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UNS N07080 Special Fastener
QS Fastener: UNS N07080 Special Fastener
Name: UNS N07080 Special Fastener
Size: 5/16 to 4 inch
Product Grade: A
Length: 30 to 1000 mm
Standard: ANSI/ASTM
Material: Nimonic 80A
Tensile Strength(Rm): 930 N/mm²
Elongation: 20%
Feature: High Temperature Strength and Stability, Good Corrosion Resistance
Application: For Aerospace field, Automobile Industry, Energy Field, Chemical industry.
Size: 5/16 to 4 inch
Product Grade: A
Length: 30 to 1000 mm
Standard: ANSI/ASTM
Material: Nimonic 80A
Tensile Strength(Rm): 930 N/mm²
Elongation: 20%
Feature: High Temperature Strength and Stability, Good Corrosion Resistance
Application: For Aerospace field, Automobile Industry, Energy Field, Chemical industry.
Quantity
The UNS N07080 Special Fastener is made from high-performance Nimonic 80A material, offering exceptional high-temperature strength, stability, and corrosion resistance, with a tensile strength of 930 N/mm² and an elongation rate of 20%. Compliant with ANSI/ASTM standards, it is available in sizes ranging from 5/16 to 4 inches and lengths from 30 to 1000 millimeters. It is suitable for high-end applications in aerospace, automotive, energy, and chemical industries, providing a reliable connection solution in complex environments.
The high-temperature performance of Nimonic 80A primarily relies on its unique chemical composition and microstructure, which enable it to perform excellently under extreme high-temperature conditions. Below is a detailed analysis of the chemical composition, strengthening mechanisms, and microstructure of the UNS N07080 Special Fastener:
1. Chemical Composition and Strengthening Mechanisms
The UNS N07080 Special Fastener is a nickel-based superalloy, with its chemical composition mainly including:
- Nickel (Ni): As the matrix element, nickel provides excellent high-temperature strength and corrosion resistance, while serving as the foundation for the solid solution of other alloying elements.
- Chromium (Cr): With a content of approximately 18-21%, chromium primarily enhances oxidation and corrosion resistance. At high temperatures, chromium reacts with oxygen to form a dense Cr2O3 oxide layer, effectively preventing further oxidation and corrosion.
- Titanium (Ti): With a content of approximately 1.8-2.7%, titanium works in conjunction with aluminum to form the γ' phase (Ni3(Al,Ti)), which is a key source of the high-temperature strength of the UNS N07080 Special Fastener.
- Aluminum (Al): With a content of approximately 1.0-1.8%, aluminum, together with titanium, participates in the formation of the γ' phase, further enhancing the material's creep resistance.
- Carbon (C): With a low content (typically less than 0.1%), carbon is used to form carbides, improving the material's hardness and wear resistance.
The UNS N07080 Special Fastener is a nickel-based superalloy, with its chemical composition mainly including:
- Nickel (Ni): As the matrix element, nickel provides excellent high-temperature strength and corrosion resistance, while serving as the foundation for the solid solution of other alloying elements.
- Chromium (Cr): With a content of approximately 18-21%, chromium primarily enhances oxidation and corrosion resistance. At high temperatures, chromium reacts with oxygen to form a dense Cr2O3 oxide layer, effectively preventing further oxidation and corrosion.
- Titanium (Ti): With a content of approximately 1.8-2.7%, titanium works in conjunction with aluminum to form the γ' phase (Ni3(Al,Ti)), which is a key source of the high-temperature strength of the UNS N07080 Special Fastener.
- Aluminum (Al): With a content of approximately 1.0-1.8%, aluminum, together with titanium, participates in the formation of the γ' phase, further enhancing the material's creep resistance.
- Carbon (C): With a low content (typically less than 0.1%), carbon is used to form carbides, improving the material's hardness and wear resistance.
These elements enhance the performance of the UNS N07080 Special Fastener through the following two primary mechanisms:
- Solid Solution Strengthening: Elements such as chromium, titanium, and aluminum dissolved in the nickel matrix increase lattice distortion, hindering dislocation movement and thereby improving the material's strength and hardness.
