Industrial Furnaces
Industrial furnaces use seamless stainless steel 309 pipe for muffles, retorts and furnace gas lines, with each length solution annealed before it leaves our Ban Bueng mill.
ASME B36 / UNS S30900 / W.Nr. 1.4828
Stainless Steel 309 Seamless Pipes Manufacturer in Thailand
Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. supplies stainless steel 309 seamless pipes from its Ban Bueng, Chonburi, Thailand factory, offering a heat-resisting chromium-nickel grade for furnace, boiler and heat-treatment piping. Each UNS S30900 seamless pipe (W.Nr. 1.4828) is hot pierced and hot rolled, cold drawn where the size calls for it, then solution annealed. Quotations are handled by our office in Bang Phli, Samut Prakan, and the grade sits in the heat-resisting group of our stainless steel seamless pipes.
Stainless Steel 309 seamless pipeUNS S30900 / W.Nr. 1.4828
- 6 to 1016 mmOutside diameter
- 1 to 65 mmWall thickness
- Up to 18 mLength
- EN 10204 3.1Test certificate
EN 10204 3.1 certificate / 3.2 on request
SS 309 Seamless Pipe Specifications
Specify each 309 stainless steel seamless pipe by NPS and schedule for process piping, or by OD and wall where a furnace drawing fixes the size. The table lists our production range and delivery condition.
- Grade
- Stainless Steel 309 (UNS S30900, W.Nr. 1.4828)
- Dimensional Standard
- ASME B36.19M
- Schedules
- 5S, 10S, 40S, 80S
- Outside Diameter
- 6 to 1016 mm
- Wall Thickness
- 1 to 65 mm
- Length
- Up to 18 mcut to length on request
- End Type
- Plain or beveledthreaded on Sch 40S and 80S walls
- Surface Finish
- Pickled and passivatedbright annealed, polished, mirror, brushed
- Form
- Seamless
- Manufacturing Route
- 1Hot pierced over a mandrel and hot rolled
- 2Cold drawn where the final size requires it
- Heat Treatment
- Solution annealed at 1040 to 1150°C (1900 to 2100°F), rapid cool
- Test Certificate
- EN 10204 3.13.2 on request
Dimensions and schedules follow ASME B36.19M, and the pipe is supplied in the 309 chemistry and annealed properties set out in the tables below, identified by UNS S30900. ASTM A312 lists no plain 309 grade; a project that must order to A312 would use TP309S, its closest listed grade.
Each seamless 1.4828 stainless steel pipe delivery comes with an EN 10204 3.1 (3.2 on request) material test certificate, supported by 100% PMI, the raw material certificate, heat treatment charts, a surface roughness and size measurement report and, where your project requires it, a test report from a government-approved laboratory.
Chemical Composition of Stainless Steel 309 (UNS S30900)
Chromium and nickel define the grade: 22.00 to 24.00% chromium and 12.00 to 15.00% nickel support its resistance to oxidation and scaling in high-temperature service. Each heat of seamless S30900 stainless steel pipe is reported against these limits on the mill certificate.
- CrChromium, 22.00 to 24.00
- NiNickel, 12.00 to 15.00
- MnManganese, ≤ 2.00
- SiSilicon, ≤ 1.00
- CCarbon, ≤ 0.20
UNS S30900309
| Element | Stainless Steel 309 (%) |
|---|---|
| C (Carbon) | ≤ 0.20 |
| Mn (Manganese) | ≤ 2.00 |
| P (Phosphorus) | ≤ 0.045 |
| S (Sulfur) | ≤ 0.030 |
| Si (Silicon) | ≤ 1.00 |
| Cr (Chromium) | 22.00 to 24.00 |
| Ni (Nickel) | 12.00 to 15.00 |
Mechanical Properties of Seamless WNR 1.4828 Pipe
Minimum values for seamless WNR 1.4828 pipe apply to the annealed condition, reached by solution annealing at 1040 to 1150°C (1900 to 2100°F) followed by rapid cooling.
| Property (annealed) | Value |
|---|---|
| Tensile Strength, min | 550 MPa (80 ksi) |
| Yield Strength, min | 205 MPa (30 ksi) |
| Elongation, min | 40% |
Equivalent Designations of Stainless Steel 309
Stainless Steel 309 is identified by these designations in American, German, European, Japanese, British, Russian and French standards.
