Looking for high-quality duplex stainless steel pipes? Look no further than S31803 Duplex Stainless Steel Pipes. These pipes are made with the best materials and are perfect for a wide range of industrial applications. With their high corrosion resistance, exceptional strength, and durability, S31803 Duplex Stainless Steel Pipes are the perfect choice for demanding environments.
Whether you need seamless or welded pipes, we offer a wide range of options to meet your specific needs. Our pipes are available in various sizes and thicknesses, including F51 SCH 10 and F51 SCH 40 pipes. We also offer a range of fittings and accessories to ensure a perfect fit for any application.
Our high-quality pipes are made to the highest standards, ensuring that they will meet or exceed all industry requirements. Whether you're in the oil and gas or chemical processing industries, S31803 Duplex Stainless Steel Pipes are the perfect solution to your piping needs.
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S31803 stainless steel pipe is a type of duplex stainless steel that comprises two distinct crystal structures, namely austenite and ferrite. This stainless steel is known for its unique combination of properties derived from these two phases. S31803 stainless steel offers high strength, excellent corrosion resistance, and improved toughness compared to traditional stainless steels. The presence of both austenite and ferrite provides the alloy with enhanced resistance to stress corrosion cracking and pitting, making it suitable for various applications in industries such as oil and gas, chemical processing, and marine environments. The duplex structure of S31803 stainless steel pipe promotes a balanced microstructure, resulting in superior mechanical and corrosion properties.duplex stainless steel pipeSS S31803 pipes are renowned for their high content of chromium, nitrogen and molybdenum, with up to 23.0% Cr, 3.50% Mo and 0.20% N. This unique composition gives them superb performance in hostile conditions, such as high temperature, high pressure and corrosive environments. They are also impressively strong, boasting twice the strength of standard austenitic stainless steel, along with excellent weldability and impact toughness. Thanks to their duplex structure and high alloy content, SS S31803 pipes are the go-to choice for industries where reliability is key.
- ASTM A790 is a well-known standard that specifies the requirements for seamless and welded ferritic/austenitic stainless steel pipe. This standard governs the manufacturing process and characteristics of the pipe, ensuring that it meets the necessary quality and performance standards. It is widely recognized and used in various industries that utilize stainless steel pipes.
The purpose of ASTM A790 is to provide a clear and comprehensive set of guidelines for the production and distribution of ferritic/austenitic stainless steel pipes. This includes specifying the chemical composition, mechanical properties, heat treatment, and testing requirements for these pipes. By adhering to these standards, manufacturers can ensure the reliability and durability of their products.
Seamless and welded pipes covered under ASTM A790 are designed to withstand high temperatures, pressures, and corrosive environments. They are commonly used in applications where resistance to chemical corrosion and oxidation is crucial, such as in oil and gas, chemical processing, and power generation industries. These pipes are also known for their excellent strength and fatigue resistance, making them suitable for demanding and critical applications.
In summary, ASTM A790 is a widely accepted standard that outlines the specifications for seamless and welded ferritic/austenitic stainless steel pipes. It provides manufacturers, suppliers, and end-users with the necessary guidelines to ensure the production and distribution of high-quality and reliable pipes. By following this standard, the industry can ensure the safety, performance, and longevity of stainless steel pipes in various applications.
- The ASTM A789 standard specifies the requirements for both seamless and welded ferritic/austenitic stainless steel tubing used for general service. This specification outlines the materials, mechanical properties, dimensions, and tolerances for the tubing. It covers a broad range of applications where corrosion resistance and mechanical strength are essential. The ASTM A789 standard plays a crucial role in ensuring the quality and reliability of stainless steel tubing for various industrial sectors. Manufacturers and suppliers adhere to this standard to produce tubing that meets the specified criteria and performs well in general service conditions. Compliance with ASTM A789 ensures that the stainless steel tubing meets the necessary safety and performance requirements.
- ASME B36.19：Specication for stainless steel pipes
ASTM A790 UNS S31803 Pipe Specifications
| Specifications |
ASTM A 789 / ASME SA 789 ASTM A 790 / ASME SA 790 |
| Types | Seamless / Welded / EFW / Fabricated |
| Pipe Range | 1 / 2" NB - 8" NB |
| Outer Diameter | 6.0 - 630mm |
| Wall Thickness | 0.3mm – 50 mm |
| Schedules | SCH5, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, XXS. Let's rearrange the given content to create a different style of speaking: We have various types of pipe schedules available for your reference. These schedules include SCH5, SCH20, SCH30, SCH40, STD, SCH60, SCH80, XS, SCH120, SCH140, SCH160, and XXS. They are designed to cater to different pressure requirements and applications. The selection of the appropriate schedule depends on factors such as the fluid being transported, temperature, and desired strength. It's crucial to choose the right schedule to ensure a safe and efficient plumbing system. |
| Length | Single Random, Double Random & Required Length |
| Form | We offer a wide range of pipes including round, square, and rectangular pipes, as well as "U" shaped and hydraulic pipes. Our pipes are designed to meet your specific needs, whether you need to transport liquids or gas, or support heavy loads. Our round pipes are perfect for general applications and are available in a range of sizes. The square pipes are ideal for construction and engineering projects, with excellent strength and stability. Our rectangular pipes are perfect for structures and frameworks, providing a sturdy and reliable solution. "U" shaped pipes are commonly used for fluid transportation and come in a range of wall thicknesses. Lastly, our hydraulic pipes are designed for hydraulic applications and come in a variety of sizes and shapes to meet your needs. Whatever your requirements, we have the right pipes for you. |
| End | Plain End, Beveled End, Treaded |
Performance characteristics of DIN 1.4462 duplex steel pipes are worth knowing. By rearranging the given information and ensuring that the content is based on the original text, I can provide a highly similar alternative:
The performance characteristics of DIN 1.4462 duplex steel pipes make them a valuable choice in various applications. These pipes are known for their exceptional properties and durability.
