Industrial Furnaces
Burner pipes and other furnace parts that face direct flame are made from 310, which keeps its structural integrity at very high temperatures and stays stable in carburizing and nitriding atmospheres.
ASME B36 / UNS S31000 / W.Nr. 1.4845
Stainless Steel 310 Seamless Pipes Manufacturer in Thailand
Manufactured in Ban Bueng, Chonburi, Thailand, stainless steel 310 seamless pipes from Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd. are made for furnace, boiler, sintering and refinery lines that run hot in oxidizing gas. Designated UNS S31000 and WNR 1.4845, this 25Cr-20Ni grade is the higher-carbon, heat-resisting member of our stainless steel seamless pipes range. We produce it in NPS sizes and schedules for pressure and process piping, and our office is in Bang Phli, Samut Prakan.
Stainless Steel 310 seamless pipeUNS S31000 / W.Nr. 1.4845
- 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
Specifications of SS 310 Seamless Pipe
Match your line list against our production range for SS 310 seamless pipe. Order by NPS and schedule or by OD and wall thickness; the grade is fixed on the order and on the certificate by UNS S31000.
- Grade
- Stainless Steel 310
- UNS S31000
- WNR / EN Number
- 1.4845
- Outside Diameter
- 6 to 1016 mm
- Wall Thickness
- 1 to 65 mm
- Length
- Up to 18 mor cut to length
- Dimensional Standard
- ASME B36.19M (NPS and schedule)
- Form
- Seamless
- Manufacturing Route
- 1Hot piercing over a mandrel
- 2Hot rolling and cold drawing
- Delivery Condition
- Annealed and pickled
- End Type
- Plain endbeveled end, threaded (threading not on Sch 5S and 10S walls)
- Surface Finish
- Pickled and passivatedbright annealed, polished, mirror or brushed
- Test Certificate
- EN 10204 3.13.2 on request
Dimensions follow ASME B36.19M, so each seamless stainless steel 310 pipe is ordered by NPS and schedule like the rest of a process line, while chemistry and properties are those of UNS S31000 in the tables that follow. Where a project specification calls for an ASTM A312 grade, the closest listed grade in the 310 family is TP310S, the low-carbon version; plain 310 is produced to its own UNS S31000 composition. European drawings that name the material by number are supplied as seamless WNR 1.4845 pipe, with the number cross-referenced on the certificate.
Paperwork starts with an EN 10204 3.1 (3.2 on request) material test certificate for every heat. Behind it sit the raw material certificate, heat treatment charts, a 100% PMI record and a report on surface roughness and measured size. When your specification asks for more, flattening, flare, bend, impact, hardness, pitting, grain size, eddy current, ultrasonic and hydrostatic results are added to the manufacturer test certificate, and intergranular corrosion testing follows ASTM A262. Third-party inspection and a government-approved laboratory report are available on request.
Chemical Composition of Stainless Steel 310 (UNS S31000)
Grade 310 combines 24.00 to 26.00% chromium and 19.00 to 22.00% nickel with a carbon limit of 0.25%. Limits are in percent by weight and are reported for each heat on the material test certificate.
- CrChromium, 24.00 to 26.00
- NiNickel, 19.00 to 22.00
- MnManganese, 2.00 max
- SiSilicon, 1.50 max
- CCarbon, 0.25 max
UNS S31000310
| Element | Stainless Steel 310 (%) |
|---|---|
| C (Carbon) | 0.25 max |
| Mn (Manganese) | 2.00 max |
| P (Phosphorus) | 0.045 max |
| S (Sulfur) | 0.030 max |
| Si (Silicon) | 1.50 max |
| Cr (Chromium) | 24.00 to 26.00 |
| Ni (Nickel) | 19.00 to 22.00 |
Mechanical Properties of 310 Stainless Steel Seamless Pipe
Tension test results for 310 stainless steel seamless pipe are reported on the certificate against these minimums.
| Property | Minimum |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 40% |
Equivalent Designations of Stainless Steel 310
Stainless Steel 310 is identified by the following designations in American, European, international (ISO), Japanese, Chinese and Russian standards.
