George Metals, located in Houston, USA, stands out as a trusted manufacturer and supplier of Duplex Steel S31803 Forgings, specifically crafted for demanding applications that need exceptional mechanical strength and resistance to corrosion. S31803 is the pioneering duplex grade, boasting a well-balanced microstructure of austenite and ferrite, which delivers remarkable protection against pitting, crevice corrosion, and chloride stress corrosion cracking. At George Metals, you’ll find a diverse array of forged shapes, including shafts, discs, rings, flanges, and custom components, all produced in line with international standards like ASTM A182. These forgings find their place in various sectors, including offshore, petrochemical, pulp & paper, desalination, and marine engineering.
Duplex Steel S31803 Forgings from George Metals are composed of roughly 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, and 0.08–0.20% nitrogen, with iron as the primary element. This blend guarantees outstanding corrosion resistance and mechanical properties. S31803 boasts a yield strength of at least 450 MPa, a tensile strength of about 620 MPa, and impressive ductility and impact resistance, even in sub-zero temperatures. The alloy undergoes solution annealing and water quenching to stabilize its duplex structure, boosting its performance in both oxidizing and reducing environments, particularly in chloride-rich settings.
| Specifications | ASTM A182, ASME SA182 |
|---|---|
| Standard | DIN, ASTM, BS and all International Standards |
| Flat bar blocks | up to 27″ width and 15,000 lbs |
| Cylinders and sleeves | up to 50″ maximum O.D. and 65″ maximum length |
| Discs and hubs | up to 50″ diameter and 20,000 lbs |
| Rolled, hand forged or mandrel forged rings | up to 84″ maximum O.D. and 40″ maximum length |
| Rounds, shafts and step shafts | up to 144″ maximum length and 20,000 lbs |
| Forging Types | Impression Die Forging, Open Die Forging, Seamless Rolled Forging, Hot Forging, Cold Forging, Open die hammer forging, Impression die drop forging, Closed Die Forging, Press Forging, Upset Forging, Compression Forging, Swaging, Rotary Forging, Roll forging. |
| 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 |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex Steel S31803 | 1.4462 | S31803 |
George Metals’ Duplex Steel S31803 Forgings are employed across a range of industries that demand durability in corrosive and high-stress situations. You’ll find them in heat exchangers, pump shafts, flanges, pressure vessels, marine hardware, and valve components within sectors like oil & gas, desalination, chemical processing, and water treatment. Thanks to its dual-phase structure, S31803 offers enhanced fatigue strength and corrosion resistance compared to conventional stainless steels, especially in brackish water, seawater, and acidic conditions. With its impressive strength-to-weight ratio, it’s a top choice for demanding applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George 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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