Semih Metals, located in Istanbul, Turkey, stands out as a top manufacturer and supplier of Stainless Steel 904L Flat Bars. They pride themselves on delivering high-quality stainless steel products that are built to last, offering impressive durability, corrosion resistance, and strength. Thanks to cutting-edge technology and rigorous quality control, these flat bars are crafted to perform reliably even in the most corrosive and demanding industrial settings. Semih Metals guarantees precise dimensions, an excellent surface finish, and robust mechanical integrity, making their Stainless Steel 904L Flat Bars perfect for industries like chemical processing, marine applications, oil and gas, and power generation, where safety and long-lasting performance are paramount.
The composition of Stainless Steel 904L Flat Bars includes iron, chromium (19–23%), nickel (23–28%), molybdenum (4–5%), and copper (1–2%), all with a low carbon content to reduce carbide precipitation. This unique high-alloy blend offers remarkable resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in acidic and chloride-heavy environments. On the mechanical side, the alloy boasts impressive tensile and yield strength, toughness, and good formability. The combination of outstanding corrosion resistance and mechanical reliability makes 904L flat bars a go-to choice for applications that deal with aggressive chemicals, high temperatures, and prolonged exposure to harsh conditions.
| Standard | ASTM B649, ASME SB649 |
| Round Bar Size | 3mm~ 800mm |
| Square Bar Size | 4mm* 4mm ~100mm* 100mm |
| Flat Bar Size | 2mm ~ 100mm |
| Hex Bar Size | 2mm ~ 100mm |
| Angle Size | 3mm* 20mm* 20mm~ 12mm* 100mm* 100mm |
| Thickness | 50 mm to 6000 mm Long |
| Length | 1 To 6 Meters, Custom Cut Length |
| Form | Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc |
| Grade | Ni | Mo | Cr | Cu | C | Mn | Si | P | S |
| 904L | 23 – 28 | 4 – 5 | 19 – 23 | 1 – 2 | 0.02 max | 2.0 max | 1.0 max | 0.045 max | 0.035 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.05 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | AFNOR | JIS | BS | KS | EN |
| 904L | 1.4539 | N08904 | Z2NCUD31-20AZ | SUS 890L | 904S13 | STS 317J5L | X1NiCrMoCu25-20-5 |
Stainless Steel 904L Flat Bar is widely used in chemical processing, oil and gas, marine, pharmaceutical, and pulp and paper industries due to its exceptional corrosion resistance, particularly in acidic, chloride-rich, and high-stress environments.
Stainless Steel 904L offers superior corrosion resistance compared to standard austenitic stainless steels, excelling in harsh environments with strong acids (sulfuric, phosphoric) and chloride exposure, due to its high nickel, chromium, and molybdenum content, reducing pitting and stress corrosion.
Yes, Stainless Steel 904L Flat Bar is highly suitable for marine environments due to its excellent resistance to chloride-induced pitting, crevice corrosion, and stress corrosion cracking, making it ideal for shipbuilding, seawater equipment, and coastal structural applications.
Stainless Steel 904L Flat Bars find their place in various industries that demand high corrosion resistance and strength. They’re frequently used in chemical processing plants, seawater handling systems, offshore platforms, heat exchangers, and storage tanks. Their ability to endure acids, chlorides, and other corrosive substances makes them ideal for sectors like pulp and paper, pharmaceuticals, and pollution control. Moreover, they are utilized in valves, flanges, shafts, and structural components across both marine and industrial environments. With their durability and reliability, these flat bars are truly built to withstand the test of time.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Semih Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Istanbul, Turkey
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