company news about ASTM B564 UNS N08825 FLANGE

ASTM B564 UNS N08825 FLANGE: AN OUTSTANDING ENGINEERING SOLUTION

In the field of engineering, flanges play a crucial role in connecting pipes, valves, pumps and other equipment to form a complete piping system. Among various types of flanges, ASTM B564 UNS N08825 flange stands out due to its excellent performance and wide - range applications.

1. Material Overview
ASTM B564 UNS N08825 is a nickel - iron - chromium alloy. It has a chemical composition of C ≤ 0.05, Si ≤ 0.50, Mn ≤ 1.00, S ≤ 0.030, P ≤ 0.030, Cr = 19.5 - 23.5, Ni+Co = 38.0 - 46.0, Fe as the balance, Al ≤ 0.20, Ti = 0.6 - 1.2, Cu = 1.5 - 3.0, Mo = 2.5 - 3.5. This alloy is known by different names in various regions, such as Incoloy 825 in the US, NS142 in China, NCF825 in Japan, and 2.4858 in Germany.

2. Key Properties
Corrosion Resistance
One of the most remarkable features of ASTM B564 UNS N08825 flange is its outstanding corrosion resistance. It has excellent resistance to stress - corrosion cracking, which is vital in environments where stress and corrosive agents co - exist. The high nickel content effectively prevents stress - corrosion cracking. Moreover, it shows good resistance to pitting and crevice corrosion. It can withstand the corrosion of a wide range of acids, including sulfuric acid, phosphoric acid, nitric acid and organic acids, as well as alkalis like sodium hydroxide and potassium hydroxide. This makes it suitable for use in harsh chemical environments.

Mechanical Properties
The flange exhibits good mechanical properties both at room temperature and at high temperatures up to 550°C. It has a relatively high tensile strength (σb ≥ 585Mpa) and an elongation rate (δ ≥ 30%), which ensures its reliability and durability during installation and long - term use. The ability to maintain mechanical integrity at elevated temperatures makes it suitable for applications in high - temperature industrial processes.

Oxidation Resistance
ASTM B564 UNS N08825 flange also has good oxidation resistance. It can form a stable oxide film on its surface in oxidizing environments, which protects the underlying material from further oxidation and corrosion, thus extending its service life.

3. Standards and Specifications
ASTM B564 is the standard specification for nickel alloy forgings, which provides detailed requirements for the manufacturing, inspection, and testing of UNS N08825 forgings used in flanges. This standard ensures that the flanges meet the necessary quality and performance criteria for various engineering applications. In addition, there are other related standards for different forms of UNS N08825 materials, such as ASTM B163 and ASTM B423 for seamless tubes, ASTM B704 and ASTM B705 for welded tubes.

4. Applications
Chemical Industry
In the chemical industry, ASTM B564 UNS N08825 flanges are widely used in sulfuric acid pickling plants. They are applied in heating pipes, containers, baskets, and chains, where they need to resist the strong corrosive action of sulfuric acid. In phosphoric acid production, these flanges are used in heat exchangers, evaporators, washing and dipping tubes. They can also be found in various chemical processes where different corrosive media are involved.

Marine Industry
The marine environment is highly corrosive due to the presence of saltwater. ASTM B564 UNS N08825 flanges are used in seawater - cooled heat exchangers and marine product pipeline systems. Their excellent corrosion resistance ensures the long - term reliability of these systems in the harsh marine environment.

Oil and Gas Industry
In the oil refining process, these flanges are used in air heat exchangers. They can also be used in pipelines in acidic gas environments, where they need to resist the corrosion of acidic substances in the gas.

5. Conclusion
ASTM B564 UNS N08825 flange is a high - performance engineering component with excellent corrosion resistance, good mechanical properties, and wide - ranging applications. Its ability to perform well in harsh environments makes it an ideal choice for many industries, from chemical processing to marine and oil and gas applications. As engineering requirements continue to evolve, the ASTM B564 UNS N08825 flange will undoubtedly play an even more important role in ensuring the safety and reliability of various industrial systems.