Stainless Steel 309 Pipes & Tubes Manufacturer in India
Stainless Steel 309 Pipes & Tubes Manufacturer in India
Sachiya Steel International is a leading Stainless Steel 309 Pipes & Tubes Manufacturer in India, serving industrial customers since 2005. Based in Vasai, near Mumbai, we manufacture heat-resistant stainless steel pipes and tubes for applications exposed to high temperatures and oxidation. Our range includes SS 309, 309S and 309H in seamless and welded forms, with different sizes, wall thicknesses and specifications. Certified to ISO 9001:2015 and TÜV standards, we supply products to buyers in 85+ countries. Our pipes and tubes are manufactured to applicable ASTM A312, A213 and A249 specifications, with EN 10204 3.1 mill test certificates available for material verification. We serve industries requiring dependable stainless steel products for furnaces, heating equipment, thermal processing systems and other high-temperature applications.
What Are Stainless Steel 309 Pipes & Tubes?
Stainless Steel 309 Pipes & Tubes are hollow steel products made from SS 309, a heat-resistant stainless steel grade containing approximately 22–24% chromium and 12–15% nickel. These alloying elements help the steel resist oxidation and retain its strength when exposed to high temperatures.
The pipes are mainly used to carry hot gases or fluids, while the tubes are used in equipment such as heat exchangers, furnace assemblies and industrial heating systems. SS 309 is particularly suitable for applications where materials face continuous heat, hot air or repeated heating and cooling.
Available in seamless and welded forms, Stainless Steel 309 Pipes & Tubes are used in furnaces, kilns, heat-treatment plants, boilers and thermal processing equipment. The grade is selected primarily for its high-temperature performance rather than for severe corrosion resistance in every chemical environment.
Stainless Steel 309 Pipes and Tubes
High-quality Stainless Steel 309 Pipes and Tubes manufactured for demanding applications across chemical, petrochemical, power generation, heat treatment, furnace and engineering industries. Available in seamless, ERW and EFW forms with various sizes, wall thicknesses and manufacturing specifications.
Why Choose Stainless Steel 309 Pipes & Tubes?
Stainless Steel 309 Pipes & Tubes are a reliable choice for industrial equipment exposed to high temperatures, hot gases and repeated heating cycles. Their high chromium and nickel content helps resist oxidation and surface scaling, making them suitable for furnaces, kilns and heat-treatment systems.
- High-Temperature Resistance: Performs well in demanding environments exposed to intense heat.
- Oxidation Resistance: Helps protect the steel surface from scaling at elevated temperatures.
- Good High-Temperature Strength: Maintains useful mechanical strength under suitable operating conditions.
- Long Service Life: Resists heat-related deterioration, helping reduce frequent replacement.
- Good Fabrication Properties: Can be formed and welded using suitable procedures.
- Multiple Grade Options: SS 309, 309S and 309H offer options for different welding and high-temperature requirements.
These properties make SS 309 Pipes & Tubes suitable for furnace equipment, industrial heating systems, thermal processing plants and hot gas handling applications.
Types of Stainless Steel 309 Pipes & Tubes
As a Stainless Steel 309 Pipes & Tubes manufacturer, we manufacture different product types for furnace equipment, heat-treatment plants, industrial heating systems and other applications exposed to high temperatures.
- Seamless Pipes: Hot-finished or cold-drawn pipes without a welded seam, suitable for pressure lines and hot process service.
- Welded Pipes: Manufactured from stainless steel strips with a welded seam, offering a practical solution for high-temperature ducting and industrial systems.
- EFW Large-Bore Pipes: Fusion-welded pipes designed for larger diameters and heavier sections used in flue and exhaust headers.
- Seamless Tubes: Suitable for heater assemblies, radiant coils and heat exchangers operating under demanding thermal conditions.
- Welded Tubes: Used in furnace fittings, muffles and burner components where cost-effective fabrication is important.
- Bent and Coiled Tubes: Custom-formed into U-bends or coils for heating equipment and thermal processing systems.
- Square and Rectangular Tubes: Used for kiln supports, heat-treatment racks and other fabricated structures exposed to elevated temperatures.
