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Nakamura Stainless, based in Pulau Ujong, Singapore, is a well-respected manufacturer and supplier of Stainless Steel 321/321H Sheets and Plates, providing top-notch solutions for industrial applications around the globe. These sheets and plates are crafted from titanium-stabilized austenitic stainless steels, specifically designed to resist intergranular corrosion and excel in high-temperature settings. With a strong focus on advanced manufacturing techniques and a commitment to international standards, Nakamura Stainless guarantees consistent quality, strength, and reliability. Their Stainless Steel 321/321H Sheets and Plates are trusted in critical sectors like petrochemical, chemical processing, aerospace, and power generation, where durability and long-lasting performance in tough conditions are a must.
The composition of Stainless Steel 321/321H Sheets and Plates includes chromium (17–19%), nickel (9–12%), along with titanium stabilizers that help prevent carbide precipitation. The 321H grade features a higher carbon content, which enhances its creep and stress rupture strength at elevated temperatures. These materials boast a tensile strength of around 515 MPa, a yield strength of 205 MPa, and an elongation of 40%. They offer excellent toughness, oxidation resistance, and outstanding performance in high-temperature applications, making them a reliable choice for structural, thermal, and pressure-based uses in demanding environments.
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
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 | N | Ni | Ti |
| SS 321 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 5(C+N) – 0.70 max |
| SS 321H | 0.04 – 0.10 | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 19.00 | 0.10 max | 9.00 – 12.00 | 4(C+N) – 0.70 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
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These sheets contain high corrosion resistance and are available up to 1.2-12mm thickness and width up to 2000mm. They are ideal for high temperature application.
Cold rolled plates of SS 321H possess higher corrosion resistance and are available up to 0.3-6mm in thickness and up to 1500mm in width. They are perfect for applications requiring a smooth finish and high strength.
These plates provide outstanding resistance to corrosion, and come in thickness from 3mm up to 12mm and have sizes of up to 1500mm x 3000mm. Raised pattern surface increases the gripping value, thus commonly used for floor and structural work.
Perforated sheets are extremely resistant to corrosion and can be perforated from 0.5mm up to 20mm in diameter. The sheet thickness is also from 0.3mm up to 3mm. It is used in filtration and ventilation systems.
Shim sheets are resistant to corrosion with a high accuracy level. Thickness is available between 0.05mm up to 3mm, and cut-to-size service is also possible to get precise dimensions for several alignment and spacing applications.
Polished plates have excellent resistance to corrosion, and a reflective finish. These plates are manufactured in thickness range from 3mm to 50mm. The size for these plates up to 2000mm x 6000mm is ideal for aesthetic applications as well as a high-quality surface finish.
Nakamura Stainless offers an excellent customer experience along with detailed documentation of its high-quality Stainless Steel 321/321H Sheets and Plates. We deliver key documents such as the commercial invoice, packing list, fumigation certificate, heat treatment chart, quality assurance plan, and NABL-approved lab test report, making it easier to validate the authenticity and superior quality of our products for the value-added customers. Our Stainless Steel 321/321H Sheets and Plates, meanwhile, possess diversified test certificate features, ranging from MTC accordance with EN10204 /3.1B to a PMI test Certificate, radiographic test reports having 100 % and even up to third Party Inspection. Here, too the certificates explain their customer-driven activities and unwearied product quest for superior product quality.
Stainless Steel 321/321H Sheets and Plates find extensive use in industries that require heat resistance and protection against intergranular corrosion. In aerospace engineering, they are crucial for exhaust systems, jet engines, and manifolds, where high thermal stability is essential. In petrochemical and chemical facilities, they are employed in reactors, heat exchangers, and pressure vessels. Power generation units utilize them in boiler tubes and superheater components. Their corrosion resistance also makes them ideal for marine and refinery equipment. These characteristics ensure they provide long-lasting, dependable service in extreme industrial applications.
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