Maduka Metals, a leading manufacturer and supplier located in Abuja, Nigeria, specializes in high-quality Stainless Steel 347H Flat Bars. These bars are designed to offer outstanding corrosion resistance, impressive strength at high temperatures, and long-lasting durability. Crafted to meet international standards, they ensure dependable performance across various demanding sectors, including industrial, chemical, petrochemical, and power generation. Maduka Metals caters to a wide range of industries, such as aerospace, manufacturing, and marine, delivering cutting-edge stainless steel solutions. With a focus on precision manufacturing and rigorous quality control, each Stainless Steel 347H Flat Bar boasts excellent mechanical properties, long-term stability, and resistance to scaling, oxidation, and stress corrosion, making them perfect for critical high-performance and structural applications.
The composition of Stainless Steel 347H Flat Bars primarily includes austenitic stainless steel with about 17–19% chromium, 9–13% nickel, 0.04–0.10% carbon, along with trace amounts of niobium, manganese, and silicon. This blend provides remarkable corrosion resistance, high creep and tensile strength at elevated temperatures, and good ductility. In terms of mechanical properties, 347H stainless steel shows tensile strengths ranging from 600–800 MPa, yield strengths between 250–450 MPa, and a hardness of around 180–200 HB, making it an excellent choice for high-temperature industrial and engineering applications that demand strength, durability, and thermal stability.
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 find extensive use in industries that require high-temperature strength, corrosion resistance, and long-lasting durability. In the chemical and petrochemical sectors, they are utilized for heat exchangers, furnace components, and piping systems that handle aggressive media. The power generation industry employs 347H flat bars in boilers, turbines, and exhaust systems that are subjected to high temperatures. Aerospace and marine applications also benefit from their resistance to thermal creep and oxidation. Furthermore, Stainless Steel 347H Flat Bars are ideal for various industrial applications, ensuring reliability and performance in challenging environments.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Maduka Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Abuja, Nigeria
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