Rupal Metals stands out as a reputable manufacturer and supplier of Stainless Steel 347H Flat Bars based in Delhi, India. They specialize in providing top-notch heat-resistant stainless steel products that are perfect for tough industrial settings. Stainless Steel 347H is a stabilized austenitic grade with a higher carbon content, crafted specifically to enhance creep resistance and maintain strength at high temperatures. Rupal Metals offers SS 347H flat bars in various sizes and surface finishes, making them ideal for fabrication, structural work, and high-heat applications. These bars are particularly suited for industries like petrochemical, aerospace, power generation, and refineries, where performance under elevated temperatures is critical.
Stainless Steel 347H Flat Bars mainly consist of Chromium (17–20%), Nickel (9–13%), Carbon (0.04–0.10%), and Columbium (Niobium) to prevent intergranular corrosion. This material boasts a tensile strength of about 515 MPa, a yield strength of around 205 MPa, and impressive elongation properties. SS 347H is known for its excellent mechanical strength and resistance to oxidation at high temperatures. It maintains ductility and toughness even after extended heat exposure, making it a great choice for pressure-containing components. The flat bar design allows for easy welding, consistent strength, and reliable structural support in both high- and low-temperature settings.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A582, A276, A564, ASTM A484, 484M
Surface : hrap, hot rolled pickled or sand blasting finished, cold drawn, polished, hairline
Range : Range – 3.17mm to 350mm dia
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 347 | 0.08 max. | 17.0 – 19.0 | 2.00 max. | 9.0-13.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| SS 347H | 0.04 – 0.10 | 17.0 – 19.0 | 2.00 max. | 9.0-12.0 | 0.045 max. | 0.03 max. | 0.75 max. |
| Element | Density | Melting Range,℃ | Tensile Strength | Yield Strength | Elongation | Hardness (Brinell) |
| SS 347H | 7.96 | 1450 ℃ | 515 | 205 | 40 | 201 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 347 | 1.4961 | S34700 |
| SS 347H | 1.4550 | S34709 |
The primary alloying element in Stainless Steel 347H is niobium (Nb), which stabilizes the material against carbide precipitation during welding and high-temperature exposure. This enhances its resistance to intergranular corrosion and improves its overall high-temperature strength.
Stainless Steel 347H is most suitable for applications in the temperature range of 800°C to 1500°F (427°C to 815°C). This range allows it to maintain its strength, corrosion resistance, and stability, particularly in high-temperature environments like furnaces.
Typical dimensions of a Stainless Steel 347H flat bar range from 0.25 inches (6 mm) to 6 inches (150 mm) in thickness and 1 inch (25 mm) to 12 inches (300 mm) in width. Custom sizes are also available.
Stainless Steel 347H Flat Bars are essential in applications that require resistance to high temperatures, intergranular corrosion, and mechanical stress. You’ll find them in heat exchangers, furnace components, boiler tubes, exhaust systems, superheater tubes, and chemical processing equipment. The flat shape of these bars makes them easy to work with for creating supports, braces, and frame structures. SS 347H is particularly valuable in environments where prolonged exposure to high temperatures is common, such as in oil refineries, thermal processing units, and aerospace systems. Its ability to withstand these conditions makes it a go-to choice for many industries.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Rupal Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Delhi, India
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