantly smaller than it was originally. When cost is a factor, tube sinking is ideal.

Inspection and Testing

Before sending our items to our consumers, we conduct inspection procedures to verify their integrity.

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