ASTM A249 TP304 Welded Heat Exchanger Tube
UNS Number：S30400
Steel Type：Austenitic Stainless Steel
Surface Finish：BA (Bright Annealed), AP (Annealed & Pickled), 2B
Outside Diameter (OD)：6.35–76.20 mm
Wall Thickness：0.5–3.0 mm
Length：Up to 18 m or U-Bent; 3 m, 6 m, 12 m, or Customized
Tube Type：Straight Tube / U-Bend Tube
Weld Type：Longitudinal TIG Welded
Tube Ends：Plain End, Deburred
Material Certificate：EN 10204 3.1 / 3.2
Packing：Plastic Caps, Woven Bags, Wooden Cases, Export Seaworthy Packing
What is the difference between ASTM A249 and ASTM A269?
ASTM A249 TP304 welded tubing is an austenitic stainless steel product specifically manufactured for applications involving boilers, superheaters, heat exchangers, and condensers. Unlike general-purpose tubing (ASTM A269), the A249 standard imposes stricter testing requirements for pressure-retaining components; these include mandatory flattening, flaring, and hydrostatic tests performed on every single tube.
ASTM A249 TP304 Stainless Steel Welded Tube Supplier
ASTM A249 TP304 stainless steel tubing contains 18%–20% chromium and 8%–11% nickel, offering excellent oxidation resistance and resistance to mild chemical corrosion; however, it is susceptible to chloride stress corrosion cracking in environments exceeding 140°F (60°C). It is typically produced with an outside diameter (OD) ranging from 1/8 inch (3.18 mm) to 5 inches (127 mm) and a wall thickness ranging from 0.015 to 0.320 inches (0.4 to 8.1 mm).
The ASTM A249 TP304 welded stainless steel tubing we supply is manufactured using welding processes (typically ERW or TIG). Compared to seamless tubing, it offers tighter wall thickness tolerances and greater cost-effectiveness, making it the preferred choice for large heat exchanger tube bundles. Furthermore, the tubing undergoes solution annealing at 1040–1100°C after welding to relieve welding stresses and restore the uniformity of the austenitic microstructure. It exhibits excellent high-temperature oxidation resistance, making it suitable for continuous service temperatures up to 1650°F (900°C) and intermittent service temperatures up to 1900°F (1040°C).
ASTM A249 Stainless Steel Tubes Specifications
ASTM A249 TP304 Stainless Steel Welded Tube Equivalent Grades
| JIS | ASTM | UNS | ISO | DIN EN/DIN | W-Nr. | EN | GOST | BS EN/BS |
| SUS 304 | 304 | S30400 | X5CrNi 18-10 | X5CrNi 18-10 (X5CrNi 18-9) |
1.4301 | X5CrNi 18-10 | 08Х18Н10 | 304S15 |
ASTM A249 TP304 Stainless Steel Welded Tube Chemical Composition
| Grade | C | Si | Mn | Cr | Ni | S | P | Fe |
| TP304 | 0,08 | 1,0 | 2 | 18 – 20 | 8 – 11 | 0,03 | 0,045 | Bal. |
ASTM A249 TP304 Stainless Steel Welded Tube Mechanical Properties
| Heat treatment/ condition | Tensile Strength Mpa |
Yield Point σs Mpa |
Elongation δ % |
HBW |
|---|---|---|---|---|
| Solutioning Temperature 1040℃ | ≥515 | ≥205 | ≥35 | HRB ≤90 |
Dimensional Tolerences
| Size OD | Nominal Wall | Outside Diameter | Length | Wall |
| 1/2" (12.7) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 3/4" (19.1) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 1" (25.4) | 0.065" (1.65)/0.049" (1.25) | +/-0.005 (0.13) | +1/8" (3.18) - 0 | +/-10.0% |
| 1-1/2" (38.1) | 0.065" (1.65)/0.049" (1.25) | +/-0.008" (0.20) | +1/8" (3.18) - 0 | +/-10.0% |
| 2" (50.8) | 0.065" (1.65)/0.049" (1.25) | +/-0.008" (0.20) | +1/8" (3.18) - 0 | +/-10.0% |
| 2-1/2" (63.5) | 0.065" (1.65) | +/-0.010" (0.25) | +1/8" (3.18) - 0 | +/-10.0% |
| 3" (76.2) | 0.065" (1.65) | +/-0.010" (0.25) | +1/8" (3.18) - 0 | +/-10.0% |
| 4" (101.6) | 0.083" (2.11) | +/-0.015" (0.38) | +1/8" (3.18) - 0 | +/-10.0% |
| 6" (152.4) | 0.083" (2.11) | +/-0.030" (0.76) | +1" (25.4) - 0 | +/-10.0% |
| 6" (152.4) | 0.109" (2.77) | +/-0.030" (0.76) | +1" (25.4) - 0 | +/-10.0% |
| 8" (203.2) | 0.109" (2.77) | +0.061" (1.55)/-0.031" (0.79) | +1" (25.4) - 0 | +/-10.0% |
What is the difference between ASTM A249 tp304 and TP316?
