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Stainless Steel 309 and 309S Tubes are high-alloy austenitic grades designed for superior heat and corrosion resistance. The 309S variant contains lower carbon, improving weldability while reducing carbide precipitation. These tubes are manufactured from a balanced blend of chromium, nickel, manganese, silicon, phosphorus, sulfur, and iron, giving them exceptional resilience in both high-temperature and corrosive conditions. They have high tensile and yield strength, as well as good elongation and controlled hardness, allowing for consistent performance. Preston Pipes & Alloys, a leading stainless steel 309/309S tube supplier, delivers these products with strict adherence to global quality standards, ensuring consistent results in critical applications.
Our tubes withstand extended exposure to heat and oxidizing environments. They preserve structural stability under high heat cycling. Stainless Steel 309 Tubes are commonly used in furnace components, heat exchangers, kiln liners, chemical processing, and power generation equipment. Their resistance to oxidation and scale at elevated temperatures makes them a perfect fit for aerospace, and automotive exhaust systems. The combination of strength, toughness, and corrosion resistance allows them to meet a variety of industrial purposes.
We manufacture it to precise specifications such as it comes in sizes ranging from 1/8″NB to 30″NB. They are available in round, square, rectangular, oval, “U” shaped and hydraulic forms. Schedules include SCH 5, SCH 10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, and SCH XS. Length options include single random, double random, and custom cut lengths. In order to obtain smooth surfaces, precise dimensions, and uniform wall thickness for dependable installation and service life, the production process uses advanced forming, welding and finishing techniques.
Each tube is subjected to thorough quality inspections, including mechanical testing, chemical analysis, hydrostatic testing and non-destructive examination. This ensures defect-free delivery that meets ASTM A / ASME SA213 / A249 standards. To prevent damage during transit, wood crates, plastic wrapping, and end caps are used. This cautious handling preserves the surface finish and structural integrity until the tubes are delivered to the customer. Choose Stainless Steel 309/309S Tubes for unmatched performance and reliability in demanding environments.
| Specifications | ASTM A213, A249, A270 / ASME SA213, SA249, SA270 |
| Standard | ASTM, ASME and API |
| Seamless Tubes Range | 1/2" OD - 12" OD |
| Welded Tubes Range | 1/2" OD - 12" OD, Guage: 25 SWG - 10 SWG |
| Outside Diameter | 3.00 mm - 219.10 mm, 6.35 mm O.D to 114.3 mm O.D |
| Length | Single Random, Double Random & Required Length |
| Thickness | 0.40 mm - 12.70 mm, 0.8 mm to 12.7 mm |
| Schedule | SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH120, SCH140, SCH160, XXS |
| Type | Seamless, Welded, ERW |
| Form | Round Tubes, Square Tubes, Rectangular Tube |
| End | Plain End, Beveled End, Treaded |
SS 309/309S Seamless Tube
SS 309/309S Welded Tube
SS 309/309S ERW Tube
SS 309/309S EFW Tube
SS 309/309S Round Tube
SS 309/309S Square Tube
SS 309/309S Rectangular Tube
SS 309/309S Polished Tube
Contact Preston Pipes and Alloys for best offer & competitive
quotation of Stainless Steel 309/309S Tube
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 309 | 0.20 max | 2 max | 1 max | 0.045 max | 0.030 max | 18.0 – 23 | - | 8.0 - 14 | - |
| SS 309S | <=0.080 max | <=2.00 max | <=0.75 max | <=0.040 max | <=0.015 max | 22.00 - 24.00 | - | 12.00 - 14.00 | - |
| Density | Specific Heat | Modulus of Elasticity | Thermal Conductivity 212°F (100°C) | Melting Range | Electrical Resistivity |
| 0.285 lbs/in3 7.89 g/cm3 | 0.12 BTU/lb-°F (32 – 212°F) 502 J/kg-°K (0 – 100°C) | 28.5 x 106 psi 193 GPa | 9.0 BTU/hr/ft2/ft/°F 15.6 W/m-°K | 2500 – 2590°F 1480 – 1530°C | 30.7 Microhm-in at 68°C 78 Microhm-cm at 20°C |
| STANDARD | WERKSTOFF NR. | UNS | EN | AISI |
| SS 309 | 1.4828 | S30900 | X12CrNi23-13 | 309 |
| SS 309S | 1.4833 | S30908 | X12CrNi23-13 | 309S |