We manufacture Stainless Steel 309 Pipes & Tubes in different dimensions and specifications to suit equipment designs and operating requirements.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
Pipes and Tubes
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Seamless Pipes
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LSAW Pipes
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Box Pipes
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Brass Pipes
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Heat Exchanger Tubes
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Boiler Tubes
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Aluminium Pipes
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Carbon Steel Seamless Pipes
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Carbon Steel Pipe
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Alloy Steel Pipe
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Duplex Steel Pipe
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Super Duplex Steel Pipe
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Nickel Alloy Pipe
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Copper Nickel Alloy Pipe
→Get Certified Stainless Steel 309 Pipes and Tubes at Competitive Factory Prices
Stainless Steel 309 Pipes & Tubes Specifications
| Item | Details |
|---|---|
| Material | Stainless Steel 309 / 309S / 309H |
| Product forms | Seamless, welded, EFW |
| Pipe size | ⅛" NPS to 24" NPS |
| Tube OD | 6.35 mm to 114.3 mm |
| Wall thickness | 0.5 mm to 20 mm |
| Delivery condition | Solution annealed, pickled |
| Length | Single random, double random, cut length up to 12 m |
| Ends | Plain, beveled, threaded |
| Finish | Pickled, mill, bright annealed, polished |
| Tests on request | Hydrotest, eddy current, PMI, IGC, ultrasonic |
| Documents | EN 10204 3.1 certificate, inspection reports |
Stainless Steel 309 Pipes & Tubes Standards
| Standard | Scope |
|---|---|
| ASTM A312 / ASME SA312 | Seamless and welded austenitic pipe |
| ASTM A213 / ASME SA213 | Seamless boiler, superheater and heat exchanger tubes |
| ASTM A249 / ASME SA249 | Welded boiler and heat exchanger tubes |
| ASME B36.19M | Stainless pipe dimensions |
| EN 10216-5 / EN 10217-7 | European seamless and welded stainless tubes |
| JIS G3459 | Japanese stainless steel pipe |
Material and Grades of Stainless Steel 309 Pipes & Tubes
309S is the low-carbon version and the one most buyers ask for. Its carbon cap of 0.08% keeps welded joints clean and reduces the risk of carbide trouble near the seam. 309H allows carbon in the 0.04–0.10% range, which lifts creep strength for long, hot service. 309Cb and 309HCb add niobium to tie up carbon for extra stability.
All grades are supplied solution annealed. One caution applies to every variant of the grade. Holding 309 between about 650°C and 900°C for very long periods can form sigma phase, which makes the steel brittle once it cools. We advise designers to consider this when equipment sits in that range for years.
Stainless Steel 309 vs 310S Pipes & Tubes: Key Differences
| Point | 309 / 309S | 310S |
|---|---|---|
| Chromium | 22.0–24.0% | 24.0–26.0% |
| Nickel | 12.0–15.0% | 19.0–22.0% |
| Approx. max service in air | About 1000°C | About 1100°C |
| Price level | Lower | Higher |
| Typical choice | Furnace parts, flue lines, mixed-metal joints | Extreme heat, carburising and cyclic duty |
Choose 309 when temperatures stay near or below 1000°C and cost matters. Step up to 310S when heat, thermal shock or carburising atmosphere pushes beyond that.
Stainless Steel 309 Pipes & Tubes Chemical Composition
| Element | 309S (%) | 309H (%) |
|---|---|---|
| Carbon (C) | 0.08 max | 0.04 – 0.10 |
| Manganese (Mn) | 2.00 max | 2.00 max |
| Silicon (Si) | 1.00 max | 1.00 max |
| Phosphorus (P) | 0.045 max | 0.045 max |
| Sulphur (S) | 0.030 max | 0.030 max |
| Chromium (Cr) | 22.0 – 24.0 | 22.0 – 24.0 |
| Nickel (Ni) | 12.0 – 15.0 | 12.0 – 15.0 |
| Molybdenum (Mo) | 0.75 max | 0.75 max |
| Iron (Fe) | Balance | Balance |
Stainless Steel 309 Pipes & Tubes Mechanical Properties
| Property | Value |
|---|---|
| Tensile strength | 515 MPa min |
| Yield strength (0.2%) | 205 MPa min |
| Elongation | 35% min |
| Hardness | 192 HBW max |
| Density | About 7.9 g/cm³ |
| Melting range | About 1400 – 1450°C |
| Max service temperature (oxidising air) | About 1000°C |
Stainless Steel 309 Pipes & Tubes Size and Weight Chart
Weights are theoretical, using (OD − Wall) × Wall × 0.02491 for kg per metre with dimensions in mm. Mill tolerances will move the real weight slightly.
