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Based in Chennai, India, Kunj Sheets and Plates is a reputable producer and supplier of Duplex Steel S31803 Sheets and Plates. Kunj specialises in producing high-performance stainless steel products and provides premium-grade S31803 duplex sheets and plates, which are renowned for their exceptional strength and resistance to corrosion. These goods are made to satisfy the exacting requirements of sectors like construction, petrochemicals, marine, and oil and gas. Kunj guarantees consistent performance, durability, and dependability through meticulous engineering and stringent quality control during manufacturing. Kunj is a reliable partner for duplex steel solutions in India and abroad because of its customised dimensions and quick delivery services.
About 21–23% chromium, 4.5–6.5% nickel, 2.5–3.5% molybdenum, and nitrogen make up the balanced austenitic-ferritic microstructure of Duplex Steel S31803 Sheets and Plates. Excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking is provided by this grade. Mechanical characteristics include a minimum yield strength of 450 MPa, a tensile strength of approximately 620 MPa, and a 25% elongation. S31803 is a great option for applications in harsh environments where both mechanical and corrosion resistance are necessary because of its strength, resistance to corrosion, and good weldability and formability.
| Size | : | 1/2″NB TO 4″NB IN |
| Standard | : | ASTM A182 / ASME SA182 |
| Dimensions | : | ANSI/ASME B16.11 & BS3799, etc. |
| Grade | : | UNS S31803, S32205, S2205, S32550, S32750, S32760. |
| Class | : | 2000LBS, 3000LBS, 6000LBS, 9000LBS, etc. |
| UNS S31803 | Ni | Cr | Mo | Mn | Si | C | N | S | P | Fe |
| min | 4.5 | 22.0 | 3.0 | – | – | – | 0.14 | – | – | – |
| max | 6.5 | 23.0 | 3.5 | 2.0 | 1.0 | 0.03 | 0.2 | 0.02 | 0.03 | Balance |
| Grade | S31803 |
| Density (g/cm 3) | 7.805 |
| Density (lb/in 3) | 0.285 |
| Melting Point (°C) | 1420 – 1465 |
| Melting Point (°F) | 2588 – 2669; |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Duplex Steel Sheet and Plates S31803 offer exceptional strength, corrosion resistance, and durability, making them ideal for harsh environments. With a balanced microstructure of austenite and ferrite, they provide higher resistance to stress corrosion cracking and pitting. These plates are highly resistant to chloride environments, ensuring long-lasting performance in industries like oil and gas, chemical processing, and marine applications. Their excellent weldability and formability make them versatile for various fabrication processes, while their cost-effectiveness compared to high-alloy steels makes them a popular choice for demanding applications.
| Duplex 2205 | UNS S31803 | 1.4462 | F51 |
| Thickness (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) | Length x width (mm) |
| 5 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 6 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 8 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 10 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 12 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 15 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 16 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 20 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 25 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 30 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 35 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 40 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 45 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 50 | 4000 x 2000 | 6000 x 2000 | 6000 x 2500 | 6000 x 3000 | 8000 x 2000 |
| 60 | 4000 x 2000 | ||||
| 70 | 4000 x 2000 | ||||
| 80 | 4000 x 2000 | ||||
| 90 | 4000 x 2000 | ||||
| 100 | 4000 x 2000 |
| Surface finish | Thickness (mm) | Width (mm) |
|---|---|---|
| 2B – Cold rolled, heat treated, pickled, skin passed | 0.25–8.0 | max. 2032 |
| 2D – Cold rolled, heat treated, pickled | 0.4–6.35 | max. 1524 |
| 2E – Cold rolled, heat treated, mechanically descaled | 0.4–8.0 | max. 2032 |
| 2R – Cold rolled, bright annealed | 0.25–3.5 | max. 1524 |
| 2H – Work hardened | 0.4–6.35 | max. 1524 |
| Polished, brushed | 0.5–4.0 | max. 1524 |
Duplex Steel S31803 Sheets and Plates are frequently utilised in high-stress settings where mechanical strength and resistance to corrosion are essential. In the oil and gas sector, offshore platforms, subsea pipelines, and pressure vessels are typical uses. Because of their resistance to corrosion caused by chloride, they are also utilised in heat exchangers, desalination plants, and equipment used in chemical processing. They are used in seawater systems, propeller shafts, and shipbuilding in the maritime sector. Their strength and durability are further demonstrated by their structural applications in storage tanks, bridges, and construction components. They are appropriate for long-term, economical applications due to their excellent performance in corrosive environments.
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