90 Deg 45 Deg Customized Stainless Steel Pipe Fittings According To Customer

Product Specification

• S31803 Duplex Stainless Steel: An In-depth Review

  The introduction of S31803 duplex stainless steel represents a significant leap forward in the world of metallurgy. This steel grade is characterized by its high concentrations of nitrogen, chromium, molybdenum, and nickel, which combine to create a material that seamlessly integrates the beneficial properties of austenitic and ferritic stainless steels.

  Composition and Key Properties

• Chromium (Cr): Constituting approximately 21-23%, chromium is responsible for S31803's exceptional corrosion resistance, particularly against pitting and crevice corrosion.
• Molybdenum (Mo): At 2.5-3.5%, molybdenum greatly enhances the steel's resilience in chloride-rich environments and sulfuric acid.
• Nickel (Ni): Nickel, in the range of 4.5-6.5%, stabilizes the austenitic structure, improving toughness and resilience against stress-induced corrosion cracking.
• Nitrogen (N): Nitrogen boosts the mechanical strength and elevates resistance to pitting corrosion.

• Unique Strengths

  S31803 duplex steel stands out for its exceptional yield strength, doubling that of traditional austenitic stainless steels. This high yield strength enables the design of lighter, more cost-effective structures, making it a competitive choice over other materials such as 316/317L stainless steels.

  Optimal Operating Temperatures

  S31803 performs remarkably well within the temperature range of -50°F to +600°F (-46°C to +316°C), catering to a wide array of demanding applications. While it can be used outside this range, special considerations must be given to its mechanical behavior and structural soundness, especially in welded components.

  Versatile Applications

  The unique combination of properties makes S31803 a versatile material, finding applications in diverse industries:

• Chemical Processing Equipment: Its superior chemical corrosion resistance makes it a prime choice for reactors, pipelines, and valves.
• Oil and Gas Industry: S31803 is extensively used in pipelines, separators, heat exchangers, and other critical infrastructure where corrosion resistance and high strength are paramount.
• Desalination Plants: Its ability to handle seawater processes effectively and resist chloride ion corrosion makes it a suitable material for desalination plants.
• Pulp and Paper Manufacturing: The harsh environments in pulp and paper manufacturing require materials with high resilience, making S31803 a viable option.
• Marine Engineering: The excellent corrosion resistance and high strength of S31803 make it a preferred material for marine applications such as ships, offshore platforms, and underwater equipment.

• Fabrication Considerations

  Fabricating S31803 duplex stainless steel requires strict adherence to welding and processing procedures. Due to its high strength and tendency to work-harden, low heat input welding techniques and appropriate cutting tools are recommended. Post-weld heat treatment may be necessary to relieve residual stresses and optimize mechanical properties.

  Maintenance and Care

  Proper maintenance and care are crucial for ensuring the long-term performance of S31803 duplex stainless steel. Regular inspections and cleaning of surfaces can help prevent corrosion and maintain the material's integrity. Avoiding contact with aggressive chemicals and maintaining proper pH levels in contact with the steel are also important factors to consider.

  Compliance and Standards

  S31803 duplex stainless steel is widely recognized and compliant with various international standards, including ASTM A240, ASME SA-240, and EN 1.4462. These standards ensure that the material meets rigorous quality requirements and specifications, making it suitable for use in critical applications.

  In summary, S31803 duplex stainless steel offers a unique blend of corrosion resistance, strength, and durability, making it an ideal choice for a wide range of demanding applications. Its versatility, coupled with proper fabrication techniques, maintenance practices, and compliance with international standards, guarantees its reliability and long-term performance.

• Chemical Composition

• Elbow Size

• Application

Our company can produce carbon steel, stainless steel, and alloy steel pipe fittings according to standards such as ASME/ANSI, JIS, DIN, ISO etc. The varieties include equal diameter tees, reducing tees, tees, elbows, cross, concentric reducer, eccentric reducer etc.

We provide the very best quality pipe and fittings, prompt delivery and reliable services at competitive prices.