The difference lies in their chemical composition and corrosion resistance. ASTM A249 TP304 is a standard 18-8 chromium-nickel steel, making it highly versatile and cost-effective. TP316 contains 2% to 3% molybdenum, dramatically improving its resistance to pitting, chlorides, and high-temperature environments.
Common Applications
Boilers and Pressure Vessels
Heat Exchangers and Condensers
Petroleum Refineries and Chemical Processing Plants
Power Generation (Superheaters and Reheaters)
Could you please provide details regarding the project requirements so that I can offer the most suitable recommendations? For example: What are the specific dimensions (outer diameter, wall thickness, length) you require? What type of fluid or gas will be conveyed through the pipe? Do you need standard straight pipes or a U-bend configuration?
Every ASTM A249 TP304 Welded Heat Exchanger Tube is supplied with a complete documentation package, including EN 10204 3.1 Material Test Certificate (3.2 available upon request), chemical composition report, mechanical property test report, dimensional inspection report, hydrostatic or eddy current test report, and full traceability records.
Lead Time
Lead times depend on specifications, quantities, and whether additional post-processing (such as U-bending or special polishing) is required.
Lead time: 3–7 days – Applicable to standard specifications (e.g., OD 19.05mm, 25.4mm, 38.1mm; wall thickness 1.65mm, 2.11mm, etc.). Primarily involves packaging and final pre-shipment inspection.
Standard Production: Lead time: 25–40 days
Special Processing: Lead time: 45–60 days
If U-bending is involved: Additional time is required for bending, stress-relief annealing, and specialized airtightness testing.
Quality Inspection
Required TestsBecause these tubes operate in high-pressure and elevated-temperature environments, the specification requires rigorous quality assurance:Hydrostatic or non-destructive electric (Eddy current) testing to verify leak tightness.Mechanical tests, including flattening, flaring, and flange tests, to ensure the structural integrity of the weld.
Standard packaging
Each ASTM A249 TP304 stainless steel condenser and heat exchanger tube is fitted with protective plastic end caps to prevent contamination and mechanical damage during transit. The tubes are wrapped in a waterproof, moisture-resistant film and securely strapped with steel bands before being packed into sturdy fumigated wooden crates or export-grade plywood boxes to ensure optimal protection. Each package is clearly marked with the heat number, dimensions, specifications, quantity, and purchase order details to ensure full traceability.
Hot Tags: ASTM A249 TP304 Welded Heat Exchanger Tube, China ASTM A249 TP304 Welded Heat Exchanger Tube manufacturers, suppliers, factory, welded stainless steel pipe production, stainless steel welded tubing grade, Welded 304 Stainless Steel Tubing, stainless steel welded pipe standard, welded stainless steel tubing standard, welded stainless steel pipe thickness
You Might Also Like
Send Inquiry