Dhruv Metals, located in Hyderabad, India, is a well-respected manufacturer and supplier of Stainless Steel 347 Flat Bars, crafted to perform reliably even in high-temperature and corrosive settings. This type of stainless steel is austenitic and stabilized with niobium (also known as columbium), which boosts its resistance to intergranular corrosion after welding. Renowned for its impressive mechanical strength and excellent weldability, the SS 347 flat bars produced by Dhruv Metals are made to exacting tolerances, making them perfect for demanding industrial applications in sectors like chemical processing, aerospace, and power generation.
The composition of Stainless Steel 347 Flat Bars includes chromium (17.0–19.0%), nickel (9.0–13.0%), carbon (≤0.08%), and niobium (at least ten times the carbon content), along with controlled amounts of manganese, silicon, phosphorus, and sulfur. These bars boast a minimum tensile strength of 515 MPa, yield strength of 205 MPa, an elongation of 40%, and Brinell hardness reaching up to 201 HB. The niobium stabilization helps prevent the formation of chromium carbide during welding, ensuring structural stability and corrosion resistance even at elevated temperatures.
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.
Stainless Steel 347 Flat Bars are frequently utilized in high-temperature, high-stress applications where resistance to oxidation and intergranular corrosion is essential. They are particularly suited for heat exchangers, furnace components, exhaust systems, welded pressure vessels, and high-temperature piping. Industries such as petrochemical, aerospace, refining, and thermal processing depend on SS 347 for its ability to maintain mechanical integrity under continuous heat exposure. Its outstanding weldability and stability make it a dependable choice for structural components in environments that face regular thermal cycling and chemical exposure.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Dhruv Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hyderabad , India
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