- USA (UNS)S30900
- USA (AISI)309
- Germany (W.Nr.)1.4828
- Europe (EN)X15CrNiSi20-12
- Japan (JIS)SUS 309
- UK (BS)309S24
- Russia (GOST)20KH20N14S2
- France (AFNOR)Z17CNS20-12
We certify under UNS S30900 and cross-reference W.Nr. 1.4828 whenever a drawing calls for it: a seamless 1.4828 stainless steel pipe on a European data sheet and a UNS S30900 seamless pipe on an American one are the same product.
Seamless Stainless Steel 309 Pipe Sizes and Schedules
For furnace, boiler and flue gas lines, the selection below covers larger bores from NPS 4 to NPS 30 in the light and standard schedules of ASME B36.19M. Sch 80S walls, smaller NPS and any other combination within 6 to 1016 mm OD and 1 to 65 mm wall are produced to your drawing, in lengths up to 18 m. Sizes ordered by OD and wall tolerance for heat exchanger and instrument duty are made as stainless steel 309 seamless tubes.
| NPS | OD (mm) | Sch 5S wall (mm) | Sch 10S wall (mm) | Sch 40S wall (mm) |
|---|---|---|---|---|
| 4 | 114.3 | 2.11 | 3.05 | 6.02 |
| 8 | 219.1 | 2.77 | 3.76 | 8.18 |
| 12 | 323.9 | 3.96 | 4.57 | 9.53 |
| 24 | 610 | 5.54 | 6.35 | 9.53 |
| 30 | 762 | 6.35 | 7.92 | n/a |
Swipe sideways to see the full table.
End Preparation for Seamless S30900 Stainless Steel Pipe
Beveled ends are prepared for butt welding, and plain ends are cut square. Threads are cut only on Sch 40S and 80S walls; the lighter 5S and 10S walls stay plain or beveled. Cut-to-length, end protection, color coding, stencil marking and barcode labels are arranged with the order.
How Grade 309 Compares with 304 and 310
Against stainless steel 304 seamless pipes, with 18.0 to 20.0% chromium and 8.0 to 11.0% nickel, grade 309 is the more highly alloyed choice for heat-resisting service in furnaces, boilers and flue gas systems. For still higher alloy content, stainless steel 310 seamless pipes are the next step. In sulfur-bearing gas, 309 performs acceptably in mildly sulfurizing atmospheres at moderate temperatures, while 310 offers more resistance where sulfidation is the main concern.
Industrial Applications of 309 Stainless Steel Seamless Pipe
Heat-resisting duty, from furnaces and boilers to flue gas treatment, is where grade 309 earns its place in a piping system.
Boiler Components
Boiler tubes and superheater lines carry steam at elevated temperature and pressure. SS 309 seamless pipe is supplied for these circuits with the schedule wall chosen to suit the design pressure.
Flue Gas Desulfurization (FGD) Systems
Scrubber piping in flue gas desulfurization plants carries hot, sulfur-bearing flue gas. Grade 309 serves these lines, and the scrubber's gas analysis is the first document we review before quoting.
Thermal Processing Equipment
Annealing, hardening and brazing furnaces take seamless grade 309 for atmosphere and exhaust lines near the hot zone, where keeping oxidation scale to a minimum decides how long each length lasts.
Waste Incineration Systems
Incinerator flue lines and combustion-zone ducting carry high-temperature oxidizing gas containing chlorides and sulfur compounds, a duty that calls for the oxidation resistance of seamless grade 309 in large bores.
Pulp and Paper
Pulp and paper mills route corrosive chemicals at high temperature through seamless grade 309 lines, combining heat duty and chemical exposure in one piping system.
Shipping and Packaging
Small and medium bores
Bundled in protective wrapping and woven bags.
Identification
Each length stenciled with UNS S30900, heat number and size; color bands and barcode labels added to your marking plan.
Large bores and polished lengths
Wooden or plywood cases, with seaworthy packing built for the shipping route.
