Chuck Metals stands out as a top manufacturer and supplier of Duplex Steel Flat Bars in Singapore, catering to a wide range of industrial sectors throughout Pulau Ujong and Southeast Asia. Known for their remarkable strength, resistance to corrosion, and versatile performance, duplex steel flat bars are perfect for use in tough and high-stress environments. Crafted to meet standards like ASTM A276 and ASTM A479, our duplex flat bars come in various sizes and finishes, ensuring both structural integrity and machinability for industrial and engineering applications.
Typically, Duplex Steel Flat Bars contain 22–25% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, along with added nitrogen to boost strength and resistance to pitting. These bars deliver tensile strength between 600 to 900 MPa and yield strength around 450 to 620 MPa, offering nearly double the strength of regular austenitic stainless steels. Their unique dual-phase (ferritic-austenitic) structure enhances resistance to stress corrosion cracking, crevice corrosion, and fatigue, particularly in environments rich in chlorides or acids.
| 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.
Duplex Steel Flat Bars find extensive use in industries such as oil and gas, chemical processing, marine, desalination, and pulp and paper. Common applications include brackets, flanges, reinforcements, base plates, and structural supports. These bars are particularly well-suited for fabricated structures and load-bearing components that require a blend of strength, corrosion resistance, and dimensional stability, making them a cost-effective and durable choice in corrosive and mechanically demanding settings.
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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