Luois Metals stands out as a trusted manufacturer and supplier of **Duplex Steel S31803 Bars and Rods**, proudly operating from our Houston, USA facility. We specialize in high-strength, corrosion-resistant duplex stainless steel products that are perfect for tough industrial settings. Grade S31803, also referred to as UNS S31803 or Duplex 2205, is a nitrogen-enhanced duplex alloy that delivers an impressive mix of mechanical strength and corrosion resistance. At Luois Metals, we offer these bars and rods in a variety of sizes and finishes to cater to critical applications in industries like oil & gas, marine, chemical processing, and structural engineering.
**Duplex Steel S31803 Bars and Rods** feature a well-balanced microstructure of austenite and ferrite, typically comprising about 22% chromium, 5–6% nickel, and 3% molybdenum. This dual-phase structure not only provides significantly higher yield strength compared to standard austenitic stainless steels but also offers outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion—especially in environments rich in chlorides. Additionally, the alloy boasts good weldability and formability, making it an excellent choice for both fabrication and structural load-bearing components in corrosive conditions.
| Standard | ASTM A276, ASME SA276 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex S31803 | S31803 | 1.4462 |
Yes, Duplex Steel S31803 rods offer excellent corrosion resistance, particularly against pitting, crevice, and stress corrosion. They are ideal for harsh environments, including marine and chemical applications.
Duplex Steel S31803 bars perform well in high-temperature environments, maintaining strength and resistance to oxidation. They are suitable for applications up to approximately 300°C (572°F).
Yes, Duplex Steel S31803 bars can be customized in size and length to meet specific project requirements. Customization ensures flexibility for various industrial applications.
These bars and rods find extensive use in heat exchangers, pressure vessels, offshore platforms, chemical tanks, and seawater piping systems. Their durability and resistance to harsh environments make them a smart, cost-effective choice for applications requiring long-term performance and strength. Luois Metals supplies **Duplex Steel S31803 Bars and Rods** in custom lengths, diameters, and surface finishes, all while adhering to international standards like ASTM A276 and ASTM A479. We are committed to providing top-quality materials, complete traceability, and prompt delivery for all your duplex stainless steel requirements.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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