Weston Stainless, Midland, UK, is a reliable provider of superior stainless steel products that are resilient and affordable, catering to many industries. Its leading product, Stainless Steel 409 Tubing, is produced from grade 409 stainless steel, a ferritic alloy that has high corrosion resistance, strength at elevated temperatures, and weldability. Offered in welded, seamless, and ERW (Electric Resistance Welded) conditions, this tubing is used extensively in applications needing heat and oxidation resistance. Consisting of chromium, iron, and low carbon content, Stainless Steel 409 Tubing finds application in the automotive industry, exhaust systems, heat exchangers, and structural parts.
Specifications : ASTM A731, A268 / ASME SA731, SA268
Dimensions : ASTM, ASME and API
Size : 1/2″ NB to 24″ NB
Type : Seamless, Welded, EFW, ERW, Fabricated
Schedule : SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Form : Round Pipes, Square Pipes, Rectangular Pipes, Oval Pipes, Hydraulic Pipe, etc.
End : Plain End, Treaded, Beveled End
Length : Single Random, Double Random & Cut Length. (Custom Sizes Available as per customers requirement)
| Grade | C | Ni | Si | S | Mn | P | Cr | Ti | |
| SS 409 | min. | – | – | – | – | – | – | 10.5 | 6x C |
| max. | 0.08 | 0.5 | 1.00 | 0.045 | 1.00 | 0.045 | 11.75 | 0.75 | |
| Tensile Strength(MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Rockwell B (HRB) max | Brinell (HB) max |
| 450 | 240 | 25 | 75 | 131 |
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Stainless Steel 409 Tubing has extensive applications in automobile exhaust systems, mufflers, catalytic converters, and exhaust emission control systems, where longevity and high-temperature resistance are crucial. It is also applied in heat exchangers, industrial ventilation systems, and air pollution control devices, providing reliable operation in aggressive conditions. Further, this tube is used in boiler systems, power generation systems, and structural components, with outstanding corrosion resistance and long service life. Due to its superior weldability and oxidation resistance, it is used in chemical processing, food process equipment, and marine applications, providing efficiency and cost savings.
Excellent corrosion resistance and durability. It is available in sizes ranging from 1/8 inch to 24 inches in diameter. Ideal for high-pressure applications due to its strength and resistance to oxidation.
Corrosion-resistant and available in sizes from 1/8 inch to 36 inches in diameter. It is commonly used in applications where welding is necessary, providing a cost-effective solution with good mechanical properties.
Designed for efficient heat transfer and corrosion resistance. Available in sizes ranging from 1/4 inch to 2 inches in diameter, these tubes are used in automotive and industrial heat exchangers.
High corrosion resistance and precision in control systems. Sizes range from 1/16 inch to 2 inches in diameter, making them suitable for various instrumentation and control applications.
Corrosion-resistant and durable, ideal for high-temperature and pressure environments. Available in sizes from 1/2 inch to 5 inches in diameter, they are widely used in power generation and industrial boilers.
Excellent corrosion resistance and are available in sizes from 1/4 inch to 2 inches in diameter. These U-shaped tubes are commonly used in heat exchangers and condensers for efficient thermal performance.
High corrosion resistance and are designed for efficient heat transfer. Sizes range from 1/4 inch to 2 inches in diameter, making them ideal for use in condensers and refrigeration systems.
Enhanced heat transfer efficiency with excellent corrosion resistance. Available in sizes from 1/4 inch to 2 inches in diameter, these tubes are used in applications requiring increased surface area for heat exchange.
Stainless steel 409 tubing is commonly used in automotive exhaust systems, especially automotive exhaust systems, catalytic converters and exhaust systems, due to its excellent corrosion resistance and heat resistance Use in chemical processing, pressure vessels and high-temperature and corrosive industrial equipment atmospheres is common Its low cost of production compared to steel, making it ideal for low cost projects. In addition, they are used in applications that require high-strength materials that can withstand harsh environmental conditions.







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