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Harsh Metalloys, a prominent manufacturer and supplier located in Mumbai, India, specializes in providing top-notch Stainless Steel 321/321H Sheets and Plates. These products are perfect for applications that require outstanding resistance to heat and intergranular corrosion. SS 321 is a titanium-stabilized austenitic stainless steel, while SS 321H is its high-carbon counterpart, offering enhanced strength at elevated temperatures. Manufactured according to ASTM A240 standards, these sheets and plates come in a variety of sizes, finishes, and thicknesses. They are commonly used in high-temperature settings like thermal processing, aerospace, chemical plants, and power generation, thanks to their stability, weldability, and impressive durability.
Stainless Steel 321/321H Sheets and Plates are composed of 17–19% Chromium, 9–12% Nickel, and are stabilized with Titanium (at least five times the carbon content) to prevent carbide precipitation. SS 321H has a higher carbon content (up to 0.10%) to improve creep resistance and high-temperature strength. These materials boast a tensile strength ranging from 515 to 750 MPa and a yield strength of about 205 MPa. They also show excellent resistance to oxidation up to 870°C and maintain their structural integrity even under prolonged heat exposure. Both grades are non-magnetic in their annealed state and are highly formable and weldable.
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 % |
Contact us to get a quick quote for your requirement.
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.
Harsh Metalloys 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 Sheet and Plates are extensively used in applications involving continuous and intermittent service at elevated temperatures. Common uses include furnace linings, thermal shields, exhaust systems, expansion joints, heat exchangers, and boiler components. These materials are ideal for the chemical, petrochemical, aerospace, and power generation industries. Their resistance to intergranular corrosion after welding makes them suitable for welded equipment exposed to aggressive environments. SS 321H’s higher carbon content is preferred in high-pressure, high-temperature systems, offering enhanced strength and durability. Their combination of thermal resistance, formability, and corrosion protection ensures reliable performance in demanding conditions.
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