Home > Duplex Steel > Duplex Steel S31803 Sheet and Plates
At Themban Nickel Alloys, a premier manufacturer and distributor based in Cape Town , Cape Town, we specialize in providing top-grade Duplex Steel S31803 sheets and plates. Renowned for their exceptional strength, corrosion resistance, and durability, our Duplex Steel products are designed to meet the rigorous demands of industries such as construction, marine, and chemical processing. With a commitment to quality and customer satisfaction, we ensure that our sheets and plates adhere to the highest standards, making them ideal for a wide range of applications. Trust Themban Nickel Alloys for reliable, high-performance Duplex Steel solutions tailored to your needs.
If you’re looking for top-notch Duplex Steel S31803 Sheets and Plates, Themba Nickel Alloys in Cape Town, Cape Town, has got you covered. They’re well-known for their precision engineering and strict quality control, producing sheets and plates that excel in tough environments, whether it’s corrosive conditions or high temperatures. These Duplex Steel S31803 products are designed to offer outstanding corrosion resistance, impressive mechanical strength, and long-lasting durability, making them perfect for demanding industrial uses. Themba Nickel Alloys is committed to ensuring that all their products meet international standards, catering to industries like chemical, petrochemical, marine, and power generation around the globe.
Specifications : ASTM A240 / ASME SA240
Dimensions : ASTM, ASME, and API
Width : 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Thickness : 4mm-100mm
Length : 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface Finish : 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, chequered, embossed, hairline, sand blast, Brush, etching, Hot rolled plate (HR), Cold rolled sheet (CR), SATIN (Met with Plastic Coated) etc
Hardness : Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Form : Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.
| 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 |
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
The composition of their Duplex Steel S31803 Sheets and Plates includes iron (the balance), chromium (21%), nickel (5–6.5%), molybdenum (2.5–3%), along with trace amounts of nitrogen, manganese, and silicon. This unique blend gives them remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in environments with chlorides and oxidizing agents. Plus, these sheets and plates boast excellent mechanical properties, featuring a tensile strength of about 620–880 MPa and a yield strength of 450–620 MPa, along with high toughness, ductility, and fatigue resistance, ensuring they perform reliably even under extreme temperatures, pressures, and chemical exposure.
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You’ll find Duplex Steel S31803 Sheets and Plates being used across various industries that demand materials that are both corrosion-resistant and high-strength. They’re perfect for applications like chemical processing equipment, oil and gas platforms, desalination plants, heat exchangers, marine and offshore structures, and power generation systems. These sheets and plates maintain their structural integrity, resist scaling and deformation, and promise long-term durability in aggressive environments. With Themba Nickel Alloys’ Duplex Steel S31803 Sheets and Plates, you can count on safe, high-performance, and reliable solutions, making them a go-to choice for critical industrial applications worldwide.
