Al Summan Metals, a leading manufacturer and supplier based in Dubai, UAE, has established a strong reputation for delivering high-quality Stainless Steel 347H Flat Bars. These bars are purpose-built for high-temperature uses, offering exceptional resistance to oxidation, corrosion, and intergranular attack. Through its dedication to precise manufacturing and strict quality control, Al Summan Metals ensures that its Stainless Steel 347H Flat Bars comply with international standards, making them ideal for industries requiring durability and superior performance. The company supplies these bars in a range of sizes and finishes to serve the varied requirements of different industries, ensuring dependability, strength, and an extended service life even under demanding conditions.
The makeup of Stainless Steel 347H Flat Bars consists of chromium (17–19%), nickel (9–13%), carbon (0.04–0.10%), together with manganese, silicon, and stabilizing niobium. This niobium serves a vital function in improving resistance to carbide precipitation while welding and during exposure to elevated temperatures. Such bars display a tensile strength of roughly 515 MPa, a yield strength near 205 MPa, and an elongation of 40%. Their remarkable creep strength and outstanding mechanical stability render them perfect for prolonged use in high-temperature environments without sacrificing structural integrity or corrosion resistance.
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 |
Niobium (Nb) is the main alloying element in Stainless Steel 347H, and it stabilizes the material against carbide precipitation both during welding and under high-temperature exposure. This boosts its resistance to intergranular corrosion and strengthens its overall performance at high temperatures.
Stainless Steel 347H works best for uses within the temperature range of 800°C to 1500°F (427°C to 815°C). This range enables it to retain its strength, corrosion resistance, and stability, especially in high-temperature settings such as furnaces.
Stainless Steel 347H flat bars generally come in thicknesses spanning from 0.25 inches (6 mm) up to 6 inches (150 mm), with widths between 1 inch (25 mm) and 12 inches (300 mm). Custom sizes can also be supplied.
Stainless Steel 347H Flat Bars are widely used in settings that demand heat and corrosion resistance, including chemical processing plants, power generation facilities, and petroleum refining. They work especially well for equipment such as heat exchangers, pressure vessels, boiler tubes, and exhaust manifolds. Because of their strength at high temperatures, these bars are also ideal for manufacturing within the aerospace, marine, and thermal equipment sectors. In addition, they are applied in food processing machinery and the pharmaceutical industry, where cleanliness and resistance to oxidation are essential. Their durability and adaptability make them an outstanding option for both structural and fabrication uses.
Stainless Steel 347H flat bars are chosen because of the outstanding resistance they provide against intergranular corrosion, oxidation, and stress corrosion cracking at elevated temperatures. They are commonly employed in petrochemical, power generation, and aerospace fields where equipment faces extreme conditions, such as heat exchangers, boilers, and furnace parts. Their strong resistance to temperatures reaching 900°C makes them suitable for welding, fabrication, and the production of components that require high strength, durability, and corrosion resistance in harsh environments.
We supply products accompanied by both mill test certificates and third-party test certificates, guaranteeing the highest standards of quality and compliance.
Al Summan Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Dubai, UAE
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