Luois Metals stands out as a top manufacturer and supplier of Duplex Steel Square Bars right in Houston, USA. We pride ourselves on delivering products that blend strength, durability, and impressive corrosion resistance. Our Duplex Steel Square Bars are crafted with precision to meet international quality standards, earning a reputation for their toughness, dimensional accuracy, and outstanding performance even in the toughest environments. Thanks to a well-balanced microstructure of austenite and ferrite, these bars boast exceptional mechanical properties, making them perfect for demanding applications across marine, chemical, oil & gas, and construction industries. At Luois Metals, we guarantee a reliable supply and consistent product quality around the globe.
These Duplex Steel Square Bars are made from a mix of chromium, nickel, molybdenum, and nitrogen, which give them remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking. The duplex microstructure not only provides higher strength compared to standard austenitic stainless steels but also maintains good ductility. Mechanically, they showcase high yield strength, excellent toughness, and solid fatigue resistance. Their balanced composition ensures they are durable, easy to weld, and perform exceptionally well in corrosive and high-pressure settings.
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 utilized in various industries that require both strength and corrosion resistance. In the marine sector, they’re essential for propeller shafts, shipbuilding, and seawater handling equipment. The oil & gas industry relies on them for pipelines, offshore platforms, and pressure vessels. Chemical and petrochemical sectors use them in heat exchangers, storage tanks, and process equipment. Meanwhile, construction and engineering fields employ them in structural frameworks and heavy-duty machinery. With their unique combination of strength and corrosion resistance, Duplex Steel Square Bars are truly an excellent choice for critical applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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