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Introduction
ASTM A249 / A249M covers welded austenitic stainless steel tubes intended for boilers, superheaters, heat exchangers, and condensers. These tubes are designed for high-temperature and corrosive environments, offering excellent corrosion resistance, strength, and long service life.
ASTM A249 stainless steel tubes are widely used in industries where resistance to oxidation, scaling, and chemical exposure is essential, especially in heat transfer and pressure applications.
Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ASTM A249 / A249M welded austenitic stainless steel tubes, providing high-quality tubes for critical industrial applications.
Applicable Standard
Standard Specification: ASTM A249 / A249M
Organization: ASTM International
Title: Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
This specification covers welded stainless steel tubes for use in high-temperature and corrosive service conditions.
Forms of Supply
ASTM A249 stainless steel tubes are supplied in the following forms:
Welded tubes
Straight length tubes
U-bend tubes
Cut-to-length tubes
Supply Condition
Solution annealed
Heat-treated condition
Pickled and passivated
Surface Finish
Annealed and pickled
Bright annealed
Polished (if required)
Standard Sizes
Outside Diameter: 6 mm to 101.6 mm
Wall Thickness: 0.5 mm to 8 mm
Length: Up to 12 meters or as required
Grades Covered Under ASTM A249 / A249M
TP304
TP304L
TP316
TP316L
TP321
TP347
These grades are austenitic stainless steels with varying levels of chromium, nickel, and molybdenum to enhance corrosion resistance and high-temperature strength.
Chemical Composition of ASTM A249 Stainless Steel Tubes (%)
Grade | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Nitrogen (N) | Copper (Cu) | Other |
TP304 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 8.0–11.0 | — | — | — | — |
TP304L | ≤0.030 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 8.0–12.0 | — | — | — | — |
TP316 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — | — | — |
TP316L | ≤0.030 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — | — | — |
TP317 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 | — | — | — |
TP317L | ≤0.030 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 18.0–20.0 | 11.0–15.0 | 3.0–4.0 | — | — | — |
TP321 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Ti (5×C min) |
TP321H | 0.04–0.10 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Ti |
TP347 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Nb (10×C) |
TP347H | 0.04–0.10 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Nb |
TP348 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Nb+Ta |
TP348H | 0.04–0.10 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.00 | 17.0–19.0 | 9.0–12.0 | — | — | — | Nb+Ta |
Alloy 20 | ≤0.07 | ≤2.00 | ≤0.045 | ≤0.035 | ≤1.00 | 19.0–21.0 | 32.0–38.0 | 2.0–3.0 | — | — | Nb |
904L | ≤0.020 | ≤2.00 | ≤0.040 | ≤0.030 | ≤1.00 | 19.0–23.0 | 23.0–28.0 | 4.0–5.0 | — | 1.0–2.0 | — |
926 | ≤0.020 | ≤2.00 | ≤0.030 | ≤0.010 | ≤0.50 | 19.0–21.0 | 24.0–26.0 | 6.0–7.0 | 0.15–0.25 | 0.5–1.5 | — |
800 | ≤0.10 | ≤1.50 | ≤0.045 | ≤0.015 | ≤1.00 | 19.0–23.0 | 30.0–35.0 | — | — | — | Fe balance |
800H | 0.05–0.10 | ≤1.50 | ≤0.045 | ≤0.015 | ≤1.00 | 19.0–23.0 | 30.0–35.0 | — | — | — | Al, Ti |
800HT | 0.05–0.10 | ≤1.50 | ≤0.045 | ≤0.015 | ≤1.00 | 19.0–23.0 | 30.0–35.0 | — | — | — | Al+Ti control |
Mechanical Properties
Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
TP304 | ≥ 515 | ≥ 205 | ≥ 35 |
TP304L | ≥ 485 | ≥ 170 | ≥ 35 |
TP316 | ≥ 515 | ≥ 205 | ≥ 35 |
TP316L | ≥ 485 | ≥ 170 | ≥ 35 |
Key Features of ASTM A249 Stainless Steel Tubes
Excellent corrosion resistance
High-temperature strength and oxidation resistance
Superior surface finish
Good weldability and formability
Resistance to scaling in elevated temperatures
Suitable for aggressive chemical environments
Long service life with low maintenance
Applications of ASTM A249 Stainless Steel Tubes
ASTM A249 tubes are widely used in industries requiring corrosion resistance, heat resistance, and reliable performance under pressure.
Power Plants
• Boiler tubes
• Superheater tubes
Heat Exchangers
• Condenser tubes
• Heat transfer systems
Chemical & Petrochemical Industry
• Process piping
• Heat recovery systems
Food & Pharmaceutical Industry
• Sanitary heat exchangers
Oil & Gas Industry
• Refinery heat exchangers
Heat Treatment
Tubes are solution annealed to improve corrosion resistance
Heat treatment removes residual stresses from welding
Ensures uniform microstructure and enhanced durability
Conclusion
ASTM A249 / A249M welded austenitic stainless steel tubes offer an excellent combination of corrosion resistance, strength, and heat resistance for critical applications in boilers, superheaters, heat exchangers, and condensers. These tubes are ideal for industries requiring reliable performance in harsh environments.
Ladhani Metal Corporation supplies ASTM A249 / A249M stainless steel tubes in various grades and sizes, ensuring high-quality solutions for power plants, chemical processing, and industrial heat transfer systems.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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