SS 314 Seamless Tubes Manufacturer and Supplier in Thailand

Name: Stainless Steel 314 Seamless Tubes
Brand: Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd.

Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, is a trusted 314 stainless steel seamless tubes supplier with extensive manufacturing expertise. With a strong focus on precision and industry-leading standards, we ensure each stainless steel 314 seamless tube meets the highest performance. We utilize advanced manufacturing processes, including strict quality checks and annealing techniques, to guarantee durability and reliability. We have the largest inventory of providing quick access to a range of sizes and specifications for diverse industrial applications. With a commitment to excellence, our tubes are manufactured in accordance with international certifications, ensuring compliance with global standards. These stainless steel seamless tubes are commonly used in heat exchangers, high-temperature furnaces, and other critical applications where corrosion resistance and high strength are essential. Our UNS S31400 tubes are also equivalent to global standards, ensuring compatibility across various markets.

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Know About Stainless Steel 314 Tubing

Stainless Steel 314 Tubing (UNS S31400, JIS SUS314) is a high-alloy austenitic stainless steel designed for extreme environments where high-temperature strength and resistance to oxidation and carburization are critical. As a leading stainless steel tubes manufacturer, we produce tubing composed of approximately 23–26% chromium, 19–22% nickel, and 1.5–3% silicon, boasting exceptional durability and stability even in harsh conditions. The high chromium content ensures excellent oxidation resistance, while the nickel enhances its overall corrosion resistance and toughness, making it ideal for high-temperature applications such as heat exchangers, kilns, and furnace components. The presence of silicon further improves its resistance to carburization, allowing it to withstand environments where carbon-rich atmospheres could degrade other materials. Stainless steel 314 tubing, which is often annealed by heating to relieve stresses and improve mechanical properties, is widely used in industries requiring high-grade components that can endure thermal stresses and aggressive chemicals. Its excellent combination of high-temperature strength and resistance to oxidation makes it a preferred choice for components exposed to elevated temperatures and challenging operational environments.

Benefits of 314 Stainless Steel Seamless Tubes

SS 314 retains significant strength up to ~1150°C, surpassing the limits of 304/316 stainless steels. This makes it ideal for use in high-temperature processes, ensuring reliability in extreme conditions.

The high chromium and silicon content in SS 314 provides exceptional resistance to scaling and oxidation, significantly extending the service life of tubes in continuous high-heat environments.

The silicon in SS 314 enhances its resistance to carburization, especially in hydrocarbon-rich atmospheres. This helps prevent surface carbide buildup, ensuring the longevity and integrity of the tubes.

SS 314 exhibits exceptional toughness and durability under thermal stress, reducing downtime and maintenance needs. It ensures long-term performance in harsh, high-temperature environments.

Similar to other austenitic grades at ambient temperatures, SS 314 offers adequate resistance to corrosion for many chemical and process uses. While SS 316 may have superior pitting resistance, SS 314 excels in high-heat applications.

With its high purity and alloying, SS 314 is ideal for critical applications, such as gas turbines and refinery heaters, where reliable performance is essential for safety and efficiency.

Why Choose Thaida For Your Stainless Steel 314 Seamless Tubes Needs?

We are the best ASTM A312 TP314 Stainless Steel Seamless Tubes Supplier in Thailand, offering top-quality SS UNS S31400 tubes. Available in various thicknesses, diameters, and finishes, our tubes are customized as per the client’s requirements. We ensure reliable performance and precision, meeting all industrial standards for your specific applications.

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Specification of ASTM A213 Stainless Steel 314 Seamless Tubes

Lists equivalent grades as per international standards. Helps in cross-referencing SS 314 with global material specifications.

Specifications	ASTM A213 / SA 213
Dimensions	ASTM, ASME and API
Seamless 314 Tubes	1/2 inch NB to 48 inch NB
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type	ASTM A 213 TP 314 Seamless Tubes
Specialized in	Large Diameter Size
Length	Single Random, Double Random & Cut Length
Form	Round, Square, Rectangular, Hydraulic Etc
End	Plain End, Beveled End, Treaded

Chemical Composition of SS 314 Seamless Tubes

Provides the percentage of key elements like chromium, nickel, and silicon. These elements contribute to the tube’s high-temperature performance.