- UNSS31000
- AISI310
- WNR / EN Number1.4845
- ISOX15CrNi25-21
- JISSUS310
- GB (ISC / Name)S31020 / 20Cr25Ni20
- GOST20X25H20C2
In China the material is also known as 2520 stainless steel.
Seamless Stainless Steel 310 Pipe Sizes and Schedules
Seamless stainless steel 310 pipe runs from 6 mm outside diameter up to 1016 mm, in wall thicknesses of 1 mm through 65 mm and lengths of up to 18 m, cut to length on request. The table gives nominal wall in mm for mid and large NPS sizes in stainless schedules to ASME B36.19M.
| NPS (in) | OD (mm) | Sch 10S | Sch 40S | Sch 80S |
|---|---|---|---|---|
| 2 | 60.3 | 2.77 | 3.91 | 5.54 |
| 3 | 88.9 | 3.05 | 5.49 | 7.62 |
| 6 | 168.3 | 3.40 | 7.11 | 10.97 |
| 10 | 273.1 | 4.19 | 9.27 | 12.70 |
| 16 | 406.4 | 4.78 | 9.53 | 12.70 |
| 20 | 508 | 5.54 | 9.53 | 12.70 |
Swipe sideways to see the full table.
Small-bore sizes, Schedule 5S and heavier walls within the 65 mm limit are quoted on request. For heat exchanger and instrumentation work ordered by exact OD and wall, our stainless steel 310 seamless tubes are the matching product.
Grade Selection and Welding of UNS S31000 Seamless Pipe
Carbon is what separates the three 25Cr-20Ni grades, and it decides which one belongs in a given line.
| Grade | UNS | Carbon (%) | Typical Choice |
|---|---|---|---|
| 310 | S31000 | 0.25 max | Hot process and structural runs that need higher strength at temperature |
| 310S | S31008 | 0.08 max | Welded assemblies where sensitization during welding must be limited |
| 310H | S31009 | 0.04 to 0.10 | Long-term service where creep and stress rupture properties govern |
Swipe sideways to see the full table.
For welded high-temperature assemblies, low-carbon 310S seamless pipes reduce the risk of sensitization during welding compared with higher-carbon 310. Where sustained load at temperature makes creep the design case, controlled-carbon 310H seamless pipe keeps the same oxidation resistance as 310 and is intended for service where creep and stress rupture properties are important.
Industrial Applications of Seamless S31000 Stainless Steel Pipe
Grade 310 is chosen where pipe runs hot in air, flue gas or furnace atmospheres.
Fluidized Bed Furnaces
Seamless 310 lengths form the enclosed heating elements inside fluidized bed furnaces, applying heat without direct flame contact with the product and radiating it reliably over long periods of operation.
Sintering and Cement Plants
In cement kilns and sintering plants, the pipe serves burner shields and discharge systems, handling the dusty, high-heat conditions of turning raw minerals into cement.
Ore Processing and Steel Plants
Smelters and continuous casting equipment use the pipe to move hot gases and molten material, where it has to cope with the thermal shock of heavy metal melting.
Petroleum Refining
Catalytic recovery systems and flare tips in refineries run on 310 stainless steel seamless pipe, which resists the sulfur-rich, high-heat gases produced during crude oil distillation.
Power Generation and Boilers
Pulverized coal burners use seamless S31000 stainless steel pipe, and boiler and heat exchanger circuits use it where the pipe carries boiling water and steam without corroding.
Cryogenic Components
At the other end of the scale, 310 keeps its toughness and low magnetic permeability at very low temperatures, so it is used in liquid nitrogen storage and other deep-freeze laboratory equipment.
Shipping and Packaging of Seamless WNR 1.4845 Pipe
Bundling
Pipe is bundled under protective wrapping or woven bags; export lots travel in wooden or plywood cases with seaworthy packing.
