Product Overview – ASTM A213 TP304H Seamless Tubes
ASTM A213 TP304H is the high carbon variant of 304 stainless steel specifically developed for high-temperature pressure applications. The increased carbon content enhances creep strength and strength retention at elevated temperatures.
These seamless stainless steel tubes are produced through hot finished or cold drawn processes without welding, ensuring uniform structure, high pressure tolerance, and dimensional precision required in boiler and superheater service.
TP304H seamless tubes are widely used in thermal power plants, refinery heater units, high-pressure steam pipelines, and industrial furnace systems.
Compared to TP304 and TP304L, TP304H provides superior performance in sustained high-temperature environments.
Standard & International Identification - ASTM A213 TP304H Seamless Tubes
Technical Specifications – TP304H Seamless Tubes
| Tube Type: | Seamless / Cold Drawn / Hot Finished |
| Outer Diameter Range: | 6 mm to 250 mm |
| Wall Thickness: | 1 mm to 25 mm |
| Length: | Random / Cut Length / U-Bend Tubes |
| Surface Finish: | Bright Annealed / Pickled & Annealed |
| Testing: | Plain End (PE), Beveled End (BE) |
| Testing: | Hydrostatic Test, Eddy Current Test, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
Suitable for High Pressure Boiler & Superheater Applications
All specifications are in accordance of ASTM A213 / ASME SA213 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition of ASTM A213 TP304H Seamless Tubes
(As per ASTM specification)
| Element | Max (%) |
|---|---|
| Carbon (C) | 0.04 – 0.10% |
| Manganese (Mn) | 2.00 % |
| Silicon (Si) | 1.00% |
| Phosphorus (P) | 0.045 % |
| Sulfur (S) | 0.030 % |
| Chromium (Cr) | 18.0 – 20.0% |
| Nickel (Ni) | 8.0 – 11.0% |
| Iron : | Balance |
Note: Higher carbon improves creep resistance at elevated temperatures.
Mechanical Properties – ASTM A213 TP304H Seamless Tubes
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35% |
TP304H retains strength and structural stability under prolonged high heat exposure.
Elevated Temperature Performance Benefits- ASTM A213 TP304H Seamless Tubes
SS 304H seamless boiler tubes offer:
For boiler components operating under heat stress, TP304H is often specified over standard 304 grades.
Major Industrial Applications of TP304H Seamless Tubes
- 🔸Boiler tubes
- 🔸Superheater tubes
- 🔸Heat exchanger systems
- 🔸Thermal power plants
- 🔸Chemical processing units
- 🔸Oil & gas industry
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