C	Mn	P	S	Si	Cr	Ni
≤0.25	≤2.00	≤0.045	≤0.030	1.50–3.00	23.00–26.00	19.00–22.00

Mechanical Properties of Stainless Steel 314 Seamless Tubes

Details the tube’s tensile strength, yield strength, and elongation. These properties define its performance under mechanical stress.

Tensile Strength	Yield Strength	Elongation (in 50 mm)	Hardness, Rockwell HRB	Hardness, Brinell HB
≥689 MPa	≥345 MPa	≥40%	≤85	≤433

314 Stainless Steel Seamless Tubes Equivalent Grades

Lists equivalent grades as per international standards. Helps in cross-referencing SS 314 with global material specifications.

STANDARD	UNS	WERKSTOFF NR.
SS 314	S31400	1.4841

Manufacturing Process of SS 314 Seamless Tubes

The manufacturing of SS 314 seamless tubes begins with heating the raw material to high temperatures, followed by extrusion to form the initial tube shape. This is then cold-drawn to refine its dimensions and mechanical strength, and finally subjected to heat treatment and surface finishing to ensure durability and quality standards.

1. Raw Material Selection
High-quality stainless steel billets and strips are carefully selected for superior strength and corrosion resistance.

2. Tubes Formation
The selected raw material is formed into tubes using seamless extrusion methods, depending on the application.

3. Heat Treatment
Tubes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working and Finishing
After heat treatment, tube are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every tube is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications of Stainless Steel 314 Seamless Tubes

Stainless Steel 314 Seamless Tubes are used in high-temperature industries such as metallurgical, petrochemical, and thermal processing. Key applications include furnace conveyor systems, heat exchangers, radiant tubes, and heat treatment components like annealing and carburizing boxes.

Aerospace & Defense

Automotive and Transportation

Oil and Gas Industry

Chemical and Petrochemical Industry

Construction and Architecture

Food and Beverage Industry

Marine & Shipbuilding

Pharmaceutical & Biotechnology

Power Generation & Heat Exchange

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FAQ's

What is 314 stainless steel tube used for?

314 stainless steel tubes are widely used in industries such as power generation, petrochemical, aerospace, and chemical processing for their exceptional performance in high-temperature and corrosive environments. They are commonly used in furnace components, heat exchangers, boiler tubes, exhaust systems, and refining equipment. With excellent strength, oxidation resistance, and stability at elevated temperatures, 314 stainless steel tubes ensure reliable performance and long service life in demanding industrial applications

What is the difference between 314 and 316 stainless steel tube?

The key difference between 314 and 316 stainless steel lies in their composition and performance. 314 stainless steel, with its high silicon, chromium, and nickel content, is designed for high-temperature applications up to 1200°C (2190°F), offering excellent resistance to oxidation, sulfidation, and carburization. In contrast, 316 stainless steel contains about 2% molybdenum, which enhances its corrosion resistance, making it ideal for marine and chemical environments where exposure to chlorides and aggressive chemicals is common.

What is seamless stainless steel tubing?

Seamless stainless steel tubing is made by heating and piercing a solid stainless steel billet, then elongating it through extrusion or drawing to create a smooth, hollow tube without any weld seam. The seamless construction provides superior strength, durability, and corrosion resistance, making it ideal for high-pressure and high-temperature applications. Its uniform structure ensures consistent performance, reliability, and excellent resistance to rust and oxidation in demanding industrial environments.

Does 314 stainless steel tube rust?

No, 314 stainless steel tube does not rust under normal conditions due to its high chromium, nickel, and silicon content. These elements form a protective oxide layer on the surface, providing excellent resistance to corrosion and oxidation even in high-temperature environments.