ASTM A249 Welded Stainless Steel Tubes

For Boiler, Superheater, Heat-Exchanger, and Condenser

As an ASTM A249 stainless steel tube supplier, YES Stainless International manufactures welded and heavily cold-worked austenitic tubing for heat exchangers, condensers, superheaters, and boilers. Our A249 tubes are bright/solution-annealed with tight dimensional control and clean end prep for reliable tube-sheet expansion and welding. Each lot includes EN 10204 3.1 MTC, with optional hydrostatic or eddy-current (ECT) testing, PMI, cut-to-length service, and export-ready packaging.

What is ASTM A249?

ASTM A249 is the specification for nominal-wall welded and heavily cold-worked welded austenitic stainless steel tubes used in thermal-duty service (heat exchangers, condensers, superheaters, boilers). It defines chemical composition, post-weld cold work before final heat treatment (a core requirement for weld integrity), heat treatment, dimensional tolerances, and qualification tests—including flattening, flange, reverse-bend, hardness/tension, and 100% hydrostatic or ECT. Common grades include 304, 304L, 316, 316L, 321, 347, etc.

Product Overview of ASTM A249 Stainless Steel tube

Stainless Steel Grade	Dimension	Surfaces
TP304, TP304L, TP316L, SUS304TB	OD: 12.7~114.3mm WT: 1.2~2.11mm Standard Length: 6M	AP, BA, Mechanical polish/Electropolish on request.

Key Features of ASTM A249 Stainless Steel Tube

Built for thermal duty: ASTM A249 stainless steel tubes are manufactured for heat exchangers, condensers, superheaters, and boilers, delivering stable performance under pressure and repeated thermal cycling.
Weld integrity by design: The weld is cold-worked before final heat treatment—a core ASTM A249 requirement—which refines the weld zone, increases strength, and supports reliable tube-sheet expansion.
Heat-treated for consistency: Tubes are supplied solution- or bright-annealed to ensure a uniform microstructure, strong corrosion resistance, and dependable mechanical properties.
Tight dimensional control: OD, wall thickness, ovality, and straightness are tightly controlled to enable precise tube-sheet rolling/expansion, leak-tight joints, and consistent fit-up.
Verification and inspection: Qualification includes flattening, flange, reverse-bend, hardness, and tension tests, with 100% hydrostatic or eddy-current (ECT) testing provided to order requirements.

Product Specification of ASTM A249 Stainless Steel Tube

Outside Diameter		Thickness (mm)
inch	mm	1.2	1.25	1.5	1.6	1.65	2.0	2.11
½'’	12.7	●	●	●	●	●	●	●
⅝’’	15.9	●	●	●	●	●	●	●
¾’’	19	●	●	●	●	●	●	●
⅞’’	22.2	●	●	●	●	●	●	●
1'’	25	●	●	●	●	●	●	●
-	28	●	●	●	●	●	●	●
1 ¼’’	32	●	●	●	●	●	●	●
-	35	●	●	●	●	●	●	●
1 ½’’	38	●	●	●	●	●	●	●
2'’	51	●	●	●	●	●	●	●
-	52	●	●	●	●	●	●	●
2 ½’’	63.5	●	●	●	●	●	●	●
-	70	●	●	●	●	●	●	●
3'’	76.2			●	●	●	●	●
-	85			●	●	●	●	●
3 ½’’	88.9			●	●	●	●	●
4'’	101.6			●	●	●	●	●
-	104						●	●
4 ½’’	114.3						●	●

FAQs

1. Can you certify to ASTM A249 / ASME SA-249 and apply the general requirements of ASTM A1016/A1016M?

Yes. We certify ASTM A249 (ASME SA-249) and apply ASTM A1016/A1016M general requirements for ordering, tolerances, testing, marking, and certification. Each lot is supplied with EN 10204 3.1 MTC and full heat/lot traceability.

2. What OD × wall ranges and lengths can you supply for heat-exchanger/boiler service?

We manufacture to your OD × wall specification across common heat-exchanger sizes, with straight lengths typically up to 6 m (20 ft) and custom lengths on request.

3. Can you supply nominal-wall and minimum-wall options, and what tolerances do you hold on OD, wall, ovality, and straightness?

Yes. nominal-wall and minimum-wall options are available. Tolerances on OD, wall, ovality, and straightness are controlled per ASTM A249/A1016

4. Are tubes solution-annealed or bright-annealed (BA), and can you provide heat-treatment charts on request?

Both solution-annealed and bright-annealed (BA) finishes are available. Heat-treatment charts/records can be included in the documentation pack upon request.