GB/T 21833.3 S22253 S22053 S25203 S22553 S22583 Duplex Stainless Steel Pipe Seamless Austenitic Stainless Steel Tubes For Oil

Material

Duplex stainless steels are a family of stainless steels that contain a mixture of austenitic and ferritic phases. The grades specified in GB/T 21833.3 are designed to provide excellent corrosion resistance, high strength, and good weldability, making them suitable for various applications, particularly in the oil and gas industry.

Specification

The GB/T 21833.3 standard outlines the requirements for seamless duplex stainless steel pipes and tubes. These specifications ensure that the materials meet the necessary mechanical and chemical properties for their intended applications.

Key Features

• Corrosion Resistance: Excellent resistance to pitting and crevice corrosion.
• High Strength: Superior mechanical properties compared to standard austenitic stainless steels.
• Weldability: Good weldability with proper techniques.
• Low Thermal Expansion: Reduced thermal expansion compared to other stainless steels.
• Versatility: Suitable for various environments, including high-pressure and high-temperature applications.

Chemical Composition

Mechanical Properties

Steel Grade

The steel grades specified in GB/T 21833.3 include:

• S22253
• S22053
• S25203
• S22553
• S22583

Application

Duplex stainless steel pipes and tubes are widely used in various applications, particularly in the oil and gas industry. Common applications include:

• Oil and gas exploration and production
• Chemical processing
• Marine environments
• Desalination plants
• Heat exchangers

Possible Alternative Grades

While the specified grades are optimal for many applications, alternative grades may also be considered based on specific requirements:

• S31803: A widely used duplex stainless steel with similar properties.
• S32750: A super duplex stainless steel offering enhanced corrosion resistance and strength.
• S304: A standard austenitic stainless steel for less demanding applications.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.