Stainless Steel 904L Flanges are high-performance piping components designed for demanding industrial environments where superior corrosion resistance and mechanical strength are essential. American Metallix Steel Co. manufactures precision-engineered SS 904L flanges that meet the rigorous requirements of chemical processing plants, offshore platforms, refineries, and power generation facilities. These flanges are widely used to connect pipes, valves, pumps, and pressure vessels in systems exposed to aggressive chemicals and high temperatures. In industrial, mechanical, and structural engineering applications, Stainless Steel 904L Flanges provide leak-proof connections and structural integrity in critical piping systems. Their exceptional resistance to acids and chlorides makes them a preferred choice for industries handling sulfuric acid, phosphoric acid, and seawater. Whether installed in heavy fabrication projects or high-pressure pipelines, these flanges deliver long-term operational reliability.
Stainless Steel 904L is a low-carbon, high-alloy austenitic stainless steel enriched with nickel, chromium, molybdenum, and copper. The typical composition includes approximately 19 to 23 percent chromium, 23 to 28 percent nickel, 4 to 5 percent molybdenum, and added copper to enhance resistance to strong reducing acids. This unique alloy structure provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking. Metallurgically, Stainless Steel 904L Flanges exhibit a fully austenitic microstructure, offering excellent toughness and ductility even at sub-zero temperatures. The low carbon content reduces the risk of carbide precipitation during welding, ensuring improved resistance to intergranular corrosion. These flanges maintain high tensile strength and reliable yield strength, making them suitable for pressure equipment and critical structural assemblies. The performance characteristics of SS 904L flanges include excellent weldability, formability, and resistance to oxidation. They perform efficiently in harsh chemical environments and maintain structural stability in elevated temperature conditions. Their non-magnetic properties in the annealed condition further enhance their suitability for specialized engineering applications.
One of the most significant advantages of Stainless Steel 904L Flanges is their exceptional corrosion resistance. The high nickel and molybdenum content provides strong protection against chloride-induced corrosion and aggressive acids, extending the service life of piping systems in chemical processing plants and marine installations. Strength and durability are equally important benefits. These flanges withstand high internal pressure and mechanical stress, ensuring secure connections in pipelines transporting corrosive fluids and gases. Their resistance to stress corrosion cracking makes them ideal for offshore oil and gas operations.
From a fabrication perspective, Stainless Steel 904L Flanges offer good machinability and weldability compared to other high-alloy grades. This reduces installation complexity and improves efficiency during plant construction and maintenance. Over time, their resistance to corrosion and minimal maintenance requirements contribute to cost efficiency and reduced downtime in industrial operations. In the petrochemical and refining sector, Stainless Steel 904L Flanges Manufacturers supply heavy-duty flanges used in pipelines carrying acidic and high-temperature fluids. These flanges ensure secure, leak-proof joints in pressure vessels, reactors, and heat exchangers where corrosion resistance is critical.
Within fertilizer and chemical production plants, Stainless Steel 904L Flanges Suppliers support the installation of piping systems exposed to sulfuric and phosphoric acids. The superior alloy composition of 904L ensures long-lasting performance in aggressive processing environments. For large-scale industrial fabrication and maintenance projects, Stainless Steel 904L Flanges Stockists provide readily available flanges in various pressure ratings and dimensions. Immediate availability helps minimize downtime in power plants, desalination facilities, and heavy engineering projects.
In global infrastructure and marine industries, Stainless Steel 904L Flanges Exporters deliver corrosion-resistant flanges for offshore platforms, coastal installations, and international pipeline projects. Compliance with international standards and reliable export packaging ensure consistent quality across global markets.
Stainless Steel 904L Flanges are manufactured in accordance with ASTM A182 specifications for forged or rolled alloy and stainless steel pipe flanges used in high-temperature and pressure services. The equivalent ASME standard is ASME SA182, which defines chemical composition, mechanical properties, heat treatment, and testing requirements for pressure equipment applications. These flanges are also produced following ASME B16.5 and ASME B16.47 dimensional standards for pipe flanges to ensure compatibility with industrial piping systems. Adherence to these standards guarantees quality, traceability, and suitability for use in refineries, chemical plants, and power generation facilities.
Steel products such as flanges, bars, pipes, tubes, plates, sheets, and coils are classified according to internationally recognized standards including ASTM, ASME, EN, DIN, JIS, and ISO. ASTM and ASME standards are widely used in North America and the Middle East for pressure vessels, piping systems, and industrial fabrication. EN and DIN standards regulate European structural and engineering materials, while JIS standards define specifications for Japanese industrial products. ISO standards ensure uniform testing procedures and quality management systems worldwide. Stainless Steel 904L is identified by its high alloy composition and corrosion-resistant properties, enabling engineers and procurement professionals to specify the correct material grade for chemical processing equipment, structural assemblies, and high-pressure piping systems.
American Metallix Steel Co. is one of the leading manufacturers & suppliers of SS 904L RTJ Flange, UNS N08904 Groove Flange, 904L SS Reducing Flange, SS 904L Longweld Neck Flange, Stainless Steel 904L Blind Flange, DIN 1.4539 Orifice Flange, DIN 1.4539 Flat Flange at the best price in India.
Request Latest Price & Stock AvailabilityStainless Steel 904L Flanges are manufactured according to ASTM A182 and ASME SA182 specifications. They are available in multiple sizes, pressure classes, face types and international dimensional standards for industrial piping applications.
| Specification | Details |
|---|---|
| Specification | ASTM A182 / ASME SA182 |
| Dimension Standard | ANSI/ASME B16.5, B16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Size | 1/2" (15 NB) to 48" (1200 NB) |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64, etc. |
| Flange Face Type | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| DIN Flanges | DIN 2527, 2566, 2573, 2576, 2641, 2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637, 2638, 2673 |
| JIS Flanges | JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K |
| BS Flanges | BS4504 PN 6, BS4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS4504 PN 64, BS4504 PN 100, BS4504 PN 160, BS4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H |
Stainless Steel 904L Flanges are available from 1/2 inch to 48 inches in pressure classes from 150# to 2500# and PN6 to PN64. ANSI, ASME, BS, DIN, EN and JIS configurations are available for different piping and project requirements.
Stainless Steel 904L Flanges contain controlled amounts of carbon, manganese, silicon, phosphorus, sulfur, chromium, molybdenum, nickel and nitrogen for dependable performance in demanding industrial applications.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| Stainless Steel 904L Flanges | 0.035 maximum | 2 maximum | 1.0 maximum | 0.045 maximum | 0.030 maximum | 18 – 20 | 3.00 – 4.00 | 11.00 – 15.00 | 57.89 min |
The table lists the chemical composition limits for Stainless Steel 904L Flanges. All values represent percentage by weight unless otherwise stated.
The mechanical properties of Stainless Steel 904L Flanges include density, melting point, tensile strength, yield strength and elongation values for demanding industrial piping applications.
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm³ | 1400 °C (2550 °F) | Psi – 75000, MPa – 515 | Psi – 30000, MPa – 205 | 35% |
These values describe the density, melting point, tensile strength, yield strength and elongation of Stainless Steel 904L Flanges. Actual values may vary depending on dimensions, manufacturing condition, heat treatment and applicable standards.