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Stainless Steel 347 Sheet and Plates are high-performance, niobium-stabilized austenitic stainless steel products designed to resist intergranular corrosion during high-temperature service. Saif Sheets and Plates provides top-quality SS 347 material in Muscat, Oman, supplying industries that demand durability, heat resistance, and excellent weldability. This grade is especially suitable for applications where exposure to temperatures between 425°C and 900°C may otherwise cause carbide precipitation. With its stable structure and enhanced corrosion resistance, Stainless Steel 347 is widely used in thermal systems, chemical processing equipment, and welded components. Saif Sheets and Plates ensures precise quality, long service life, and dependable performance.
Stainless Steel 347 Sheets and Plates contain 17–19% chromium, 9–13% nickel, and niobium/tantalum stabilizers that prevent carbide formation during welding and prolonged heat exposure. Carbon content remains below 0.08%, ensuring improved resistance to intergranular corrosion. The alloy provides a tensile strength of about 515 MPa, yield strength around 205 MPa, and elongation near 40%. It also offers excellent oxidation resistance up to 870°C, making it suitable for continuous high-temperature operations while maintaining mechanical stability and structural reliability.
| Specifications | : | ASTM A240 / ASME SA240 |
| Thickness | : | 4mm-100mm |
| Width | : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Length | : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc |
| Surface | : | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish | : | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| 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 | Cb | Ni | Fe |
| SS 347 | 0.08 max | 2.0 max | 1.0 max | 0.045 max | 0.030 max | 17.00 – 20.00 | 10xC – 1.10 | 9.00 – 13.00 | 62.74 min |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1454 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN |
| SS 347 | 1.4550 | S34700 | SUS 347 | – | 08Ch18N12B | – | X6CrNiNb18-10 |
| Material | Size | Thickness |
| PLATES & SHEETS | 1000 mm x 2000 mm | 0.1mm To 100 mm Thickness |
| 1220 mm x 2440 mm (4′ x 8′) | ||
| 1250 mm x 2500 mm | ||
| 1500 mm x 3000 mm | ||
| 2000 mm x 4000 mm | ||
| 2000 mm x 2000 mm |
| Surface Finish | Definition | Application |
|---|---|---|
| 2B | Those finished, after cold rolling, by heat treatment, pickling or other equivalent treatment and lastly by cold rolling to given appropriate luster. | Medical equipment, Food industry, Construction material, Kitchen utensils. |
| BA | Those processed with bright heat treatment after cold rolling. | Kitchen utensils, Electric equipment, Building construction. |
| NO.3 | Those finished by polishing with No.100 to No.120 abrasives specified in JIS R6001. | Kitchen utensils, Building construction. |
| NO.4 | Those finished by polishing with No.150 to No.180 abrasives specified in JIS R6001. | Kitchen utensils, Building construction, Medical equipment. |
| HL | Those finished polishing so as to give continuous polishing streaks by using abrasive of suitable grain size. | Building Construction. |
| NO.1 | The surface finished by heat treatment and pickling or processes corresponding there to after hot rolling. | Chemical tank, pipe |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Stainless steel 347 sheets and plates offer several advantages, including excellent resistance to intergranular corrosion, making them ideal for high-temperature applications The addition of niobium stabilizes the material and provides carbide precipitation a resistance is high, especially in the welded state. It provides excellent oxidation and scaling resistance at high temperatures, making it suitable for environmental applications such as chemical processing, power generation, aerospace industries etc. Stainless steel 347 with strength a outstanding, durable and corrosion resistance ensure long-term performance in extreme conditions, reduce maintenance costs and extend component life.
Stainless Steel 347 Sheets and Plates are widely used in industries requiring high-temperature stability, excellent weldability, and resistance to intergranular corrosion. Common applications include heat exchanger components, furnace parts, expansion joints, refinery equipment, and thermal processing systems. They are also used in exhaust manifolds, boiler casings, pressure vessels, and high-temperature chemical handling units. The niobium stabilization makes SS 347 ideal for welded structures exposed to severe heating cycles. Industries such as petrochemical, aerospace, power generation, and chemical processing rely on this grade for long-lasting, reliable performance in challenging thermal and corrosive environments.
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