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Nial Sheets and Plates is a trusted manufacturer and supplier of Duplex Steel S31803 Circles, proudly based in Houston, USA. We cater to a variety of industrial sectors by providing precision-engineered components. Our Duplex S31803 Circles are made from top-notch duplex stainless steel, striking a perfect balance between strength and corrosion resistance. Renowned for their outstanding mechanical properties, these circles excel in resisting stress corrosion cracking and pitting, making them perfect for use in harsh, chloride-rich environments. At Nial, we’re dedicated to delivering consistent product quality, timely deliveries, and expert technical support, which is why we’re a go-to source for duplex steel products in demanding industries.
The composition of Duplex Steel S31803 Circles includes about 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen, resulting in a well-balanced dual-phase (ferritic-austenitic) microstructure. This unique blend provides them with double the strength of austenitic stainless steels, along with excellent resistance to localized corrosion and stress corrosion cracking. Their mechanical properties boast a tensile strength of around 620–880 MPa, a yield strength of 450 MPa, and impressive elongation and impact toughness. These circles are perfect for high-load applications and tough environments where both strength and corrosion resistance are essential.
| Standard | ASTM A240, ASME SA240 |
| Dimensions | ASTM, ASME and API |
| Standard | JIS, AISI, ASTM, GB, DIN, EN, etc. |
| Thickness | 1 Mm To 100 mm. |
| Diameter | Upto 2000 Mm. |
| Circle Diameter | 3″ DIA up to 38″ DIA 1500 lbs max. |
| Circles Form | Cold Rolled, Small Flat, Industrial, Proof Machined, Perforated, Forged Steel, Cnc Finish, Polished Unique, Hot Rolled Circle.. |
| STANDARD | WERKSTOFF NR. | UNS |
| Duplex 1803 | 1.4462 | S31803 |
| 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 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Nial Sheets and Plates based in Houston, USA, is a leading supplier and stockist of high-quality metal products, including Sheets, Plates, Coils, Foils, Angles, Channels, Circles, and Slitting Coils, all offered with exceptional service and tailored to meet our customers specific requirements. With a focus on delivering superior products, we cater to a wide range of industries, providing reliable solutions for diverse applications. Our extensive inventory includes Known for our unique finishing techniques and commitment to quality. We are dedicated to ensuring customer satisfaction through dependable service and top-notch products.
Duplex Steel S31803 Circles offer several advantages, making them ideal for industrial applications. Their dual-phase microstructure provides exceptional strength and toughness, outperforming many conventional stainless steels. These circles have excellent corrosion resistance, especially against pitting, crevice corrosion, and stress corrosion cracking, even in harsh environments. They exhibit superior thermal conductivity and low thermal expansion, ensuring stability under temperature fluctuations. With high weldability and machinability, they are suitable for complex fabrication. Additionally, Duplex S31803 Circles offer a cost-effective solution due to reduced material thickness without compromising durability and performance.
Yes, we offer custom sizes for Duplex Steel S31803 Circle to meet specific project needs. Our team at Nial Sheets and Plates is dedicated to providing tailored solutions for all your requirements. For more details, contact us at sales@aaronsheetsplates.com.
Duplex Steel S31803 Circles find their place in various industries where strength, corrosion resistance, and durability are paramount. In the oil and gas sector, they’re utilized in offshore platforms, subsea systems, and piping that faces chlorides and pressure. The chemical and petrochemical industries rely on them for heat exchangers, pressure vessels, and reactor components. In marine settings, they’re used in propeller shafts and structural parts. Water treatment plants, pulp and paper processing, and construction industries also reap the benefits of their strength and longevity, making Duplex S31803 Circles a versatile choice for challenging operational conditions.
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