Neil Metals is a well-respected manufacturer and supplier of Stainless Steel 347 Flat Bars, located in Kolkata, India. They specialize in providing top-notch stabilized austenitic stainless steel products that are perfect for demanding industrial applications. These SS 347 flat bars are celebrated for their impressive resistance to intergranular corrosion and their ability to withstand high temperatures, making them a great choice for heat-intensive and corrosive environments. You’ll find these bars commonly used in sectors like chemical processing, power generation, aerospace, and refineries. With state-of-the-art manufacturing facilities and a commitment to strict quality assurance, Neil Metals guarantees precise dimensions, durability, and dependable delivery of their Stainless Steel 347 Flat Bars, both domestically and internationally.
The composition of Stainless Steel 347 Flat Bars includes 17–20% chromium and 9–13% nickel, with niobium (columbium) added to prevent carbide precipitation during welding and extended exposure to high temperatures. This alloy boasts a tensile strength of about 515 MPa and a yield strength of around 205 MPa. SS 347 is known for its excellent mechanical properties, resistance to oxidation, and thermal stability up to 870°C. Its ability to resist intergranular attack makes it particularly suitable for applications that involve welding or high thermal cycling.
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 347 | 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 347 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 347 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 347 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.
You’ll find Stainless Steel 347 Flat Bars in a wide range of applications that demand high resistance to heat, corrosion, and pressure. They are commonly used in furnace components, heat exchangers, boiler tubes, chemical processing equipment, and flue gas systems. The flat bar shape is especially useful for structural supports, base plates, brackets, and frameworks in high-temperature and corrosive conditions. SS 347 is often the go-to choice in situations where welding is necessary, and post-weld heat treatment isn’t an option. Its remarkable formability, toughness, and resistance to sensitization make it a reliable material for even the most challenging industrial environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Neil Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kolkata, India
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