Chuck Metals is a reliable manufacturer and supplier of Duplex Steel S31803 Forgings right here in Singapore, catering to various industries across Pulau Ujong with robust, high-performance forged components. These Duplex S31803 forgings are celebrated for their impressive mechanical strength, outstanding corrosion resistance, and long-lasting reliability, making them perfect for tough environments like offshore, petrochemical, and chemical processing sectors. We produce our forgings in line with standards such as ASTM A182, and they come in a range of shapes, including rings, shafts, flanges, and custom parts tailored to your needs.
Duplex Steel S31803 features a well-balanced ferritic-austenitic microstructure, comprising about 22% chromium, 5–6.5% nickel, 3% molybdenum, and 0.14–0.20% nitrogen. This unique composition gives it a yield strength of around 450 MPa and a tensile strength between 620–880 MPa. These characteristics ensure high resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, along with excellent fatigue and impact resistance, even in sub-zero temperatures.
| 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.
S31803 duplex forgings find extensive use in oil & gas platforms, heat exchangers, pressure vessels, and parts for valves and pumps, as well as marine components. Their ability to endure high-pressure, corrosive, and abrasive conditions makes them a smart and reliable choice for critical applications where both strength and corrosion resistance are key.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chuck Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Singapore, Singapore
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