One of the key advantages of DIN 1.4462 duplex steel pipes is their excellent corrosion resistance. They exhibit resistance to various corrosive environments, including saltwater, acids, and alkaline solutions. This makes them ideal for use in industries such as oil and gas, chemical processing, and marine applications.
Moreover, DIN 1.4462 pipes offer outstanding mechanical properties. They have high strength, which allows them to withstand heavy loads and pressure. This strength is combined with good ductility, providing flexibility and preventing brittleness. As a result, these pipes can endure demanding conditions without compromising their performance.
Another notable characteristic of DIN 1.4462 duplex steel pipes is their resistance to stress corrosion cracking. This property makes them suitable for applications subjected to high levels of stress and corrosive environments. It ensures the integrity and longevity of the pipes, minimizing the risk of failure or leaks.
Furthermore, these pipes possess good weldability and formability. They can be easily fabricated into various shapes and sizes, enabling customization to specific project requirements. The ease of welding allows for efficient installation and reduces the overall costs associated with pipe manufacturing and assembly.
In summary, DIN 1.4462 duplex steel pipes offer exceptional performance characteristics, including excellent corrosion resistance, high strength, resistance to stress corrosion cracking, and good weldability. These features make them a reliable and cost-effective choice for a wide range of industrial applications.
2. Improved Corrosion Resistance: When subjected to high-temperature chloride environments, austenitic stainless steel pipes can experience stress corrosion cracking. However, the duplex microstructure of ASTM A790 UNS S31803 pipes offers better resistance to such corrosion, making them superior to 304L and 316L austenitic stainless steel. In environments like oil wells where hydrogen sulfide and chloride are present, the risk of stress corrosion cracking increases. With SS UNS S31803 round pipes, this is not a concern. Thanks to their duplex steel properties, they provide superior corrosion resistance in highly demanding environments.
2. Intergranular corrosion resistance: Duplex structure and low carbon content make ASTM A790 UNS S31803 seamless pipes very good in intergranular corrosion resistance. Its composition ensures the reformation of the austenitic iron phase in the heat-affected zone after welding, greatly reducing the risk of carbide and nitride precipitation at grain boundaries.
3. Erosion and corrosion resistance: S31803 Duplex stainless steel pipe has high strength and good impact toughness, so ASME SA790 UNS S31803 welded pipes have excellent erosion and corrosion resistance. Beneficial in environments where particulate-laden fluids are abrasive to structures, such as pipeline systems entrained with sand and salt crystals. High mechanical strength and very good corrosion resistance give duplex steel DIN 1.4462 pipe a high corrosion fatigue strength.
4. Good weldability: SS S31803 EFW pipes have good weldability similar to other stainless steel types, low thermal expansion reduces residual stress after welding. When welding S31803 duplex stainless steel pipe, using a duplex electrode similar to the parent steel, the arc welding process is suitable, but oxyacetylene welding is not recommended.
S31803 Stainless Steel Pipe Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | EN |
| Duplex S31803 | 1.4462 | S31803 | X2CrNiMoN22-5-3 |
Chemical Composition of Duplex Stainless Steel S31803 Pipes
| Grade | S31803 |
| C | 0.03max |
| Mn | 2.00max |
| P | 0.03max |
| S | 0.02max |
| Si | 1.00max |
| Ni | 4.5–6.5 |
| Cr | 21.0–23.0 |
| Mo | 2.5–3.5 |
| N | 0.08–0.20 |
| Cu | - |
ASME SA790 UNS S31803 Pipe Mechanical Properties
| Mechanical properties | S31803 |
| Tensile, min, ksi[MPa] | 90 [620] |
| Yield, min, ksi[MPa] | 65 [450] |
| Elongation, %(min) | 25 |
| Hardness, HB（max） | 290 |
S31803 Duplex Stainless Steel Pipe Physical Properties
| Density (g/cm 3) | 7.805 | |
| Elastic Modulus (GPa) | 190 | |
| Mean Coefficient of Thermal Expansion (m/m/°C) | 0-100°C | 13.7 |
| 0-315°C | 14.2 | |
| 0-538°C | – | |
| Thermal Conductivity (W/m.K) | at 100°C | 19 |
| at 500°C | – | |
| Specific Heat 0-100°C (J/kg.K) | 418 | |
| Electrical Resistivity (n.m) | 850 | |
S31803 Duplex Stainless Steel Pipe Application Fields
- Pressure vessels, high-pressure storage tanks, high-pressure pipelines, heat exchangers.
- Oil and gas pipelines, heat exchanger fittings.
- Sewage treatment system.
- Pulp and paper industry classifiers, bleaching plants, storage and handling systems.
- Rotary shafts, press rolls, blades, impellers, etc. in high-strength and corrosion-resistant environments.
- Food processing equipment
ASTM A790 UNS S31803 Pipe Quality Assurance
HT PIPE is a professional UNS S31803 pipe suppliers, the company has passed ISO9001: 2000 quality management system certification and API quality certification system certification. High-quality products and first-class service are well received by foreign customers. The unique diversified production line can provide you with a package service, you can buy all complicated products from us at one time. What's more, our sufficient material inventory and regular product inventory can ensure that you receive satisfactory products in the shortest possible time. Please feel free to contact us for UNS S31803 pipe price and more information.
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