SS 309 Seamless Pipes Manufacturer and Supplier in Thailand
Stainless steel 309 seamless pipe is a high-performance stainless steel pipe designed for exceptional heat resistance and durability in demanding environments. Manufactured without welds, these pipes offer enhanced strength, corrosion resistance, and reliability in high-temperature applications. At Thaida, a trusted stainless steel 309 seamless pipe manufacturer based in Chon Buri, Thailand, we produce these pipes using premium-grade DIN 1.4828 / UNS S30900 material. Our advanced manufacturing processes, including precise extrusion and heat treatment, ensure structural integrity and consistent quality. These pipes are widely used in industries such as petrochemical, power generation, and heat treatment, where resistance to oxidation and thermal stress is critical. Available in various sizes and custom-cut options, our ss 309 seamless pipes meet ASTM A312 TP309 standards for dependable performance and maintain structural integrity.
Other Related Product
- Stainless Steel Pipes
- Stainless Steel Seamless Pipes
- Stainless Steel 304 Seamless Pipes
- Stainless Steel 304L Seamless Pipes
- Stainless Steel 310 Seamless Pipes
- Stainless Steel 316 Seamless Pipes
- Stainless Steel 316Ti Seamless Pipes
- Stainless Steel 317 Seamless Pipes
- Stainless Steel 321 Seamless Pipes
- Stainless Steel 347 Seamless Pipes
- Stainless Steel 904L Seamless Pipes
Product Overview: Stainless Steel 309 Seamless Pipes
Key Features and Benefits of Stainless Steel 309 Seamless Pipes
Below are some key features and benefits of 309 stainless steel seamless pipe that make it ideal for demanding industrial applications.
Mechanical Strength and Durability
These pipes maintain structural integrity under mechanical stress and pressure, ensuring long-term performance in tough conditions.
Corrosion Resistance
Offers excellent protection against oxidation, scaling, and corrosion in high-temperature and harsh chemical environments.
High Temperature Resistance
SS309 seamless pipes perform reliably at temperatures exceeding 1000°F, making it perfect for heat-intensive industrial applications.
Formability
Can be easily formed into various shapes without cracking, ideal for custom piping needs and complex installations.
Welding
These pipes support most standard welding methods, allowing easy joining without compromising its strength or corrosion resistance.
Machinability
Offers good machinability for cutting, shaping, and threading, making fabrication efficient and cost-effective.
Non-Magnetic
Stainless steel 309 seamless pipe remains non-magnetic even after cold working, suitable for sensitive applications requiring minimal magnetic interference.
Seamless Construction
Manufactured without welds, reducing risk of leakage and providing uniform strength across the entire pipe length.
Why Choose Our Stainless Steel 309 Seamless Pipes?
Thaida is a leading manufacturer and supplier of high-quality stainless steel 309 seamless tubes, known for their exceptional durability and performance in high-temperature environments. With a focus on precision and reliability, we offer a wide range of custom solutions to meet the specific needs of our clients across various industries. Our stainless steel 309 tubes are crafted to the highest industry standards, ensuring superior corrosion and oxidation resistance, strength, and toughness. We pride ourselves on delivering timely, cost-effective solutions, backed by expert support and guidance every step of the way. Trust us for all your stainless steel 309 seamless tube requirements!
Comprehensive Product Testing
Global Exports Expertise
Large Inventory & Fast Dispatch
Custom Sizes & Finishes
In-House Testing & Full Traceability
Advanced Production Technology
After-Sales Support, Service- Technical Support
Industry Certifications & Compliance
309 Stainless Steel Seamless Pipes Specification
The 309 stainless steel seamless pipe table provides detailed specifications including size range, outer diameter, thickness, schedules, and surface finish.
| Specification | ASTM / ASME SA312 / A312 |
|---|---|
| Dimensions | ASTM, ASME and API |
| Schedule | SCH 10, SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH140, SCH160, XXS |
| Wall Thickness | Schedule 5S - Schedule XXS |
| Size | 1/2" NB - 24" NB |
| Length | Single Random, Double Random & Cut Length |
| Form | Round, Square, Rectangular, Hydraulic etc. |
| End | Plain End, Beveled End, Treaded |
Equivalent grades of Stainless 309 Seamless Pipes
This table lists equivalent grades of Stainless 309, showcasing materials with similar properties for global application compatibility.