- Precipitation Strengthening: At high temperatures, the γ' phase (Ni3(Al,Ti)) precipitates in the form of fine particles, uniformly distributed in the matrix. These particles effectively hinder dislocation movement, significantly enhancing the high-temperature strength and creep resistance of the UNS N07080 Special Fastener.
- Solid Solution Strengthening: Elements such as chromium, titanium, and aluminum dissolved in the nickel matrix increase lattice distortion, hindering dislocation movement and thereby improving the material's strength and hardness.
- Precipitation Strengthening: At high temperatures, the γ' phase (Ni3(Al,Ti)) precipitates in the form of fine particles, uniformly distributed in the matrix. These particles effectively hinder dislocation movement, significantly enhancing the high-temperature strength and creep resistance of the UNS N07080 Special Fastener.
2. High-Temperature Oxidation and Corrosion Protection
In high-temperature environments, a dense Cr2O3 oxide layer forms on the surface of the UNS N07080 Special Fastener. This oxide layer has the following characteristics:
- Stability: Cr2O3 is highly stable at high temperatures, effectively preventing further oxygen diffusion and protecting the base material from oxidation.
- Self-Healing: Even if the oxide layer is mechanically damaged, chromium quickly reacts with oxygen to reform the protective layer.
- Corrosion Resistance: In addition to oxidation resistance, the Cr2O3 layer also resists corrosion from sulfides, chlorides, and other corrosive media, extending the service life of the UNS N07080 Special Fastener.
In high-temperature environments, a dense Cr2O3 oxide layer forms on the surface of the UNS N07080 Special Fastener. This oxide layer has the following characteristics:
- Stability: Cr2O3 is highly stable at high temperatures, effectively preventing further oxygen diffusion and protecting the base material from oxidation.
- Self-Healing: Even if the oxide layer is mechanically damaged, chromium quickly reacts with oxygen to reform the protective layer.
- Corrosion Resistance: In addition to oxidation resistance, the Cr2O3 layer also resists corrosion from sulfides, chlorides, and other corrosive media, extending the service life of the UNS N07080 Special Fastener.
3. Microstructure and the Role of the γ' Phase
The microstructure of the UNS N07080 Special Fastener mainly consists of a nickel matrix and the γ' phase (Ni3(Al,Ti)). The γ' phase is an ordered face-centered cubic (FCC) structure with the following characteristics:
- High-Temperature Stability: The γ' phase remains stable at high temperatures (up to 800°C), without significant phase transformation or dissolution.
- Strengthening Effect: The γ' phase, in the form of nanoscale particles uniformly distributed in the matrix, effectively hinders dislocation movement, enhancing the strength and creep resistance of the UNS N07080 Special Fastener.
- Size and Distribution: Through appropriate heat treatment processes (such as aging), the size and distribution of the γ' phase can be controlled, further optimizing the mechanical properties of the UNS N07080 Special Fastener.
The microstructure of the UNS N07080 Special Fastener mainly consists of a nickel matrix and the γ' phase (Ni3(Al,Ti)). The γ' phase is an ordered face-centered cubic (FCC) structure with the following characteristics:
- High-Temperature Stability: The γ' phase remains stable at high temperatures (up to 800°C), without significant phase transformation or dissolution.
- Strengthening Effect: The γ' phase, in the form of nanoscale particles uniformly distributed in the matrix, effectively hinders dislocation movement, enhancing the strength and creep resistance of the UNS N07080 Special Fastener.
- Size and Distribution: Through appropriate heat treatment processes (such as aging), the size and distribution of the γ' phase can be controlled, further optimizing the mechanical properties of the UNS N07080 Special Fastener.
With its excellent chemical composition, strengthening mechanisms, and microstructure, the UNS N07080 Special Fastener performs outstandingly in high-temperature, high-pressure, and corrosive environments, making it an ideal choice for high-end applications in aerospace, energy, and chemical industries. Whether in extreme temperatures or complex working conditions, the UNS N07080 Special Fastener provides a reliable connection solution, ensuring the safety and stability of equipment.
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