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Incoloy 800HT Stud Bolt
QS Fastener: Incoloy 800HT Stud Bolt
Name: Incoloy 800HT Stud Bolt
Material: UNS N08811
Product Grade: A
Size: M6 to M100
Length: 30 to 800 mm
Elongation: 35%
Standard: ANSI, DIN
Feature: High Temperature Corrosion Resistance, Good Resistance to Stress Corrosion, Good Processability
Application: For Nitric Acid condenser, Steam Heating Tube, Heating Element Tube, The Temperature of 500℃ Environment
Material: UNS N08811
Product Grade: A
Size: M6 to M100
Length: 30 to 800 mm
Elongation: 35%
Standard: ANSI, DIN
Feature: High Temperature Corrosion Resistance, Good Resistance to Stress Corrosion, Good Processability
Application: For Nitric Acid condenser, Steam Heating Tube, Heating Element Tube, The Temperature of 500℃ Environment
Quantity
Incoloy 800HT Stud Bolt is manufactured from UNS N08811 material, with sizes ranging from M6 to M100 and lengths from 30 mm to 800 mm. It exhibits an elongation rate of up to 35% and complies with ANSI and DIN international standards. This product offers excellent high-temperature corrosion resistance, stress corrosion cracking resistance, and machinability, making it suitable for applications such as nitric acid condensers, steam heating tubes, heating element tubes, and environments up to 500°C. It ensures the safety and reliability of equipment under extreme conditions, making it an ideal choice for industries such as chemical and energy.
Incoloy 800HT Stud Bolt is a nickel-iron-chromium alloy. Through optimized chemical composition and microstructure design, it maintains stable mechanical properties and dimensional accuracy even after prolonged use at high temperatures.
1. Mechanism Analysis of Long-Term Stability
1.1 Microstructural Stability
By adding titanium (Ti) and aluminum (Al), Incoloy 800HT Stud Bolt forms the γ' phase (Ni₃(Al,Ti)) at high temperatures. This phase exhibits exceptional thermal stability, effectively inhibiting grain coarsening and phase transformation, thereby maintaining the alloy's microstructural stability.
1.1 Microstructural Stability
By adding titanium (Ti) and aluminum (Al), Incoloy 800HT Stud Bolt forms the γ' phase (Ni₃(Al,Ti)) at high temperatures. This phase exhibits exceptional thermal stability, effectively inhibiting grain coarsening and phase transformation, thereby maintaining the alloy's microstructural stability.
1.2 Carbide Precipitation
The carbon (C) in the alloy combines with titanium (Ti) to form TiC carbides, which precipitate at grain boundaries and within grains. These carbides pin grain boundaries, preventing grain boundary migration, and thus maintaining the dimensional accuracy of Incoloy 800HT Stud Bolt.
The carbon (C) in the alloy combines with titanium (Ti) to form TiC carbides, which precipitate at grain boundaries and within grains. These carbides pin grain boundaries, preventing grain boundary migration, and thus maintaining the dimensional accuracy of Incoloy 800HT Stud Bolt.
1.3 Oxidation Resistance
The chromium (Cr) in Incoloy 800HT Stud Bolt forms a dense Cr₂O₃ oxide layer at high temperatures, effectively preventing further oxidation and maintaining the alloy's surface integrity and mechanical properties.
The chromium (Cr) in Incoloy 800HT Stud Bolt forms a dense Cr₂O₃ oxide layer at high temperatures, effectively preventing further oxidation and maintaining the alloy's surface integrity and mechanical properties.
1.4 Creep Resistance
Through optimized chemical composition and microstructure, Incoloy 800HT Stud Bolt exhibits excellent creep resistance, ensuring stable mechanical properties and dimensional accuracy under prolonged high-temperature conditions.
Through optimized chemical composition and microstructure, Incoloy 800HT Stud Bolt exhibits excellent creep resistance, ensuring stable mechanical properties and dimensional accuracy under prolonged high-temperature conditions.
2. Experimental Data and Performance
2.1 Mechanical Property Stability
Incoloy 800HT Stud Bolt maintains stable mechanical properties even after prolonged use at high temperatures. Below are typical data:
2.1 Mechanical Property Stability
Incoloy 800HT Stud Bolt maintains stable mechanical properties even after prolonged use at high temperatures. Below are typical data:
| Temperature (°C) | Time (hours) | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| 600 | 10,000 | 550 | 220 | 35 |
| 700 | 5,000 | 500 | 200 | 30 |
| 800 | 1,000 | 450 | 180 | 25 |
| 900 | 500 | 400 | 160 | 20 |
2.2 Dimensional Accuracy Stability
Incoloy 800HT Stud Bolt maintains stable dimensional accuracy even after prolonged use at high temperatures. Below are typical data:
Incoloy 800HT Stud Bolt maintains stable dimensional accuracy even after prolonged use at high temperatures. Below are typical data:
| Temperature (°C) | Time (hours) | Dimensional Change Rate (%) |
| 600 | 10,000 | <0.01 |
| 700 | 5,000 | <0.02 |
| 800 | 1,000 | <0.05 |
| 900 | 500 | <0.1 |
2.3 Comparative Data
Compared to ordinary stainless steel (e.g., 304, 316) and low-alloy steel, Incoloy 800HT Stud Bolt exhibits significantly superior long-term stability:
Compared to ordinary stainless steel (e.g., 304, 316) and low-alloy steel, Incoloy 800HT Stud Bolt exhibits significantly superior long-term stability:
| Material | Temperature (°C) | Time (hours) | Tensile Strength (MPa) | Dimensional Change Rate (%) |
| Incoloy 800HT Stud Bolt | 700 | 5,000 | 500 | <0.02 |
| 304 Stainless | 700 | 5,000 | 300 | <0.1 |
| 316 Stainless | 700 | 5,000 | 350 | <0.08 |
| Low-Alloy Steel | 700 | 5,000 | 200 | <0.2 |
3. Summary of Long-Term Stability
| Performance Metric | Incoloy 800HT Stud Bolt Performance | Description |
| Mechanical Property Stability | Remains stable under prolonged high-temperature use | Tensile strength of 500 MPa after 5,000 hours at 700°C |
| Dimensional Accuracy Stability | Low dimensional change rate under prolonged high-temperature use | Dimensional change rate <0.02% after 5,000 hours at 700°C |
| Oxidation Resistance | Excellent, forms a dense Cr₂O₃ oxide layer | No surface oxidation under prolonged high temperatures |
| Application Fields | Chemical, nuclear, oil & gas, power | Widely used in high-temperature and high-pressure environments |
4. Conclusion
Through optimized chemical composition and microstructure design, Incoloy 800HT Stud Bolt maintains stable mechanical properties and dimensional accuracy even after prolonged use at high temperatures. Its exceptional long-term stability makes it an ideal material choice for industries such as chemical, nuclear, oil & gas, and power.
Through optimized chemical composition and microstructure design, Incoloy 800HT Stud Bolt maintains stable mechanical properties and dimensional accuracy even after prolonged use at high temperatures. Its exceptional long-term stability makes it an ideal material choice for industries such as chemical, nuclear, oil & gas, and power.
Incoloy 800HT Stud Bolt, with its outstanding high-temperature corrosion resistance, stress corrosion cracking resistance, and machinability, is widely used in nitric acid condensers, steam heating tubes, heating element tubes, and environments up to 500°C, ensuring the safety and reliability of equipment under extreme conditions. Whether in chemical equipment, nuclear facilities, or oil & gas pipelines, Incoloy 800HT Stud Bolt provides reliable fastening performance, making it an ideal solution for high-temperature and high-pressure environments.
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