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Home > Duplex Steel > Duplex Steel Pipes S31803
Maria Pipes and Tubes stands out as a reliable manufacturer and supplier of **Duplex Steel Pipes S31803**, located in Kuala Lumpur, Malaysia. We specialize in providing high-strength, corrosion-resistant piping solutions that are perfect for tough industrial settings, including offshore, petrochemical, and marine applications. Our Duplex S31803 pipes are celebrated for their exceptional mechanical properties and durability, ensuring top-notch performance in demanding environments where high pressure and aggressive chemicals are the norm. At Maria Pipes and Tubes, we take pride in manufacturing every pipe to meet international standards, guaranteeing reliability, precision, and long-lasting service in critical infrastructure and process systems.
Duplex Steel Pipes S31803 consist of approximately 22% chromium, 5% nickel, and 3% molybdenum. Providing a balanced combination of strength and corrosion resistance. They exhibit mechanical properties such as a minimum yield strength of 480 MPa and a tensile strength of 620 MPa, making them suitable for high-stress environments. The advantages of S31803 include superior resistance to pitting and stress corrosion cracking, reduced weight compared to austenitic stainless steels, and excellent weldability. These characteristics make Duplex Steel Pipes S31803 ideal for applications in the oil and gas, chemical, and marine industries.
Pipe Range : 1 / 2″ NB – 8″ NB
Outer Diameter : 6.0-630mm
Wall Thickness : 0.3mm – 50 mm
Schedules : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Length : Single Random, Double Random & Required Length
Specifications : ASTM A790 / ASME SA790
Types : Seamless / Fabricated
| Duplex | S31803 |
|---|---|
| Ni | 4.50 – 6.50 |
| Fe | 63.72 min |
| Cr | 22.0 – 23.0 |
| C | 0.030 max |
| Si | 1.00 max |
| Mn | 2.00 max |
| P | 0.030 max |
| S | 0.020 max |
| N | 0.14 – 0.20 |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669; |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
**Duplex Steel S31803 Pipes** are crafted from a nitrogen-enhanced duplex stainless steel that combines both austenitic and ferritic phases. This unique alloy boasts a high yield strength—almost double that of standard austenitic stainless steels—with a tensile strength ranging from 620 to 880 MPa. It excels in resisting pitting, crevice corrosion, and chloride stress corrosion cracking, making it an excellent choice for corrosive and marine environments. Additionally, S31803 offers good weldability and formability, maintaining its structural integrity at temperatures up to 300°C. These pipes come in seamless, welded, and fabricated forms to cater to a variety of industrial needs.
**Duplex Steel Pipes S31803** find extensive use in industries that demand a blend of high strength and outstanding corrosion resistance. In the oil and gas sector, they are essential for subsea piping, risers, and flowlines. The chemical and petrochemical industries rely on them for transporting corrosive fluids and gases. They are also utilized in desalination plants, heat exchangers, pressure vessels, and as structural components in marine and offshore platforms. Maria Pipes and Tubes is proud to supply S31803 pipes that meet the highest standards for quality and performance.
Yes, we offer custom sizes for Duplex Steel Pipes S31803 to meet your specific requirements. Our team at Maria Pipes and Tubes is committed to providing tailored solutions for all your Piping & tubing needs. For more details, contact us at sales@mariapipes.com.
Duplex Steel Pipes S31803 are widely utilized across various industries due to their excellent strength and corrosion resistance. In the oil and gas sector they are used in pipelines, heat exchangers, and subsea applications, ensuring durability in harsh environments. The chemical industry employs these pipes for transporting corrosive substances and in storage tanks. Additionally S31803 pipes are ideal for marine applications including shipbuilding and offshore structures. Where resistance to seawater corrosion is crucial. Their versatility makes them suitable for pressure vessels, heat exchangers, and other critical applications requiring high performance.
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