Weston Stainless, Midland, UK-based, is a reliable stockist of superior stainless steel products, offering long-lasting and corrosion-resistant solutions to numerous industries. Of its range of premium products, Stainless Steel 904L Flanges stand out due to their superior corrosion resistance, high tensile strength, and excellent weldability. Graded as Grade 904L, these flanges are available in various shapes such as weld neck, slip-on, blind, socket weld, and threaded types, fulfilling various industrial requirements. Made of austenitic stainless steel, they possess high resistance to acids, pitting, and chloride corrosion, which makes them suitable for demanding environments that demand long-term stability.
Stainless Steel 904L Flanges consist mainly of iron with a high content of nickel (23-28%) and chromium (19-23%) for high corrosion resistance. They also include molybdenum (4-5%), copper (1-2%), and low carbon for added strength and acidic environment protection. These flanges have a tensile strength of approximately 490 MPa, a yield point of about 220 MPa, and 35% elongation. Physical properties are density of approximately 8 g/cm³ and superior thermal expansion and conductivity, allowing them to operate well in high-stress and corrosive applications.
| 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 | Cu |
| SS 904L | 0.020 max | 2 max | 1.00 max | 0.040 max | 0.030 max | 19.00 – 23.00 | 4.00 – 5.00 max | 23.00 – 28.00 | 1.00 – |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.95 g/cm3 | 1350 °C (2460 °F) | Psi – 71000 , MPa – 490 | Psi – 32000 , MPa – 220 | 35 % |
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Excellent corrosion resistance, high strength, and durability for industrial applications, ensuring reliable performance.
High-strength applications requiring extended weld connections. They offer exceptional corrosion resistance and structural integrity, making them suitable for demanding industrial environments.
Designed for flexibility and ease of assembly, featuring excellent corrosion resistance and strength. Their superior durability makes them ideal for applications in aggressive environments and high-pressure systems.
Strong corrosion resistance, high durability, and are ideal for sealing pipe ends in demanding environments.
Stainless Steel 904L Flanges are extensively utilized in applications with higher corrosion resistance needs, e.g., chemical processing, offshore, and marine industries. They find application in heat exchangers, power stations, and drug equipment, where resistance to acetic, phosphoric, and sulfuric acids is vital. They are also used in seawater desalination plants, food processing and paper and pulp industries because of their non-reactive character and high resistance to wear and tear. Their fine mechanical properties and resistance to chloride stress corrosion cracking make them an ideal choice for critical industrial use.
Stainless Steel 904L Flanges are supplied with mill test certificates like EN 10204 3.1 or 3.2 to ensure global quality standards. They are properly packed in wood crates, bubble wraps, or with plastic-capped ends to avoid transit damage. Deliveries are based on order quantity and destination, with effective logistics facilitating timely despatch. Special packaging arrangements can be provided on request to suit special customer needs, ensuring the flanges reach at optimum condition.
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