ASTM A249 TP304 Welded Austenitic Stainless Steel Tube - Seamless Welded Construction for Boiler, Superheater, Heat Exchanger & Condenser Applications
ASTM A249 TP304 Welded Austenitic Stainless Steel Tube - Seamless Welded Construction for Boiler, Superheater, Heat Exchanger & Condenser Applications
YUHONG Group, with over 35 years of industrial expertise and a global network serving 85 countries, is a specialized manufacturer of high-performance stainless steel tubing. Our ASTM A249 TP304 Welded Tubes are produced under strict quality control, meeting international standards for critical applications in boilers, heat exchangers, and condensers. We ensure full traceability and reliability for global projects, delivering tubes that combine excellent corrosion resistance with proven durability in demanding environments.
Chemical Composition Requirements (TP304 - UNS S30400)
|
Element |
Composition (%) |
| Carbon (C), max | 0.08 |
| Manganese (Mn), max | 2 |
| Phosphorus (P), max | 0.045 |
| Sulfur (S), max | 0.03 |
| Silicon (Si), max | 1 |
| Chromium (Cr) | 18.0-20.0 |
| Nickel (Ni) | 8.0-11.0 |
Mechanical Properties (TP304)
| Property | Requirement |
| Tensile Strength, min | 75 ksi (515 MPa) |
| Yield Strength, min | 30 ksi (205 MPa) |
| Elongation in 2 in., min | 35% |
| Hardness, max | 90 HRB |
Comparison Table: Welded Tubes (WLD) vs. Heavily Cold-Worked Tubes (HCW)
| Characteristic | Welded Tubes (WLD) | Heavily Cold-Worked Tubes (HCW) |
| Manufacturing Process | Automatically welded from flat-rolled steel with no filler metal. | Made from a welded tube that subsequently undergoes heavy cold working. |
| Cold Working Requirement | Cold worked after welding (method may be specified by purchaser). Minimum reduction can be specified. | Not less than 35% reduction in cross-sectional area (both wall and weld) prior to final anneal. |
| Weld Inspection | Not explicitly required by the base standard prior to cold working. | 100% radiographic inspection of the weld is required before cold working, per ASME BPVC, Section VIII, Div. 1, UW-51. |
| Primary Standard | ASTM A249 (Welded Tubes) | ASTM A249 (Heavily Cold-Worked Tubes) |
Key Product Advantages
- Excellent General Corrosion Resistance: The TP304 grade provides reliable resistance to a wide range of corrosive environments, making it suitable for general-purpose applications in chemical processing, food industry, and water systems.
- Good Weldability and Formability: With balanced chemical composition, TP304 offers ease of welding and fabrication without significant risk of carbide precipitation, ensuring structural integrity in welded assemblies.
- High-Temperature Performance: Maintains mechanical strength and oxidation resistance at elevated temperatures, ideal for boiler and heat exchanger service up to specified limits.
- Cost-Effective Solution: As a standard austenitic stainless steel, TP304 provides a economical choice for many industrial applications while meeting ASTM A249 requirements.
- Quality Assurance: Manufactured in accordance with ASTM A249 standards, including hydrostatic testing, flattening tests, and hardness checks to ensure consistency and reliability.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.