Forged duplex steel gate valve, Biphasic steel gate valve, Gate valve

Product Details

A forged steel gate valve is a type of valve where the gate plate moves vertically along the centerline of the passage. This type of valve is mainly used for cutting purposes in pipelines. The forged steel gate valve is a widely used valve, typically employed in cutting devices with a diameter of DN ≤ 50. The forged steel gate valve is quite common. 

Duplex stainless steel is a type of stainless steel that contains an equal amount of ferrite phase and austenite phase in its solid-state quenched structure, with a minimum phase content of 30%. Duplex stainless steel is formed by increasing the Cr content or adding other ferrite elements on the basis of 18-8 austenitic stainless steel. It not only has a dual structure of austenite and ferrite, but also saves Ni alloy. Due to the characteristics of the two-phase structure of duplex stainless steel, by correctly controlling the chemical composition and heat treatment process, duplex stainless steel can combine the advantages of ferritic stainless steel and austenitic stainless steel. The presence of austenite in duplex stainless steel reduces the brittleness of Cr ferrite and the tendency of crystal growth, while maintaining excellent toughness and welding performance; the presence of ferrite increases the yield strength, intergranular corrosion resistance and chloride stress corrosion resistance of austenite.

Compared with austenitic stainless steel, the advantages of duplex stainless steel are as follows: 

Firstly, the yield strength of this material is more than twice that of ordinary austenitic stainless steel, and it possesses sufficient plasticity and toughness required for forming. The wall thickness of storage or pressure vessels made of duplex stainless steel is reduced by 30-50% compared to that of ordinary austenitic steel, which is beneficial for cost reduction. 

Secondly, it possesses excellent resistance to stress corrosion cracking. Even the lowest alloy content duplex stainless steel has a higher resistance to stress corrosion cracking than austenitic stainless steel, especially in environments containing chloride ions. Stress corrosion is a major problem that ordinary austenitic stainless steel is difficult to solve. 

Thirdly, among various materials, the corrosion resistance of 2205 duplex stainless steel is superior to that of ordinary 316L austenitic stainless steel. Super duplex stainless steel has extremely high corrosion resistance and can even replace high-alloy austenitic stainless steel or corrosion-resistant alloys in certain media. 

Fourth, it has excellent resistance to local corrosion. Compared with austenitic stainless steel with similar gold content, duplex stainless steel has better wear resistance and fatigue corrosion resistance than austenitic stainless steel. 

Fifth, the linear expansion coefficient is lower than that of austenitic stainless steel and is similar to that of carbon steel. It is suitable for connection with carbon steel and has significant engineering significance, such as in the production of composite plates or linings. 

Sixth, regardless of whether it is under dynamic or static loading conditions, duplex stainless steel has a higher energy absorption capacity than austenitic stainless steel. This has practical application value for structural components in dealing with sudden accidents such as collisions and explosions.

Application fields

The F60 duplex steel has a wide range of application fields: 

The F60 duplex steel exhibits excellent corrosion resistance in neutral chloride environments and is suitable for applications in seawater treatment equipment, offshore platforms, and other fields. 

2. The F60 duplex steel can withstand high temperatures, high pressures and corrosive media, and is suitable for use in oil refining equipment, chemical equipment, chemical reaction vessels, etc. 

3. F60 duplex steel exhibits excellent corrosion resistance and stress corrosion cracking resistance during oil and gas extraction and transportation, and is suitable for use in oil and gas pipelines, storage tanks, etc. 

4. The F60 duplex steel is resistant to corrosion and wear, and is suitable for use in pulp and paper production equipment, as well as pulp transportation pipelines. 

5. The F60 duplex steel can withstand the strong acidic and alkaline environments encountered in the production process of fertilizers and urea, and is suitable for fertilizer equipment and urea production facilities. 

6. The F60 duplex steel exhibits excellent corrosion resistance in marine environments and is suitable for use in seawater treatment equipment, offshore platforms, ships, etc. 

7. F60 duplex steel can withstand high temperatures, high pressures and corrosive media, and is suitable for energy equipment, environmental protection equipment, etc. 

8. The F60 duplex steel possesses excellent hygiene properties and corrosion resistance, and is suitable for use in food equipment, pharmaceutical equipment, and other applications. 

9. The F60 duplex steel can also be used in high-strength structural components, submarine pipelines, sulfur dioxide removal systems, desalination equipment using seawater, and sulfuric acid plants, etc. 

In conclusion, F60 (2205, S32205) duplex steel has broad application prospects in multiple industrial fields. Its excellent corrosion resistance and mechanical properties make it an ideal material choice.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.