From the heart of Hamilton, New Zealand, Hemi Metals is proud to be a trusted manufacturer and supplier of specialised materials, including the exceptionally durable Duplex Steel Flat Bar. We understand that the integrity of your project starts with the quality of its components, which is why we provide flat bars that combine exceptional strength with superior corrosion resistance, offering a reliable and long-lasting solution for demanding industrial applications right here and for export markets.
This unique material gets its strength from a balanced composition of chromium, nickel, molybdenum, and nitrogen. This specific blend gives Duplex steel its renowned ‘dual-phase’ microstructure, which results in a flat bar that possesses roughly double the yield strength of standard austenitic stainless steels. This means it can handle significantly higher stress loads while also offering excellent toughness and resistance to pitting and crevice corrosion.
| Size | : | 10 mm To 100 mm Dia in 100 mm TO 6000 mm Length. |
| Standard | : | ASTM A276, A479 / ASME SA276, SA479, ASTM A789 / A789M & ASTM A928 / A928M |
| Grade | : | UNS NO. S 31803, S 32205, S 32550, S 32750, S 32760. |
| Finish | : | Bright, Polish & Black |
| End | : | Flat |
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 |
S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grade | Density | Melting point | Yield strength(0.2% offset) | Tensile strength | Elongation |
|---|---|---|---|---|---|
| S32750/S32760 | 7.8g/cm3 | 1350°C(2460°F) | PSi-80000, MPa-550 | PSi-116000, MPa-800 | 15% |
To maintain Duplex Steel Flat Bars, regularly clean them to remove debris, inspect for corrosion, and apply protective coatings if necessary. Ensure proper storage to prevent exposure to harsh chemicals or extreme conditions.
Yes, Duplex Steel Flat Bars are suitable for natural gas applications due to their excellent corrosion resistance and strength, making them ideal for pipelines and equipment exposed to natural gas environments.
Duplex Steel Flat Bars are partially magnetic due to their ferritic phase. While not as magnetic as pure ferritic steels, they may exhibit some magnetic properties, especially in certain conditions.
The remarkable properties of Duplex Steel Flat Bar make it the material of choice for challenging environments. You’ll find it performing reliably in the structural components of offshore oil and gas platforms, within the demanding circuits of chemical processing plants, and in the highly corrosive settings of desalination units and marine architecture. Its high strength-to-weight ratio also makes it ideal for heavy-duty construction, pressure vessels, and any application where both durability and weight savings are critical.
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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