Starc Metals stands out as a top-notch manufacturer and supplier of Duplex Steel Square Bars right here in Canberra, Australia. We take pride in offering high-quality duplex stainless steel products that are built for exceptional strength, corrosion resistance, and long-lasting durability. Our duplex steel square bars blend the best features of both austenitic and ferritic stainless steels, delivering impressive mechanical properties along with remarkable resistance to stress corrosion cracking and pitting. At Starc Metals, we guarantee precise dimensions, a smooth surface finish, and adherence to global standards, making our materials perfect for demanding applications in the chemical, marine, and structural sectors.
Typically, Duplex Steel Square Bars are made up of chromium (21–23%), nickel (4.5–6.5%), molybdenum (2.5–3.5%), nitrogen, and a well-balanced amount of iron. This unique dual-phase microstructure gives them double the strength of regular austenitic stainless steels, boasting a tensile strength of around 620–880 MPa and excellent resistance to chloride-induced corrosion. Plus, duplex steel is known for its high toughness, good weldability, and outstanding resistance to intergranular corrosion, making it a fantastic choice for tough, high-stress environments.
Standards : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 10 mm To 100 mm Dia in
Length : 100 mm TO 6000 mm Length.
Specifications : ASTM A276, A479 / ASME SA276, SA479
Form : Square
Finish : Bright, Polish & Black
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 |
| S31803 / S32205 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
Duplex Steel Square Bars are generally not ideal for cryogenic applications. Their performance may deteriorate at extremely low temperatures, making materials like austenitic stainless steel more suitable for such conditions.
To choose the right Duplex Steel Square Bar, consider factors such as the required strength, corrosion resistance, temperature conditions, and industry-specific demands. Ensure compatibility with your application’s mechanical and environmental requirements.
Yes, Duplex Steel Square Bars require regular inspection, especially in harsh environments. Checking for signs of corrosion, wear, or structural integrity ensures they continue performing optimally in critical applications.
You’ll find Duplex Steel Square Bars being used in a variety of applications, from marine components and heat exchangers to pressure vessels, desalination plants, chemical processing equipment, and offshore structures. They’re also popular in architectural and structural frameworks where strength and corrosion resistance are key. The square shape is perfect for precision machining, fabrication, and support tasks. With their impressive combination of strength, formability, and long-lasting durability, Duplex Steel Square Bars from Starc Metals ensure reliable performance and longevity, even in the most challenging environmental and mechanical conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Starc Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Canberra, Australia
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