Recommend Products
Name: Fujian Monel 400 Double End Stud Material: Monel 400 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: Resistant to hydrofluoric acidQS Fastener: Monel 400 Double End Stud
Name: Inconel 625 Double End Stud Material: Inconel 625 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 625 Double End Stud
Name: Xiamen Inconel 600 High Strength Fastener Material: Inconel 600 Standard: ASME Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 600 High Strength Fastener
Name: Inconel 600 Stud Bolt Putian Material: Inconel 600 Standard: ASME B18.2.1 Size: 5/16 to 4 inch Length: 30 to 1000 mm Class: 12.9 Feature: High Yield Strength, Durable Strength and Corrosion ResistanceQS Fastener: Inconel 600 Stud Bolt
UNS N08811 Special Fastener
QS Fastener: UNS N08811 Special Fastener
Name: UNS N08811 Special Fastener
Material: W.Nr.1.4959
Size: M6 to M100
Length: 30 to 3000mm
Product Grade: A
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: W.Nr.1.4959
Size: M6 to M100
Length: 30 to 3000mm
Product Grade: A
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
UNS N08811 Special Fastener: A High-Performance Solution for Demanding Applications
UNS N08811 Special Fastener is manufactured from high-quality W.Nr.1.4959 material, with a product grade of Class A. It is available in sizes ranging from M6 to M100 and lengths from 30 mm to 3000 mm, catering to diverse application needs. This fastener exhibits an elongation rate of up to 35%, demonstrating exceptional toughness and durability. Compliant with ANSI and DIN international standards, it offers outstanding high-temperature corrosion resistance, excellent stress corrosion cracking resistance, and superior machinability.
UNS N08811 Special Fastener is a nickel-iron-chromium alloy fastener. By adding titanium (Ti) and aluminum (Al) and optimizing its chemical composition, its creep resistance is significantly enhanced.
1. Mechanism Analysis of Creep Resistance in UNS N08811 Special Fastener
1.1 Grain Boundary Strengthening
The addition of titanium (Ti) and aluminum (Al) in UNS N08811 Special Fastener forms the γ' phase (Ni₃(Al,Ti)) at high temperatures. This phase exhibits exceptional thermal stability, effectively pinning grain boundaries and preventing grain boundary sliding, thereby improving the alloy's creep resistance.
1.1 Grain Boundary Strengthening
The addition of titanium (Ti) and aluminum (Al) in UNS N08811 Special Fastener forms the γ' phase (Ni₃(Al,Ti)) at high temperatures. This phase exhibits exceptional thermal stability, effectively pinning grain boundaries and preventing grain boundary sliding, thereby improving the alloy's creep resistance.
1.2 Solid Solution Strengthening
The solid solution strengthening effect of nickel (Ni) and chromium (Cr) enhances the matrix strength of the alloy, while the addition of iron (Fe) further optimizes its high-temperature stability.
The solid solution strengthening effect of nickel (Ni) and chromium (Cr) enhances the matrix strength of the alloy, while the addition of iron (Fe) further optimizes its high-temperature stability.
1.3 Carbide Precipitation
The carbon (C) in UNS N08811 Special Fastener combines with titanium (Ti) to form TiC carbides, which precipitate at grain boundaries and within grains, further enhancing the alloy's creep resistance.
The carbon (C) in UNS N08811 Special Fastener combines with titanium (Ti) to form TiC carbides, which precipitate at grain boundaries and within grains, further enhancing the alloy's creep resistance.
1.4 High-Temperature Stability
The optimized chemical composition of UNS N08811 Special Fastener ensures stable microstructures at high temperatures, preventing grain coarsening and phase transformation, thereby maintaining its creep resistance.
The optimized chemical composition of UNS N08811 Special Fastener ensures stable microstructures at high temperatures, preventing grain coarsening and phase transformation, thereby maintaining its creep resistance.
2. Experimental Data and Performance of UNS N08811 Special Fastener
2.1 Creep Rupture Strength
The creep rupture strength of UNS N08811 Special Fastener at high temperatures is significantly superior to that of ordinary stainless steel and low-alloy steel. Below are typical data:
2.1 Creep Rupture Strength
The creep rupture strength of UNS N08811 Special Fastener at high temperatures is significantly superior to that of ordinary stainless steel and low-alloy steel. Below are typical data:
| Temperature (°C) | Stress (MPa) | Creep Rupture Time (hours) |
| 600 | 100 | >10,000 |
| 700 | 50 | >5,000 |
| 800 | 25 | >1,000 |
| 900 | 10 | >500 |
2.2 Creep Rate
The creep rate of UNS N08811 Special Fastener at high temperatures is extremely low, demonstrating excellent creep resistance. Below are typical data:
The creep rate of UNS N08811 Special Fastener at high temperatures is extremely low, demonstrating excellent creep resistance. Below are typical data:
| Temperature (°C) | Stress (MPa) | Creep Rate (%/hour) |
| 600 | 100 | <0.001 |
| 700 | 50 | <0.005 |
| 800 | 25 | <0.01 |
| 900 | 10 | <0.05 |
2.3 Comparative Data
Compared to ordinary stainless steel (e.g., 304, 316) and low-alloy steel, UNS N08811 Special Fastener exhibits significantly superior creep resistance:
Compared to ordinary stainless steel (e.g., 304, 316) and low-alloy steel, UNS N08811 Special Fastener exhibits significantly superior creep resistance:
| Material | Temperature (°C) | Stress (MPa) | Creep Rupture Time (hours) |
| UNS N08811 | 700 | 50 | >5,000 |
| 304 Stainless | 700 | 50 | <500 |
| 316 Stainless | 700 | 50 | <1,000 |
| Low-Alloy Steel | 700 | 50 | <100 |
3. Summary of Creep Resistance in UNS N08811 Special Fastener
| Performance Metric | UNS N08811 Special Fastener Performance | Description |
| Creep Rupture Strength | Significantly superior to ordinary stainless steel | >5,000 hours at 700°C, 50 MPa |
| Creep Rate | Extremely low, <0.01 %/hour at high temperatures | <0.01 %/hour at 800°C, 25 MPa |
| High-Temperature Stability | Excellent, stable microstructure | No grain coarsening under prolonged high temperatures |
| Application Fields | Chemical, nuclear, oil & gas, power | Widely used in high-temperature and high-pressure environments |
4. Conclusion
By adding titanium (Ti) and aluminum (Al) and optimizing its chemical composition, UNS N08811 Special Fastener significantly enhances its creep resistance. Its exceptional creep rupture strength, extremely low creep rate, and high-temperature stability make it an ideal material choice for applications in chemical, nuclear, oil & gas, and power industries.
By adding titanium (Ti) and aluminum (Al) and optimizing its chemical composition, UNS N08811 Special Fastener significantly enhances its creep resistance. Its exceptional creep rupture strength, extremely low creep rate, and high-temperature stability make it an ideal material choice for applications in chemical, nuclear, oil & gas, and power industries.
UNS N08811 Special Fastener, with its outstanding toughness and durability, combined with the high-temperature creep resistance of Incoloy 800HT, serves as an ideal fastening solution for high-temperature and high-pressure environments.
Send Message
