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Zhangzhou Incoloy 800 Fastener
QS Fastener: Zhangzhou Incoloy 800 Fastener
Name: Zhangzhou Incoloy 800 Fastener
Material: Incoloy 800
Standard: UNS N08800
Size: M24
Hardness: 170 to 220 HB
Length: 250 mm
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Material: Incoloy 800
Standard: UNS N08800
Size: M24
Hardness: 170 to 220 HB
Length: 250 mm
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Quantity
Incoloy 800 Fastener, made from UNS N08800 material, specification M24, length 250mm, hardness 170-220 HB. Specifically designed for heat exchangers and piping systems, it possesses exceptional high-temperature corrosion resistance, suitable for long-term stable connections in demanding operating conditions.
What is an Incoloy 800 Fastener? Why is it called a"High-Temperature Alloy"?
First, it is necessary to clarify a common name confusion. You may have heard of"Inconel 800", but in the fastener field, the more accurate and common name is Incoloy 800. Although both are nickel-based alloys, their chemical compositions and focuses differ. Incoloy 800 Fastener is the correct product discussed here, and its Unified Numbering System designation is UNS N08800.
An Incoloy 800 Fastener, simply put, is a connecting component such as bolts, studs, nuts, etc., manufactured from Incoloy 800 alloy. It is not ordinary steel or stainless steel, but a high-performance nickel-iron-chromium alloy. Its typical chemical composition ratios are:
Nickel (Ni): 30-35%
Chromium (Cr): 19-23%
Iron (Fe): not less than 39.5%
Nickel (Ni): 30-35%
Chromium (Cr): 19-23%
Iron (Fe): not less than 39.5%
This meticulously balanced composition grants it performance surpassing conventional materials and is the foundation for manufacturing high-performance Incoloy 800 Fastener.
Why is the Incoloy 800 Fastener called a"High-Temperature Alloy"?
The title"High-Temperature Alloy"is the highest praise summarizing the extraordinary capabilities of the Incoloy 800 Fastener in high-temperature environments. It does not merely refer to how much heat the material itself can withstand, but rather its ability to maintain high strength, excellent corrosion resistance, and superior oxidation resistance over long periods at high temperatures (typically above 600°C). Ordinary steel would rapidly soften, oxidize (scale), and even lose load-bearing capacity at these temperatures, whereas the Incoloy 800 Fastener can operate stably.
The Incoloy 800 Fastener excels as a high-temperature alloy primarily due to three core mechanisms:
1. Exceptional Oxidation and Carburization Resistance
This is its primary asset as a high-temperature alloy. At high temperatures, oxygen and carbon-bearing atmospheres aggressively attack most metals.
This is its primary asset as a high-temperature alloy. At high temperatures, oxygen and carbon-bearing atmospheres aggressively attack most metals.
Oxidation Resistance: Thanks to its high chromium content, the surface of the Incoloy 800 Fastener forms an extremely dense, stable, and strongly adherent chromium oxide protective film. This film can self-repair rapidly even if scratched, effectively preventing further inward diffusion of oxygen, akin to putting a"thermal protective suit"on every Incoloy 800 Fastener.
Carburization Resistance: In environments such as petrochemical cracking furnaces, carbon atoms can penetrate the metal interior at high temperatures, forming carbides that make the material brittle and prone to cracking. The high nickel content in the Incoloy 800 Fastener enables it to effectively resist the intrusion of carbon atoms, maintaining the material's toughness and ductility.
2. High-Temperature Strength Retention
Materials"creep"at high temperatures, meaning they deform slowly and continuously under constant stress, a primary cause of fastener failure. The Incoloy 800 Fastener, through its solution-strengthened austenitic matrix, provides excellent high-temperature strength. This means that even under prolonged high-temperature conditions, the Incoloy 800 Fastener can maintain sufficient clamping force, without relaxing, ensuring the integrity of flange seals and structural connections.
Materials"creep"at high temperatures, meaning they deform slowly and continuously under constant stress, a primary cause of fastener failure. The Incoloy 800 Fastener, through its solution-strengthened austenitic matrix, provides excellent high-temperature strength. This means that even under prolonged high-temperature conditions, the Incoloy 800 Fastener can maintain sufficient clamping force, without relaxing, ensuring the integrity of flange seals and structural connections.
3. Excellent Corrosion Resistance
Beyond high-temperature oxidation, many industrial environments involve complex chemical corrosion, such as from sulfides, chlorides, steam, etc. The combined action of chromium and nickel gives the Incoloy 800 Fastener good resistance to various forms of corrosion, including both oxidizing and reducing media.
Beyond high-temperature oxidation, many industrial environments involve complex chemical corrosion, such as from sulfides, chlorides, steam, etc. The combined action of chromium and nickel gives the Incoloy 800 Fastener good resistance to various forms of corrosion, including both oxidizing and reducing media.
Summary and Application
In summary, the reason the Incoloy 800 Fastener is revered as a"High-Temperature Alloy"is that, through its optimal nickel-chromium-iron ratio, it perfectly addresses the four core challenges in high-temperature environments: oxidation, carburization, strength degradation, and complex corrosion.
Consequently, the Incoloy 800 Fastener is widely used in critical"key locations"where safety and durability requirements are extremely high:
Heat exchangers and boiler systems: For critical connections in high-temperature flue gas and steam environments.
Chemical and petrochemical piping: Especially in cracking furnaces and reformer furnaces, resisting high temperatures and carburization.
Nuclear power industry: For key components such as steam generator tube supports.
Heat treatment equipment: Such as radiant tubes, retorts, etc.
Heat exchangers and boiler systems: For critical connections in high-temperature flue gas and steam environments.
Chemical and petrochemical piping: Especially in cracking furnaces and reformer furnaces, resisting high temperatures and carburization.
Nuclear power industry: For key components such as steam generator tube supports.
Heat treatment equipment: Such as radiant tubes, retorts, etc.
Choosing an Incoloy 800 Fastener essentially means installing a reliable"safety lock"for the long-term, safe, and stable operation of your equipment and structures in harsh high-temperature environments.
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