Starc Metals stands out as a top-notch manufacturer and supplier of Duplex Steel S31803 Forgings right here in Canberra, Australia. We take pride in offering high-quality duplex stainless steel products that are designed for exceptional strength, corrosion resistance, and durability. Our Duplex Steel S31803 forgings are crafted using cutting-edge forging techniques, ensuring they boast excellent mechanical integrity, precise dimensions, and robust structural toughness. We provide reliable solutions for demanding sectors like oil & gas, petrochemical, marine, and power generation, where components need to perform consistently under high pressure, stress, and harsh environments.
When it comes to the composition of Duplex Steel S31803 Forgings, you can typically find chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), nitrogen, and iron. This unique dual-phase microstructure of austenite and ferrite gives it remarkable strength—almost double that of standard austenitic stainless steels—and exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion. These forgings showcase a tensile strength of about 620–880 MPa, good impact toughness, and impressive weldability, even in thicker sections. This perfect blend of properties makes Duplex Steel S31803 a go-to choice for critical engineering applications.
| 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 |
The maximum operating temperature for Duplex Steel S31803 forgings is typically around 300°C (572°F). Beyond this temperature, the material may experience reduced strength and susceptibility to stress corrosion cracking.
Duplex Steel S31803 forgings are available in various sizes, including diameters ranging from 10 mm to 800 mm, and shapes like round, square, billets, blocks, and custom configurations, based on application needs.
Yes, S31803 Duplex Steel forgings are highly resistant to corrosion, especially in chloride-rich environments. They offer excellent protection against pitting, crevice, and stress corrosion cracking, making them ideal for harsh industrial applications.
You’ll find Duplex Steel S31803 Forgings in a variety of applications, including pressure vessels, heat exchangers, valves, flanges, pump components, and marine equipment. They’re also widely used in chemical processing, desalination plants, and offshore oil drilling structures, thanks to their outstanding resistance to chloride-induced corrosion. With their combination of high strength, good ductility, and superior corrosion resistance, these forgings ensure long-lasting performance even in the toughest conditions. Starc Metals’ Duplex Steel S31803 Forgings deliver reliable quality, longevity, and efficiency for industries that demand durable and high-performance forged components.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Starc Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Canberra, Australia
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