Midland, UK-based Weston Stainless is a prominent manufacturer of high-quality stainless steel products, offering strong and corrosion-resistant solutions to a range of industries. Among its high-end products, Stainless Steel 904L Tubing is renowned for its excellent corrosion resistance, high strength, and weldability. Grade 904L is the category under which this tubing falls, and it is offered in seamless, welded, and fabricated forms to suit different industrial requirements. It is made from austenitic stainless steel and has excellent resistance to acidic conditions, pitting, and chloride stress corrosion, making it a good option for use where long-term reliability and strength are needed in severe conditions.
| Standards | ASTM / ASME |
| Designation | B 649, SB 649 |
| Grade | 904L Round Bars and Rods 904L Round Bars and Rods: ASTM B 649, ASME SB 649 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | Cu |
|---|---|---|---|---|---|---|---|---|---|
| SS 904L | 0.020 max | 2 max | 1 max | 0.040 max | 0.030 max | 19.0-23.0 | 4.0-5.0 max | 23.00 – 28.00 | 1.0-2.0 |
| 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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Stainless Steel 904L Tubing mainly contains iron and a high percentage of nickel (23-28%) and chromium (19-23%) for superior corrosion resistance. It also has molybdenum (4-5%), copper (1-2%), and low carbon, which increase its mechanical strength and acid–resistant properties. The tubing is about 490 MPa tensile strength, around 220 MPa yield strength, and 35% elongation. Its physical characteristics are a density of around 8 g/cm³, high thermal conductivity, and good thermal expansion, and it is best used in extreme temperatures and corrosive environments.
High resistance to corrosion and oxidation, ideal for harsh environments in chemical processing, marine, and pharmaceutical industries, providing durability and strength.
Exceptional resistance to pitting and crevice corrosion, suitable for use in aggressive environments like chemical processing and marine applications, ensuring robust performance and longevity.
Superior corrosion resistance and strength, perfect for structural applications in corrosive environments, such as chemical plants and marine environments, offering durability and reliability.
High corrosion resistance and strength, used in chemical processing, marine, and industrial applications, where durability and performance under harsh conditions are required.
Excellent corrosion resistance and are used in structural and mechanical applications, particularly in aggressive environments such as chemical processing and marine settings.
Superior resistance to corrosion and high strength, ideal for structural support in corrosive environments like chemical plants and marine applications, ensuring long-lasting performance and reliability.
904L Tubing Stainless Steel finds extensive application in high-corrosion-resistance-requiring industries like chemical processing, marine, and offshore. It plays a key role in power plants, heat exchangers, and pharmaceutical processing equipment where acetic, phosphoric, and sulfuric acid resistance is necessary. It is also utilized in seawater desalination, pulp and paper, and food processing industries because of its non-reactive qualities and durability. Its exceptional mechanical properties, chloride stress corrosion cracking resistance, and extended service life make it the first choice for challenging industrial environments.
Stainless Steel 904L Tubing is shipped with EN 10204 3.1 or 3.2 mill test certificates to confirm conformance with international quality standards. It is well-protected packaging in wooden crates, plastic wrap, or tube separators to avert transit damage. Delivery is according to order size and location, with logistics ensuring prompt dispatch. Special packaging arrangements are arranged on request to suit specific client requirements, to ensure the tubing reaches its destination in the best possible condition.







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