Harsh Metalloys, based in Mumbai, India, stands out as a top manufacturer and supplier of high-quality Stainless Steel 304L Flanges. Our 304L flanges are crafted for outstanding corrosion resistance and weldability, making them a popular choice across various industries, including chemical processing, pharmaceuticals, food and beverage, and water treatment. As a low-carbon version of SS 304, 304L provides improved resistance to intergranular corrosion, particularly after welding. At Harsh Metalloys, we guarantee that all our flanges comply with international standards like ASTM, ANSI, and ASME, and we offer a range of types, such as slip-on, weld neck, blind, and threaded, to cater to specific application requirements.
Stainless Steel 304L Flanges boast a well-balanced chemical composition that ensures excellent corrosion resistance and strength. Key elements include Chromium (18–20%), Nickel (8–12%), Carbon (≤0.03%), Manganese (≤2%), Silicon (≤1%), Phosphorus (≤0.045%), and Sulfur (≤0.03%). Their mechanical properties feature a tensile strength of at least 485 MPa, yield strength of at least 170 MPa, elongation of 40% or more, and hardness of no more than 92 HRB. The lower carbon content not only enhances weldability but also reduces the risk of sensitization, making 304L flanges ideal for corrosive and high-temperature environments while ensuring they maintain their structural integrity and longevity.
| Standard | ASTM A182 / ASME SA182 |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges |
| Size | 1/2″ (15 NB) to 48″ (1200NB) |
| Class/Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 |
| Flange Face Type | Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 304L | 0.08 max | 2 max | 0.75 max | 0.045 max | 0.030 max | 18 – 20 | – | 8 – 11 | – |
| 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 % |
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We provides Stainless Steel 304L Flanges- Harsh Metalloys,which has undergone intense testing to produce top quality and performance. The flange is thoroughly tested for meeting international standards and specifications. Products supplied by us are certified by recognized authorities for traceability and reliability in each batch. With modern technology and strict quality control, we ensure durability, corrosion resistance, and good mechanical properties. Harsh Metalloys stands by the delivery of flanges with the highest level of industry standards in functionality and safety.
SS 304L slip-on flanges are widely used in piping systems due to their corrosion resistance and durability. Made from stainless steel 304L, these flanges provide reliable connections with ease of installation.
SS 304L weld neck flanges are designed for high-pressure applications, offering excellent strength and durability. Made from stainless steel 304L, they ensure a strong, leak-proof connection in critical piping systems.
SS 304L blind flanges are used to seal the end of a pipe, preventing flow and providing access for maintenance. Crafted from stainless steel 304L, they offer durability and corrosion resistance.
SS 304L socket weld flanges are designed for high-strength, secure connections in piping systems. Made from stainless steel 304L, they provide excellent resistance to corrosion and ease of installation.
SS 304L ring type joint flanges provide a robust seal for high-pressure applications. Made from stainless steel 304, they ensure a tight, leak-proof connection with their precision-engineered ring design.
SS 304L forged flanges are crafted from stainless steel 304L through a forging process, offering exceptional strength and durability. They are ideal for high-pressure applications and resist corrosion effectively.
Stainless Steel 304L Flanges are a go-to choice for many applications that require top-notch corrosion resistance, cleanliness, and easy fabrication. They’re perfect for connecting pipes, valves, pumps, and other equipment in systems that deal with corrosive fluids. You’ll often find them in industries like chemical and petrochemical plants, food processing, pharmaceuticals, water supply and treatment, and marine systems. The 304L grade shines in welded environments and areas with chloride exposure. With various types available, such as weld neck, slip-on, socket weld, and blind flanges, these components guarantee secure and leak-proof piping connections, ensuring durability and reliability even in tough service conditions.







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