Product Overview – ASTM A213 TP347H Seamless Tubes
ASTM A213 TP347H seamless tubes are high-temperature stainless steel tubes specifically engineered for industrial systems exposed to prolonged heat and pressure.
The “H” grade contains higher carbon content compared with standard TP347, which significantly improves creep resistance and high-temperature mechanical strength.
The addition of niobium (Nb) stabilizes the stainless steel microstructure and prevents chromium carbide precipitation during welding and long-term thermal exposure.
TP347H seamless tubes are manufactured using precision cold drawing and hot finishing techniques to achieve excellent dimensional tolerance, smooth internal surfaces, and strong structural integrity.
Because of their excellent thermal stability and corrosion resistance, ASTM A213 TP347H tubes are widely used in boilers, superheaters, refinery furnace components, petrochemical plants, and thermal power generation systems.
Standard & International Identification - ASTM A213 TP347H Seamless Tubes
Technical Specifications – TP347H Seamless Tubes
| Tube Type: | Seamless Stainless Steel Tubes |
| Manufacturing Process: | Cold Drawn / Hot Finished |
| Outer Diameter: | 6 mm to 273 mm |
| Wall Thickness: | 1 mm to 30 mm |
| Length Options: | Random / Cut Length / U-Bend Tubes |
| Surface Finish: | Bright Annealed / Pickled & Annealed |
| Testing Standards: | Hydrostatic Test, Eddy Current Test,Ultrasonic Testing, PMI |
| Certification : | EN 10204 3.1 / 3.2 MTC |
Third Party Inspection Available
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 – Stainless Steel TP347H 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): | 17.0-19.0% |
| Nickel (Ni): | 9.0-13.0% |
| Niobium + Tantalum (Nb + Ta): | 10 × Carbon minimum to 1.0% |
| Iron : | Balance |
Note: The increased carbon content enhances high temperature strength and creep resistance.
Mechanical Properties – ASTM A213 TP347H Tubes
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 205 MPa |
| Elongation | 35% |
These mechanical properties ensure excellent performance under thermal stress and high pressure conditions.
High Temperature Performance of SS 347H Tubes
SS 347H tubes are designed for long-term exposure to elevated temperatures.
Key thermal advantages include:
These properties make TP347H an ideal material for thermal power plants and refinery process units.
Major Industrial Applications of TP347H Seamless Tubes
- ASTM A213 TP347H seamless stainless steel tubes are widely used in:
- 🔸Boiler and Superheater Systems
- 🔸Petrochemical Refinery Units
- 🔸Heat Exchanger Equipment
- 🔸Power Generation Plants
- 🔸Chemical Processing Industries
- 🔸Industrial Furnace Components
Understanding Stainless Steel Grades ?
have a look what experts says !