Based in the heart of Hamilton, New Zealand, Hemi Metals has built a strong reputation as a trusted manufacturer and supplier, specialising in the most demanding industrial applications. Our expertise shines in the production of Duplex Steel Forgings, where we combine advanced metallurgical knowledge with precision engineering. We understand that our clients need components that won’t just function, but will endure, which is why we focus on delivering forged solutions renowned for their exceptional strength and resistance to harsh environments, right here from our local facility.
Duplex steel earns its name from a balanced microstructure of austenite and ferrite, creating a material that is both tough and highly resistant to corrosion. This unique composition translates directly into superior mechanical properties, offering a yield strength that is roughly double that of standard austenitic stainless steels. Alongside this impressive strength, it maintains excellent toughness and outstanding resistance to stress corrosion cracking, making it a robust choice where both durability and longevity are critical under demanding conditions.
| 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. |
Verify duplex steel forgings' quality by checking certifications, such as ASTM or ISO standards, conducting material testing (e.g., tensile, hardness, corrosion resistance), and inspecting for consistent dimensions, surface finish, and proper labeling.
Yes, duplex steel forgings are highly resistant to corrosion due to their unique blend of austenitic and ferritic microstructures, providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.
The maximum operating temperature for duplex steel forgings typically ranges from 250°C to 300°C (482°F to 572°F), depending on the specific grade and application, to maintain optimal mechanical properties.
The remarkable strength and corrosion resistance of our Duplex Steel Forgings make them indispensable in some of the world’s toughest industries. They are the preferred choice for critical components in offshore oil and gas platforms, handling aggressive seawater and high pressures. You’ll also find them in chemical processing plants, desalination units, and pulp and paper production, where they reliably withstand corrosive chemicals and elevated temperatures. Essentially, wherever failure is not an option and equipment faces a brutal combination of stress and corrosion, our forgings provide a dependable, long-lasting solution.
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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