| STANDARD | WERKSTOFF NR. | UNS | EN | AFNOR | JIS | BS | GOST |
|---|---|---|---|---|---|---|---|
| ss309 | 1.4828 | S30900 | X15CrNiSi20-12 | Z17CNS20-12 | SUH309 | 309S24 | 20KH20N14S2 |
Chemical Composition of 309 Stainless Steel Seamless Pipes
| Grade | C | Si | Mn | Cr | Ni | P | S | Fe |
|---|---|---|---|---|---|---|---|---|
| 309 | ≤ 0.20 | ≤ 0.75 | ≤ 2.00 | 22.00 – 24.00 | 12.00 – 15.00 | ≤ 0.045 | ≤ 0.03 | Balance |
Mechanical Properties 309 Stainless Steel Pipes
| Properties | Metric | Imperial |
|---|---|---|
| Tensile Strength | 620 MPa | 89900 psi |
| Yield Strength (@ strain 0.200%) | 310 MPa | 45000 psi |
| Izod Impact | 120 - 165 J | 88.5 - 122 ft-lb |
| Shear Modulus (typical for steel) | 77 GPa | 11200 ksi |
| Elastic Modulus | 200 GPa | 29008 ksi |
| Poisson's Ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at Break (in 50 mm) | 45% | 45% |
| Hardness, Brinell | 147 | 147 |
| Hardness, Rockwell B | 85 | 85 |
| Hardness, Vickers (converted from Rockwell B hardness) | 169 | 169 |
Thermal Properties SS 309 Seamless Pipes
The thermal properties table covers critical values like thermal conductivity and expansion of 309 ss seamless pipes.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal Expansion Coefficient (0–100°C / 32–212°F) | 14.9 µm/m·°C | 8.28 µin/in·°F |
| Thermal Conductivity (0–100°C / 32–212°F) | 15.6 W/m·K | 108 BTU·in/hr·ft²·°F |
309 Stainless Steel Seamless Pipes Manufacturing Process
The five steps involved in manufacturing stainless steel 309 seamless pipes with precision and consistency.
1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.
2. Pipes Formation
The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.
3. Heat Treatment
Pipes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.
4. Cold Working and Finishing
After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.
5. Quality Control and Testing
Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.
Applications of Stainless 309 Seamless Pipes
Stainless Steel 309 Seamless Pipes are primarily used in the heat treatment and furnace manufacturing industry due to their excellent high-temperature strength and oxidation resistance. These pipes are widely utilized in radiant tubes, heat exchangers, and industrial furnace components. Also, it is used in petrochemical plants, power generation units, and refineries—especially in catalytic recovery systems, reformers, and superheater tubes.
Oil and Gas Industry
Chemical and Petrochemical Industry
Food and Beverage Industry
Pharmaceutical & Biotechnology
Aerospace & Defense
Automotive and Transportation
Construction and Architecture
Marine & Shipbuilding
Power Generation & Heat Exchange
FAQ's
What industries commonly use Stainless Steel 309 Seamless Pipes?
Industries that commonly use Stainless Steel 309 Seamless Pipes are petrochemical, chemical processing, and power generation. These industries require equipment like furnace parts, radiant tubes, heat exchangers and boiler tubes to operate in high-temperature and corrosive conditions.
Are Stainless Steel 309 Seamless Pipes suitable for welded structures?
Yes, stainless steel 309 seamless pipes can be used in welded structures as they are easy to weld, flexible and can handle high temperatures. These properties enable easy fabrication and strong joints in demanding environments. However, post-weld heat treatment may be necessary to relieve stress.
What is the difference between 309 and 309S stainless steel pipes?
The primary difference lies in the reduced carbon content. 309S has lower carbon content, making it preferred for welded applications. The low carbon content also reduces carbide precipitation compared to 309.
Can Thaida provide custom lengths or finishes for Stainless Steel 309 Seamless Pipes?
Yes, we provide custom lengths and finishes of stainless steel 309 seamless pipes for your different industrial requirements.
What is 309 stainless steel used for?
309 stainless steel is used in industrial equipment for the petrochemical, power generation, and chemical industries and for high-temperature applications like furnace parts, kilns and heat exchangers because of its excellent heat and oxidation resistance.
Is 309 stainless magnetic?
No, 309 stainless steel is non-magnetic in its annealed state, but can become slightly magnetic after it is cold worked.
What is the difference between 309 and 308 stainless steel?
The primary difference between 309 and 308 stainless steel is their chemical composition and applications. 309 has significantly higher levels of chromium and nickel, leading to excellent resistance to oxidation and heat. This makes it preferred for high-temperature applications such as furnace parts, heat exchangers, and boiler components operating at temperatures up to 1900°F. 308 is a more general-purpose austenitic alloy known for its good balance of strength and corrosion resistance, and is most commonly used as a highly effective filler metal for welding other standard stainless steels like Type 304 and for general fabrication
What is the maximum temperature for 309 stainless steel?
The maximum temperature for 309 stainless steel depends on the conditions. For continuous service in oxidizing atmospheres, it’s around 1100°C. Under irregular, high-temperature conditions, the maximum is about 1100°C and for sustained use without oxidation, it’s 1050°C.