ASTM A249 Welded Austenitic Steel Boiler Superheater Heat Exchanger and

Shaanxi Shangyou Stainless Steel Co., Ltd. supplies ASTM A249 welded austenitic steel boiler, superheater, heat exchanger, and condenser tubes for global boiler manufacturers, power generation equipment fabricators, heat exchanger producers, and EPC contractors requiring reliable welded tubing for elevated-temperature and heat-transfer service. Produced to ASTM A249/A249M, this specification covers nominal-wall-thickness welded tubes and heavily cold worked welded tubes made from austenitic steels.

ASTM A249 is the standard specification for welded austenitic steel tubes intended for use as boiler tubes, superheater tubes, heat exchanger tubes, and condenser tubes. The tubing is manufactured from flat-rolled stock by an automated welding process and is furnished in the heat-treated condition to ensure corrosion resistance and mechanical properties are fully restored. The specification covers sizes from 1/8 in. [3.2 mm] inside diameter to 12 in. [304.8 mm] outside diameter and wall thicknesses from 0.015 to 0.320 in. [0.4 to 8.1 mm]. Grades designated with an "H" suffix (TP304H, TP316H, TP321H, TP347H, etc.) are modifications intended specifically for high-temperature service such as superheaters and reheaters.

ASTM A249 welded tubes are specified for heat-transfer applications requiring corrosion resistance and mechanical integrity at elevated temperatures.

Typical applications include:

• Boiler tubes and waterwall panels in power generation
• Superheater and reheater tubes in steam systems
• Heat exchanger tubes in chemical and petrochemical processing
• Condenser tubes in power plants and industrial cooling systems
• Feedwater heaters and process heaters
• Waste heat recovery units

Key selection considerations: Select L-grade (TP304L, TP316L) when welding is required and sensitization is a concern; the low carbon content prevents chromium carbide precipitation in the heat-affected zone. Choose H-grade (TP304H, TP316H, TP321H, TP347H) when the tube will be used at sustained elevated temperatures where creep strength and stress-rupture performance are required; H-grades have controlled higher carbon content for enhanced high-temperature strength. TP321 and TP347 are titanium- and niobium-stabilized grades for service where intergranular corrosion resistance is required in the 800-1500°F range. The heat-treated condition is mandatory for all tubes under A249, ensuring optimal corrosion resistance and mechanical properties.

Shangyou Stainless Steel provides value-added processing including custom cutting, beveling, and end protection.

All tubes are packed with export-standard protection including protective end caps, steel strapping, waterproof wrapping, and wooden pallets or steel frames.

Quality documents include MTC 3.1, inspection reports, packing list, and heat number traceability. Third-party inspection (SGS, TUV, BV) can be arranged upon request.

1. What is ASTM A249?

ASTM A249 is the standard specification for welded austenitic steel tubes for boiler, superheater, heat exchanger, and condenser applications.

2. What size range does ASTM A249 cover?

1/8 in. [3.2 mm] inside diameter to 12 in. [304.8 mm] outside diameter, with wall thickness from 0.015 to 0.320 in. [0.4 to 8.1 mm].

3. What is the difference between ASTM A249 and ASTM A269?

ASTM A249 is specifically for boiler, superheater, heat exchanger, and condenser tubes with heat treatment required; ASTM A269 covers general service seamless and welded tubing.

4. What are H-grade tubes?

H-grades (TP304H, TP316H, TP321H, TP347H) are modifications of standard grades intended for high-temperature service such as superheaters and reheaters.

5. Is ASTM A249 tube heat treated?

Yes, all material shall be furnished in the heat-treated condition.

6. What grades are available under ASTM A249?

TP304/L/H, TP316/L/H, TP321/H, TP347/H, TP309H, TP310H, and others.

7. What is the difference between TP304L and TP316L?

TP316L contains 2-3% molybdenum for improved pitting resistance in chloride environments; both have low carbon for weld corrosion resistance.

8. What testing is required for ASTM A249?

Tension, flattening, flange, reverse-bend, hardness, hydrostatic or NDE testing, and grain size determination.

9. What documents are provided with delivery?

MTC 3.1, inspection reports, packing list, and heat number traceability.

10. What are typical applications for A249 tubes?

Boilers, superheaters, heat exchangers, condensers, power generation, chemical processing.

Need ASTM A249 welded austenitic steel tubes for boiler, heat exchanger, superheater, or condenser applications? Send requirements including grade, OD/wall thickness/length, quantity, and intended service temperature.

Shangyou Stainless Steel provides custom sizes, processing, and export solutions for global B2B customers.