Home > Sheet and Plates > Stainless Steel 347/347H Sheet and Plates
Stainless Steel 347/347H Sheet and Plates are niobium-stabilized austenitic stainless steels that are designed to impart exceptional resistance to intergranular corrosion and high-temperature creep. The 347H type contains higher carbon content for enhanced strength at elevated temperatures. Andre Stainless at Pulau Ujong produces these grades in thicknesses appropriate for pressure vessels, boilers, and heat exchangers. SS 347/347H resists carbide precipitation during welding and elevated-temperature service, maintaining long-term structural integrity. The material is extremely weldable, formable, and operates consistently in corrosive and thermal applications. These plates meet ASTM A240 and are broadly specified in petrochemical, pharmaceutical, and food processing industries.
SS 347/347H contains 17–20% chromium, 9–13% nickel, and niobium (or columbium) for stabilization. The “H“ grade has 0.04–0.10% carbon, which increases creep strength. Tensile strength is 515–750 MPa, and yield strength is around 205–275 MPa. Elongation is around 40%. The alloy has very good resistance to stress rupture and intergranular corrosion, particularly after welding. SS 347/347H maintains strength at temperatures of up to 870°C. It is non-magnetic, possesses high toughness, and retains structural and mechanical integrity under pressure and high heat, making it suitable for harsh service conditions demanding tough, corrosion-resistant materials.
Stainless Steel Sheets and Plates Specification : ASTM A240 / ASME SA240
Dimension Standard : JIS, AISI, ASTM, GB, DIN, EN, etc
Width : 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Length : 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Thickness : 0.3 mm to 120 mm
Form : Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc.
Surface Finishing : Hot rolled plate (HR), Cold rolled sheet (CR),2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, Chequered, embossed, hair line, sand blast, Brush, etching, SATIN (Met with Plastic Coated) etc.
| C | Cr | Mn | Ni | P | S | Si | Cb/Ta | |
|---|---|---|---|---|---|---|---|---|
| 347 | 0.08 max | min: 17.0 max: 20.0 | 2.0 max | min: 9.0 max: 13.0 | 0.04 max | 0.30 max | 0.75 max | min:10x C max: 1.0 |
| 347H | min: 0.04 max: 0.10 | min: 17.0 max: 20.0 | 2.0 max | min: 9.0 max: 13.0 | 0.03 max | 0.30 max | 0.75 max | min:10x C max: 1.0 |
| Grade | Tensile Strength ksi (MPa) min | Yield Strength 0.2% ksi offset ksi (MPa) min | Elongation (% in 50mm) min | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 347/347H | 75 (515) | 30 (205) | 40 | 201 | 95 |
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Known for excellent corrosion resistance, these sheets are produced through hot rolling. They are available in thicknesses from 3mm to 50mm and widths up to 2000mm, providing durability in high-temperature environments and are used in heavy-duty applications
These plates are cold-rolled for a smooth finish and have superior corrosion resistance. They are available in thicknesses ranging from 0.5mm to 12mm and widths up to 1500mm, which is ideal for precision applications and structural components.
These plates offer excellent corrosion resistance, with a patterned surface for better traction and safety. They are available in various thicknesses, from 1.5mm to 6mm, and up to 1500mm in width, which makes them useful for flooring and industrial applications.
Offering high corrosion resistance, the sheets are perforated in a variety of hole patterns to achieve ventilation and aesthetics. Typical thicknesses vary between 0.5mm to 6mm, while the width may be up to 2000mm for filter applications and decorative panels.
The shim sheets have excellent corrosion resistance. Thickness can range from 0.1mm to 2mm, width up to 1000mm, and are precision cut for exact measurements. They are used where fine adjustments are necessary.
These plates feature outstanding corrosion resistance, and have a polished surface for enhanced appearance and cleanliness. They are available in widely used thicknesses that range from 3mm to 25mm and widths up to 2000mm. They find applications mainly in decorative and sanitary use.
SS 347/347H Plates and Sheets are widely used in high-temperature, high-pressure applications like steam piping, superheaters, and shells of heat exchanger. They are suitable for refinery equipment, furnace parts, and welding-intensive processes. In the chemical industry, the sheet is applied in reboilers, reactor vessels, and flare stacks. Food processing facilities utilize it in pasteurizers and sterilizers. In the aerospace sector, it’s utilized in engine casings and thermal insulation. The stabilized structure makes the sheets suitable for any fabrication that experiences thermal cycling and welding and is thus imparted with durability and resistance to carbide precipitation for extended periods of service under high thermal conditions.
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