ASTM A213 TP310S Seamless Boiler Tube

ASTM A213 TP310S Seamless Tube is an austenitic stainless steel seamless tube specially designed for high-temperature boilers, heat exchangers, and high-temperature process equipment. Containing 24–26% Cr and 19–22% Ni, its low-carbon chemistry (C ≤ 0.08%) reduces the risk of intergranular corrosion sensitization during long-term high-temperature service, making it particularly suitable for piping systems operating in high-temperature oxidizing atmospheres and thermal cycling environments.

The high chromium content of 310S stainless steel tubing enables the formation of a stable chromium-rich protective oxide film, while its high nickel content helps maintain austenitic structural stability. Consequently, its high-temperature capability is significantly superior to conventional austenitic stainless steels such as 304 and 316, rendering it suitable for high-temperature operating conditions within approximately 1000–1100°C, with specific operating temperatures determined by media, stress, thermal cycling, and design life.

Our supplied ASTM A213 TP310S seamless boiler tubes are manufactured using hot-rolled, cold-rolled, or cold-drawn seamless processes, with dimensional accuracy and microstructural stability controlled through billet piercing, rolling/cold drawing, heat treatment, and surface treatment. The seamless structure eliminates potential localized performance variations found in weld zones, making it suitable for tube expanding, flanging, cold bending, and subsequent processing. According to your project requirements, annealed and pickled or bright annealed surface finishes can be provided, with ends processed into plain ends, beveled ends, or threaded connections; tube bending and custom length processing can be executed based on customer drawings and actual design requirements.

ASTM A213 TP310S Seamless Stainless Steel Tube

ASTM A213 TP310S Seamless Boiler Tube

To clarify details or identify suitable materials,

could you please provide the following information?
What are the operating temperature and pressure of your system?
What specific outside diameter and wall thickness do you require?
Do you need certified mill test reports (EN 10204 3.1) or materials cut to specific lengths?

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Quality Control

 Each batch of TP310S stainless steel tubes can be provided with EN 10204 3.1 material certificates and heat number traceability information, ensuring full traceability of chemical composition, mechanical properties, and production batches. Routine inspections include 100% hydrostatic testing, dimensional checks, visual inspection, and PMI alloy composition verification. According to project requirements, non-destructive testing such as ultrasonic testing (UT) and radiographic testing (RT) can also be added. For pressure equipment and boiler projects, relevant ASME BPVC Section I material compliance documentation and project quality records can be provided in accordance with procurement technical specifications, with full support for project documentation systems such as PED based on customer requirements.

 

310S pipe PMI

Dimensional Measurement

Hydrostatic pressure test

 

Standard export packaging

Hexagonal bundling
 

Plywood crate packaging

pipe cap protection

What are the differences between 310S and 310?

The Cr and Ni ranges of 310 (UNS S31000) and 310S (UNS S31008) are basically the same, both being 24–26% Cr and 19–22% Ni. The main difference lies in the carbon content; 310 has a maximum of 0.25%, while 310S has a maximum of 0.08%. Therefore, 310S is more suitable for welding and high-temperature corrosive environments, while 310 focuses more on high-temperature strength.

How to choose between 310S and 314 (310Si2)?

The Si content of 310S is usually limited by standards, while 314 (commonly known as 310Si2/1.4841) has approximately 1.5–2.5% Si and 24–26% Cr, 19–22% Ni, emphasizing high-temperature oxidation resistance and carburization resistance. 314 is preferred for continuous high-temperature oxidation conditions; 310S is more suitable when weldability and ASTM A213 boiler tube standards are required.

How to weld 310S? What welding materials are used?

310S is an austenitic stainless steel, typically welded using TIG, MIG/MAG, or manual arc welding. During welding, heat input and interpass temperature must be controlled to reduce the risk of hot cracking. Commonly used welding materials include ER310, ER310S, and the E310 series; the specific choice should be determined based on the base material, welding method, and project WPS/PQR.

How much does 310S boiler tube cost per ton?

The price per ton for 310S stainless steel boiler and heat exchanger tubes generally ranges from $1,050 to $13,000 USD per ton, depending heavily on whether the tubing is seamless or welded, manufacturing standards, and current supplier quotes.

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