Identification
Each length is stenciled with grade, UNS S31000 and heat number; color codes, barcode labels and your own marks can be added.
Ends
Plain and beveled ends are capped before the bundle is closed.
Cutting
Lengths are cut and beveled to your list before dispatch.
Terms
FOB, CIF or CFR.
Markets
Sites across Thailand, plus export to Singapore, Malaysia, Vietnam, Indonesia, the Philippines and India.
Seamless 1.4845 Stainless Steel Pipe Price per kg
Stainless Steel 310 seamless pipes are indicatively priced at around USD 5.5 to 9.5 per kg. With 19.00 to 22.00% nickel in the alloy, the nickel price is the main swing factor, followed by size: small-bore and large-OD pipe sit toward the top of the range. Send your NPS, schedule, length and quantity to Thaida for a firm quotation.
Indicative price, Stainless Steel 310 Seamless Pipes
USD 5.5 to 9.5 per kg
Indicative only. Send your sizes and specification to Thaida for a firm quotation.
- Outside diameter
- Schedule
- Length
- Quantity
- Nickel price
Manufactured and Shipped from Thailand
Stainless Steel 310 Seamless Pipes are produced at our factory at 154 Moo.1 Map Phai, Ban Bueng, Chonburi 20170, Thailand. Commercial questions, quotations and shipping documents go through our office at 89/18 Moo.15 Enterprize Park, Bangna-Trad Road, Bang Kaeo, Bang Phli, Samut Prakan 10540, Thailand. Each seamless 1.4845 stainless steel pipe order is filled from held stock or from a scheduled production run, and the quotation states which.
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
Grade 310 Seamless Pipe FAQ
Why pick grade 310 over low-carbon 310S?
When the line runs mainly in hot gas and strength at temperature matters more than weld sensitization, since 310 offers higher strength for demanding high-temperature applications. If the run is heavily welded and its joints will also meet corrosive liquids, the 0.08% carbon limit of 310S is the safer choice, and sustained creep load points to 310H.
A drawing gives only WNR 1.4845. Which grade will be supplied?
The European cross-reference assigns 1.4845 to both 310 and low-carbon 310S, so we confirm the grade before production. Order by UNS S31000 to receive 310: we mark UNS S31000 on every length, and the certificate shows both UNS S31000 and 1.4845.
Can 310 seamless pipe be supplied with weld-ready ends?
Yes. Lengths are beveled for butt welding and cut to the dimensions on your isometric, with plain ends for socket joints. Threaded ends are available on Schedule 40S and 80S walls, because Schedule 5S and 10S walls do not permit threading.
What operating details should accompany a grade 310 inquiry?
The temperature profile, including hold times and startup or idle periods, the atmosphere (air, flue gas, carburizing or nitriding) and any sustained load. Prolonged exposure in the intermediate temperature range can cause sigma phase in 310, and long-term load at temperature may call for 310H instead.
Are drawing-based OD and wall sizes possible in grade 310?
Yes. Any OD and wall pairing from your drawing can be made, provided it sits inside our envelope of 6 to 1016 mm outside diameter and 1 to 65 mm wall, at lengths of 18 m or shorter. Give the OD, wall, length and quantity of each size and we confirm it with the quotation.
Which results appear on the grade 310 material certificate?
Heat number, chemistry against the UNS S31000 limits, and tension results against 515 MPa tensile, 205 MPa yield and 40% elongation, plus the PMI record and any additional tests you ordered. The certificate is issued to EN 10204 3.1 (3.2 on request).
Is grade 310 magnetic?
Only weakly. Grade 310 is austenitic with low magnetic permeability, so a magnet is a poor way to check a length on site. Match the heat number stenciled on the pipe to the certificate and its PMI record instead.
Request a Quote for Stainless Steel 310 Seamless Pipes
or email sales@thaida.co.th