Ends
Caps fitted over every bore and bevel before packing.
Export terms
FOB, CIF or CFR from Thailand.
Markets served
Thailand nationwide, plus Singapore, Malaysia, Vietnam, Indonesia, the Philippines and India.
Price of UNS S30900 Seamless Pipe per kg
Stainless steel 309 seamless pipes are indicatively priced at USD 4 to 8 per kg. The rate tracks nickel, which makes up 12 to 15% of grade 309, and a line shifts within the band with NPS, schedule, length, finish and any added tests. Send your sizes and quantities to Thaida for a firm quotation.
Indicative price, Stainless Steel 309 Seamless Pipes
USD 4 to 8 per kg
Indicative only. Send your sizes and specification to Thaida for a firm quotation.
- Outside diameter
- Schedule
- Length
- Finish
- Quantity
- Testing and certification
- Nickel price
Where Your 309 Seamless Pipe Is Made
Production of stainless steel 309 seamless pipes takes place at our factory at 154 Moo.1 Map Phai, Ban Bueng, Chonburi 20170, Thailand. Technical questions, drawings and quotation requests go to our office at 89/18 Moo.15 Enterprize Park, Bangna-Trad Road, Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand. Whether a size ships from finished stock or from the next production run is stated on every quotation.
Factory154 Moo.1 Map Phai, Ban Bueng,
Chonburi 20170, Thailand
Chonburi 20170, Thailand
Office89/18 Moo.15 Enterprize Park, Bangna-Trad Road,
Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand
Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand
Exporting to
- Singapore
- Malaysia
- Vietnam
- Indonesia
- Philippines
- India
Stainless Steel 309 Seamless Pipes FAQ
How does 309 seamless pipe hold up in carburizing furnace atmospheres?
Adequately, at moderate temperatures. Its chromium and nickel content resists carburizing atmospheres well enough for furnace components and heat-treatment fixture lines. For severe carburizing conditions, send the atmosphere and operating temperature with your inquiry so we can check the duty against 309.
Can grade 309 handle sulfur-bearing flue gas?
It depends on the atmosphere. In some sulfur-bearing atmospheres 309 gives good resistance, with results set by sulfur activity and operating conditions, but it should not be used in strongly reducing sulfurizing atmospheres at high temperature. Send the gas analysis and temperature with your inquiry.
Is 309 seamless pipe suited to lines that heat and cool repeatedly?
Grade 309 is intended mainly for non-cyclic service at elevated temperature, such as steady-running furnace and boiler lines. If your line heats and cools repeatedly, send the cycle pattern with the operating conditions so we can judge whether 309 or another grade suits it.
How does grade 309 differ from grade 310?
Mainly in alloy content: 309 carries 22.00 to 24.00% chromium and 12.00 to 15.00% nickel, while 310 carries 24.00 to 26.00% chromium and 19.00 to 22.00% nickel. Carbon limits differ as well, 0.20% max for 309 against 0.25% max for 310. Send your operating conditions and we will confirm the grade.
What wall does Sch 10S or Sch 40S give on large-bore 309 seamless pipe?
On NPS 8, Sch 10S gives 3.76 mm and Sch 40S gives 8.18 mm; on NPS 24, the same schedules give 6.35 mm and 9.53 mm. Sch 80S walls for these sizes, 12.70 mm on both NPS 8 and NPS 24, are produced on request.
In which condition and finish is 309 seamless pipe delivered?
Solution annealed and rapidly cooled, then pickled and straightened before testing. Hot-finished lengths keep the pickled and passivated mill finish, cold-drawn lengths come bright, and polished, mirror or brushed surfaces are extra steps on request. Every length is in the annealed condition on which the 550 MPa tensile minimum is based.
Which inspection records can be added to a 309 seamless pipe order?
Eddy current (ET), ultrasonic (UT) and hydrostatic (HT) test results, flattening, flare and bend tests, intergranular corrosion testing to ASTM A262, pitting corrosion and grain size checks, plus a third-party inspection report, all available on request. They appear on the manufacturer test certificate alongside the heat chemistry and mechanical results.
Request a Quote for Stainless Steel 309 Seamless Pipes
or email sales@thaida.co.th