OD and wall are in mm. Multiply the result by the pipe or tube length to obtain the total weight.
Pipes (ASME B36.19M)
| NPS | OD (mm) | Sch 40S wall (mm) | Sch 40S kg/m | Sch 80S wall (mm) | Sch 80S kg/m |
|---|---|---|---|---|---|
| ½" | 21.3 | 2.77 | 1.28 | 3.73 | 1.63 |
| ¾" | 26.7 | 2.87 | 1.70 | 3.91 | 2.22 |
| 1" | 33.4 | 3.38 | 2.53 | 4.55 | 3.27 |
| 1½" | 48.3 | 3.68 | 4.09 | 5.08 | 5.47 |
| 2" | 60.3 | 3.91 | 5.49 | 5.54 | 7.56 |
| 3" | 88.9 | 5.49 | 11.41 | 7.62 | 15.43 |
| 4" | 114.3 | 6.02 | 16.24 | 8.56 | 22.55 |
| 6" | 168.3 | 7.11 | 28.55 | 10.97 | 42.99 |
| 8" | 219.1 | 8.18 | 42.98 | 12.70 | 65.30 |
Tubes (OD basis)
| OD (mm) | Wall (mm) | Weight (kg/m) |
|---|---|---|
| 12.70 | 1.65 | 0.45 |
| 19.05 | 2.11 | 0.89 |
| 25.40 | 2.77 | 1.56 |
| 31.75 | 1.65 | 1.24 |
| 38.10 | 2.11 | 1.89 |
| 50.80 | 3.05 | 3.63 |
| 63.50 | 2.77 | 4.19 |
| 76.20 | 3.40 | 6.17 |
| 101.60 | 4.19 | 10.17 |
Stainless Steel 309 Pipes & Tubes Sizes, Dimensions and Schedules
Thin-wall schedules are popular for 309 because the steel is expensive per kilo and many hot lines carry low pressure. The thinner 5S and 10S walls cut weight, while heavier schedules cover pressure and mechanical load. The table links each size to its DN equivalent.
| NPS | DN | OD (mm) | Sch 5S (mm) | Sch 10S (mm) |
|---|---|---|---|---|
| ¾" | 20 | 26.7 | 1.65 | 2.11 |
| 1¼" | 32 | 42.2 | 1.65 | 2.77 |
| 2" | 50 | 60.3 | 1.65 | 2.77 |
| 2½" | 65 | 73.0 | 2.11 | 3.05 |
| 5" | 125 | 141.3 | 2.77 | 3.40 |
| 10" | 250 | 273.1 | 3.40 | 4.19 |
| 12" | 300 | 323.9 | 3.96 | 4.57 |
Tubes can be ordered by OD and wall in mm, inches or BWG. Custom diameters, cut-to-length pieces and special end work are made to drawing.
Common Materials Supplied with Stainless Steel 309 Pipes & Tubes
High-temperature projects often require different materials for furnace sections, exhaust systems, heating equipment and process lines. Along with Stainless Steel 309 Pipes & Tubes, we supply other heat-resistant grades and alloys to suit varying temperature limits, strength requirements and operating conditions.
SS 310 / 310S: Offer higher chromium and nickel content than SS 309, making them suitable for more demanding oxidation and high-temperature applications.
SS 304H / 316H: Higher-carbon grades used where improved strength at elevated temperatures is required.
SS 321 / 321H: Titanium-stabilised grades designed for applications involving elevated temperatures and welding.
SS 347 / 347H: Niobium-stabilised grades commonly selected for refinery equipment and power generation systems.
SS 446 / 409: Ferritic stainless steel grades used in selected heat-resistant components and exhaust systems.
Alloy 800H / 800HT: Nickel-iron-chromium alloys used in demanding high-temperature equipment where creep resistance and structural stability are important.
As experienced stainless steel pipes and tubes suppliers, we help buyers identify suitable materials based on operating temperature, oxidation exposure, mechanical requirements and project specifications.
Applications of Stainless Steel 309 Pipes & Tubes
- Furnace and Heat Treatment: Radiant tubes, muffles, annealing covers and recuperator parts.
- Petrochemical and Refining: Heater tubes, burner assemblies and hot process headers.
