Neil Metals, Kolkata, India, is a well-known producer and supplier of **Duplex Steel Square Bars**, providing strong and corrosion-resistant steel products for critical industrial use. For their high strength and dependability, these square bars are produced with the application of cutting-edge technologies as well as rigorous quality checks to international standards. Neil Metals’ Duplex Steel square bars find vast applications in **offshore oil & gas, marine, petrochemical, desalination, and structural engineering** industries where superior mechanical performance and tolerance to corrosive environments are critical.
**Duplex Steel Square Bars** find most common application in grades like **Duplex 2205 (UNS S31803/S32205)** and **Super Duplex 2507 (UNS S32750/S32760)**. They contain about **22–25% Chromium**, **5–7% Nickel**, **3–4% Molybdenum**, and **Nitrogen** to give a balanced ferritic-austenitic microstructure. This gives them very good **yield strength (about double that of austenitic stainless steels)**, **tensile strength of 620–800 MPa**, and excellent resistance to **pitting, crevice corrosion**, and **chloride-induced stress corrosion cracking**, even under highly corrosive or marine 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** find applications in **heat exchangers, pressure vessels, marine fittings, offshore platforms, bridges, structural supports, water treatment plants**, and **chemical processing facilities**. Their high strength, corrosion resistance, and cost-effectiveness in structural and mechanical systems exposed to aggressive or chemically harsh environments make them an ideal choice of material. Their **excellent weldability, fatigue resistance**, and **dimensional stability** further enable reliable fabrication and long-term service life in critical structures and industrial uses.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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