Weston Stainless, Midland, UK is a premier provider of top–grade stainless steel products to a range of industrial markets with precision-engineered solutions. Its high-end product, Stainless Steel 409L Tubing, is manufactured using grade 409L stainless steel, a low-carbon ferritic alloy renowned for outstanding corrosion resistance, weldability, and strength at elevated temperatures. In seamless, welded, and ERW (Electric Resistance Welded) varieties, this tubing is used where durability and oxidation resistance are required. Comprising mainly iron, chromium, and low carbon levels, Stainless Steel 409L Tubing has extensive applications in the automotive sector, exhausts, heat exchangers, and industrial process equipment.
Stainless Steel 409L Tubing contains 10.5-12.5% chromium, ≤0.03% carbon, and trace amounts of manganese, silicon, phosphorus, and sulfur, providing superior oxidation resistance and weldability. The tubing has a tensile strength of 380-450 MPa, a yield strength of 170-240 MPa, and a hardness of up to 89 HRB, making it extremely tough. With a density of 7.7 g/cm³ and a melting point of around 1450°C, it has good thermal stability and moderate strength. Its high-temperature resistance, corrosion resistance, and mechanical stress resistance make it suitable for numerous industrial and commercial uses.
| Material | Grade |
|---|---|
| GRADES | TP 409L Stainless Steel Tubes / UNS S40903 / DIN 1.4512 |
| SIZE | 1/2″ NB to 24″ NB |
| STANDARDS | ASTM A213, ASTM A249, ASTM A554, ASTM A269, ASTM A270, ASTM A790, ASTM A789 |
| TYPE | Seamless Tubes, Welded Tubes, EFW Tubes, ERW Tubes, Fabricated Tubes, Cold Drawn Welded Tubes (CDW Tubes) |
| FORM | Round Tubes, Square Tubes, Rectangular Tubes, Oval Tubes, Hydraulic Tube, etc. |
| END | Plain End, Treaded, Beveled End |
| TOLERANCE on Length | Commercial Length: 6000mm +/- 30mm Fix Length: from 1200 mm up to 12000mm with a tolerance up to -0/+ 5mm |
| FINISH | Seamless, Welded, Brushed, Pickled, Solution Annealed and Pickled up to O.D. 219.1mm, Polished Grit 120 – 600, Mirror Polished |
| AISI 409L | Maximum | Minimum |
|---|---|---|
| Ni | 28.00 | 23.00 |
| C | 0.20 | – |
| Mn | 2.00 | – |
| P | 00.045 | – |
| S | 00.035 | – |
| Si | 1.00 | – |
| Cr | 23.0 | 19.0 |
| Mo | 5.00 | 4.00 |
| N | 00.25 | 00.10 |
| CU | 2.00 | 1.00 |
| Element | Grade 409L |
|---|---|
| Density | 8 |
| Melting Range | 1300 -1390 ℃ |
| Tensile Stress | 490 |
| Yield Stress (0.2%Offset) | 220 |
| Elongation | 35% minimum |
| Hardness (Brinell) | – |
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Stainless Steel 409L Tubing is extensively used in automotive exhaust systems, catalytic converters, and mufflers, where heat resistance and durability are essential. It is also used in heat exchangers, industrial ventilation equipment, and pollution control equipment, providing reliability for high-temperature applications. The tubing is further used in power generation plants, boiler parts, and structural uses, providing superior corrosion resistance and long-term performance. Its higher weldability and oxidation resistance feature make it a good candidate for chemical processing equipment, food processing equipment, and marine equipment, where efficiency and durability are required.
Excellent corrosion resistance, Stainless Steel 409L Seamless Tubing is known for its uniformity and strength. It typically comes in sizes ranging from 6mm to 350mm in diameter and lengths of up to 6 meters. Ideal for applications requiring high pressure and corrosive resistance.
Superior resistance to chloride-induced stress corrosion cracking. Available in sizes from 10mm to 150mm in diameter and standard lengths of 6 meters. It is often used in industrial and chemical processing applications where weld strength is critical.
Featuring outstanding corrosion resistance, Stainless Steel 409L Heat Exchanger Tubes are used in demanding environments. Sizes typically range from 6mm to 50mm in diameter, with wall thickness varying from 1mm to 3mm. These tubes are designed for high temperature and pressure conditions.
Excellent resistance to corrosion and is ideal for precise measurement systems. Common sizes include 1/8″ to 1/2″ in diameter and lengths up to 6 meters. It is suitable for high-pressure applications and harsh environments.
Superior resistance to both oxidation and corrosion, Stainless Steel 409L Boiler Tubes are used in high-pressure steam applications. Sizes typically range from 25mm to 100mm in diameter, with lengths of up to 6 meters. They are essential for maintaining efficiency in boiler systems.
Excellent resistance to corrosive fluids and are commonly used in heat exchangers. Standard sizes range from 10mm to 100mm in diameter with various lengths. They are designed to handle thermal expansion and contraction in dynamic environments.
Used in marine and power generation applications, offering exceptional resistance to seawater and acidic environments. Sizes typically range from 10mm to 50mm in diameter and lengths up to 6 meters, providing durability and efficiency.
Designed for enhanced heat transfer and corrosion resistance in air-cooled heat exchangers. They are available in various diameters, commonly 25mm to 50mm, with fin lengths customizable to specific requirements, ensuring effective cooling in challenging environments.
Weston Stainless offers mill test certificates (MTC) according to EN 10204 3.1/3.2, conforming to international quality standards. The tubing is properly packed in wooden crates, plastic wrap, or custom protective packaging to avoid damage during shipping. With a well-established global distribution system and quality control systems, Weston Stainless ensures prompt delivery, conforming to customer requirements and industry standards with accuracy and reliability.
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