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
| Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | N (%) | Fe (%) |
| S22253 | ≤0.03 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.1-0.2 | Bal. |
| S22053 | ≤0.03 | 19.0-22.0 | 4.5-6.5 | 3.0-5.0 | 0.1-0.2 | Bal. |
| S25203 | ≤0.03 | 20.0-22.0 | 4.5-6.5 | 3.0-5.0 | 0.1-0.2 | Bal. |
| S22553 | ≤0.03 | 20.0-22.0 | 4.5-6.5 | 3.0-5.0 | 0.1-0.2 | Bal. |
| S22583 | ≤0.03 | 20.0-22.0 | 4.5-6.5 | 3.0-5.0 | 0.1-0.2 | Bal. |
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
| S22253 | ≥450 | ≥620 | ≥25 | ≤320 |
| S22053 | ≥450 | ≥620 | ≥25 | ≤320 |
| S25203 | ≥450 | ≥620 | ≥25 | ≤320 |
| S22553 | ≥450 | ≥620 | ≥25 | ≤320 |
| S22583 | ≥450 | ≥620 | ≥25 | ≤320 |
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.
TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and
trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and
credibility among domestic and foreign customers.
The company's production plant covers an area of over 10,000 square meters, with an annual production
capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.
The group holds shares in more than ten domestic production entities, whose main products include
seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.
Over the past 30 years, the company has been gradually developing new technologies and materials to meet
the growing needs of customers and various diversified needs, exporting to more than 56 countries and still
increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.
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.
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GB/T 21833.3 S22253 Duplex Stainless Steel Pipe Seamless Austenitic Stainless Steel Tubes For Oil Images
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