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MERIH STAINLESS, having its office in Istanbul, Turkey, is a well-established manufacturer and supplier of high-grade Stainless Steel 321/321H Sheets and Plates. Renowned for their accurate engineering and adherence to global standards, MERIH STAINLESS offers dependable solutions for companies demanding heat-resistant and corrosion-resistant flat products. Their 321/321H sheets and plates are designed for high-temperature applications where excellent mechanical strength and structural stability are essential. With advanced processing facilities and a customer-focused approach, MERIH STAINLESS ensures each product meets rigorous quality expectations, offering dependable performance, timely delivery, and technical support to clients across the globe.
Stainless Steel 321/321H Sheets and Plates are titanium-stabilized austenitic stainless steels that resist intergranular corrosion and exhibit high performance in elevated temperature conditions. The chemical composition consists of Chromium (17–19%), Nickel (9–12%), and Titanium (≥5xC%), controlled Carbon levels—321: ≤0.08%, 321H: 0.04–0.10%. These grades offer minimum tensile strength of 515 MPa, yield strength of 205 MPa, and elongation of 40%. 321H, with a greater carbon content, offers enhanced creep strength and high-temperature strength. Both grades are stable when subjected to thermal stress, thus being well suited for uninterrupted service in the 900–1500°F (480–816°C) range.
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.
Merih 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 wide application in high-pressure, high-temperature applications in a variety of industries. Some common applications are heat exchangers, furnace parts, expansion joints, exhaust manifolds, and chemical process equipment. These grades are also used in aerospace applications, refinery piping, and thermal oxidizers where oxidation, scaling, and stress corrosion resistance are critical. 321 is well suited for processes where temperature cycling is frequent, and 321H is better suited for high-temperature service for extended periods of time. Their resistance to intergranular corrosion following welding makes them well suited for fabrication-intensive applications where post-weld annealing is impractical.
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