Isis Metals is a reputable manufacturer and supplier of Stainless Steel 904L Flat Bars, proudly based in Manila, Philippines. They’re known for delivering high-quality flat bars that boast exceptional corrosion resistance, impressive strength, and long-lasting durability. Crafted from top-notch 904L stainless steel and utilizing advanced production techniques, these flat bars adhere to international quality standards, ensuring precision and reliability. Isis Metals provides a variety of Stainless Steel 904L Flat Bars in different sizes, thicknesses, and finishes, catering to industries like chemical processing, marine engineering, oil and gas, and pharmaceutical manufacturing, where resistance to harsh chemicals and consistent performance are essential.
These Stainless Steel 904L Flat Bars contain 18–20% chromium, 23–28% nickel, 4–5% molybdenum, 1–2% copper, and a low carbon content (≤0.02%). This distinctive blend offers remarkable resistance to pitting, crevice corrosion, and acidic environments, particularly in chloride-rich and sulfuric acid conditions. On the mechanical side, they provide a tensile strength ranging from 520–750 MPa, yield strength between 205–450 MPa, along with excellent ductility and hardness. The low carbon content helps prevent sensitization, while the copper addition boosts performance in reducing acids, making these bars perfect for demanding industrial applications.
| 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 extensive use in chemical tanks, heat exchangers, piping systems, valves, and structural components in corrosive settings. They’re also utilized in marine applications, pharmaceutical equipment, and food processing industries due to their hygienic surface and resistance to aggressive chemicals. These flat bars ensure long-lasting durability, lower maintenance needs, and dependable performance even in extreme conditions, making them an ideal choice for critical engineering and industrial applications that require high corrosion resistance and mechanical strength.














We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Isis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Manila, Philippines
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