- Power Generation: Boiler superheater sections, flue gas ducts and soot-blower lines.
- Chemical Processing: Reactors and transfer lines that run hot with oxidising gases.
- Cement and Minerals: Kiln ducts, preheater piping and cooler components.
- Waste-to-Energy: Incinerator liners and hot gas pipework.
- Glass and Ceramics: Kiln fittings and combustion air lines.
- Building Services: Smoke extraction and high-temperature flue systems.
Why Choose Us as Your Stainless Steel 309 Pipes & Tubes Manufacturer in India?
Since 2005, we have developed our manufacturing and export capabilities to serve industries that depend on heat-resistant stainless steel products. From our plant in Vasai, near Mumbai, we supply Stainless Steel 309 Pipes & Tubes to customers in 85+ countries, with a monthly supply capacity of over 100 tons across our stainless steel product range.
Our range includes SS 309, 309S and 309H pipes and tubes in seamless and welded forms. We also manufacture EFW pipes, cold-drawn tubes, bent tubes and coiled tubes in different diameters, wall thicknesses and lengths to suit equipment designs and project specifications. These products serve furnace manufacturers, heat-treatment plants, industrial heating systems and other high-temperature applications.
We follow quality management practices supported by our ISO 9001:2015 and TÜV certifications. Our products are manufactured to applicable ASTM specifications, including A312, A213 and A249, depending on product type, and can be supplied with EN 10204 3.1 mill test certificates for material verification. Our experience in manufacturing and international exports helps us handle bulk orders, specific dimensional requirements and repeat supply schedules.
Countries We Export To
Our Stainless Steel 309 Pipes & Tubes reach customers in 85+ countries worldwide, supporting industries that require materials capable of handling high temperatures and oxidation. With experience in international trade, we serve industrial buyers, furnace manufacturers, engineering companies and distributors across multiple markets.
Gulf and Middle East: UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, Iran.
Europe: Germany, Italy, France, United Kingdom, Netherlands, Spain, Turkey, Poland.
North America: USA, Canada, Mexico.
Asia-Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia, South Korea, Japan.
Africa: South Africa, Nigeria, Egypt, Kenya, Algeria, Ghana.
South America: Brazil, Chile, Argentina, Colombia.
South Asia: Nepal, Bangladesh, Sri Lanka.
Our export services include shipment-specific commercial invoices, packing lists, bills of lading and certificates of origin where required. We also provide EN 10204 3.1 mill test certificates for material traceability. As an experienced stainless steel pipes and tubes supplier in India, we support international customers with product specifications and documentation suited to their order requirements.
FAQs
Common questions about SS 309 pipes and tubes, temperature limits, welding, testing and supply.
Which temperature range suits SS 309 pipes?
Up to about 1000°C in oxidising air. Beyond that, or in carburising and sulphur-rich gas, 310S or a nickel alloy is the safer choice.
Can 309 pipe be welded to carbon steel?
Yes. 309 is widely used for joining stainless to carbon or low-alloy steel, with 309L filler commonly used on the weld.
Is 309 better than 304 for heat?
Yes. 304 starts scaling at much lower temperatures, while 309's higher chromium and nickel hold the oxide layer to roughly 1000°C.
Does 309 stainless steel resist sigma phase?
Not entirely. Very long exposure between about 650°C and 900°C can form sigma phase and reduce toughness at room temperature.
Which standard applies to 309 heat exchanger tubes?
ASTM A213 covers seamless tubes and A249 covers welded ones, in grades such as TP309S and TP309H.
How do I calculate the weight of a 309 pipe?
Use (OD − Wall) × Wall × 0.02491 with both dimensions in mm to get kg per metre. Multiply by length for total weight.
Is 309 magnetic?
In the annealed state it is essentially non-magnetic. Cold work or welding can add slight magnetism.
Can you supply custom sizes and lengths?
Yes. Non-standard OD and wall combinations, cut lengths, bends, and special ends are made to your drawing.
Which certificates come with the order?
We supply EN 10204 3.1 mill test certificates, and third-party inspection reports when the purchase order asks for them.
Which tests can be added before dispatch?
Hydrostatic or eddy current testing, PMI, ultrasonic examination and IGC testing can be added on request, alongside the standard chemical and mechanical tests.
How are the pipes and tubes packed for shipment?
Pipes are capped and bundled in waterproof wrapping, then