Based in Hamilton, New Zealand, Hemi Metals is your trusted local partner for high-quality forged components. We specialise in Duplex Steel S31803 forgings, delivering robust solutions that stand up to the toughest industrial challenges. Our commitment lies in providing reliable, locally manufactured products backed by expert knowledge. We understand the demands of New Zealand’s key industries and are dedicated to supplying forgings that ensure longevity, safety, and exceptional performance for your most critical applications, right from the heart of the Waikato region.
Duplex Steel S31803 achieves its remarkable strength by balancing a microstructure of austenite and ferrite grains. This specific composition, rich in chromium, nickel, molybdenum, and nitrogen, gives these forgings an excellent combination of high tensile strength and impressive toughness. They also offer strong resistance to stress corrosion cracking, outperforming many standard stainless steels. This makes them incredibly durable, capable of handling heavy loads and resisting deformation under pressure, which is essential for demanding mechanical parts.
| 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.
The exceptional strength and corrosion resistance of Duplex Steel S31803 forgings make them ideal for challenging environments. You’ll commonly find them in the offshore and marine sectors for components like pump shafts and valve bodies, where saltwater resistance is critical. They are also essential in chemical processing plants, oil and gas pipelines, and within the pulp and paper industry. Essentially, these forgings are the go-to choice for any application that requires a component to be both incredibly strong and highly resistant to corrosive attack, ensuring long-term reliability.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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