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UNS N08800 Screw
QS Fastener: UNS N08800 Screw
Name: UNS N08800 Screw
Material: X10CrAlTi3220
Size: M24
Length: 3000 mm
Product Grade: A
Standard: ANSI, BSW, NF, DIN
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Material: X10CrAlTi3220
Size: M24
Length: 3000 mm
Product Grade: A
Standard: ANSI, BSW, NF, DIN
Hardness: 170-220 HB
Application: For Heat Exchangers and Piping Systems
Feature: High Temperature Corrosion Resistance
Quantity
UNS N08800 Screw is manufactured from X10CrAlTi3220 material, complying with ANSI, BSW, NF, and DIN standards. With a size of M24, a length of 3000 mm, a product grade of Class A, and a hardness of 170-220 HB, it offers exceptional high-temperature corrosion resistance. Designed specifically for heat exchangers and piping systems, it ensures stability and durability in extreme high-temperature and corrosive environments, making it an ideal choice for high-performance fasteners in industrial applications.
UNS N08800 Screw is a nickel-iron-chromium-based high-temperature alloy fastener, known for its outstanding long-term stability in high-temperature and high-pressure environments. This stability is primarily attributed to its excellent oxidation resistance, creep resistance, and microstructural stability.
Key Factors for Long-Term Stability
The long-term stability of UNS N08800 Screw relies on the following factors:
1. Oxidation Resistance: The high chromium content (19-23 wt%) forms a dense Cr₂O₃ oxide layer at high temperatures, effectively preventing further oxidation.
The long-term stability of UNS N08800 Screw relies on the following factors:
1. Oxidation Resistance: The high chromium content (19-23 wt%) forms a dense Cr₂O₃ oxide layer at high temperatures, effectively preventing further oxidation.
2. Creep Resistance: The addition of nickel and chromium enhances the alloy's high-temperature strength, allowing it to maintain stable mechanical properties under prolonged high temperatures.
3. Microstructural Stability: The austenitic structure remains stable at high temperatures, avoiding performance degradation caused by phase transformations.
4. Low Thermal Expansion Coefficient: The UNS N08800 Screw has a low thermal expansion coefficient, minimizing dimensional changes caused by thermal cycling.
Long-Term Stability Data
The mechanical properties and dimensional change rates of UNS N08800 Screw after prolonged use at high temperatures are shown in the table below:
The mechanical properties and dimensional change rates of UNS N08800 Screw after prolonged use at high temperatures are shown in the table below:
| Temperature (°C) | Time (Hours) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Dimensional Change Rate (%) | Remarks |
| 600 | 10,000 | 500 | 200 | 30 | <0.01 | Excellent mechanical and dimensional stability |
| 800 | 1,000 | 450 | 180 | 25 | <0.05 | Good mechanical and dimensional stability |
Practical Applications of UNS N08800 Screw
The long-term stability of UNS N08800 Screw makes it an ideal material for the following high-temperature and high-pressure environments:
1. Chemical Industry: Used in high-temperature reactors, heat exchangers, and piping systems, ensuring long-term stable operation.
The long-term stability of UNS N08800 Screw makes it an ideal material for the following high-temperature and high-pressure environments:
1. Chemical Industry: Used in high-temperature reactors, heat exchangers, and piping systems, ensuring long-term stable operation.
2. Oil and Gas Industry: Applied in high-temperature and high-pressure wellhead equipment and pipelines, demonstrating excellent creep and oxidation resistance.
3. Nuclear Industry: Utilized in coolant pipelines and steam generators of nuclear reactors, maintaining stability under prolonged high temperatures and pressures.
4. Power Industry: Employed in high-temperature components of gas turbines and boilers, capable of withstanding long-term high-temperature operation.
Conclusion
UNS N08800 Screw maintains stable mechanical properties and dimensional accuracy even after prolonged use at high temperatures, thanks to its excellent oxidation resistance, creep resistance, and microstructural stability. Its long-term stability at 600°C and 800°C is particularly outstanding, making it an ideal material for high-temperature and high-pressure environments in the chemical, oil and gas, nuclear, and power industries. By optimizing alloy composition, heat treatment processes, and surface treatment technologies, the long-term stability of UNS N08800 Screw can be further enhanced to meet more demanding application requirements.
UNS N08800 Screw maintains stable mechanical properties and dimensional accuracy even after prolonged use at high temperatures, thanks to its excellent oxidation resistance, creep resistance, and microstructural stability. Its long-term stability at 600°C and 800°C is particularly outstanding, making it an ideal material for high-temperature and high-pressure environments in the chemical, oil and gas, nuclear, and power industries. By optimizing alloy composition, heat treatment processes, and surface treatment technologies, the long-term stability of UNS N08800 Screw can be further enhanced to meet more demanding application requirements.
With its exceptional high-temperature corrosion resistance and long-term stability, UNS N08800 Screw is the preferred choice for high-performance fasteners in industrial applications, widely used in heat exchangers, piping systems, chemical equipment, oil and gas equipment, nuclear facilities, and power equipment.
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