Product Overview – ASTM A269 TP347H Welded Tubes
ASTM A269 TP347H welded stainless steel tubes are specifically engineered for high-temperature industrial systems that demand strong mechanical stability and corrosion resistance.
TP347H is a high-carbon version of 347 stainless steel,which improves creep resistance and mechanical strength when the material is exposed to prolonged elevated temperatures. The addition ofniobium (columbium)stabilizes the steel structure and prevents chromium carbide formation during welding or thermal exposure.
These welded tubes are manufactured using precision stainless steel strip forming and automatic welding techniques. Following welding, the tubes undergo solution annealing, pickling, and quality inspection procedures to ensure consistent metallurgical properties and dimensional accuracy.
Because of their thermal stability and corrosion resistance, ASTM A269 TP347H welded stainless steel tubes are widely used in refinery process systems, petrochemical plants, industrial boilers, heat exchangers, and power generation equipment.
Standard & International Identification - ASTM A269 TP347H Welded Tubes
Technical Specifications – TP347H Welded Tubes
| Tube Type: | Welded Stainless Steel Tubes |
| Manufacturing Process: | Cold Rolled Stainless Steel Strip → Automatic Welding → Solution Annealing → Pickling & Passivation |
| Outer Diameter: | 6 mm to 114 mm |
| Wall Thickness: | 0.5 mm to 6 mm |
| Length Options: | Random / Cut Length / Custom Fabricated Tubes |
| Surface Finish: | Bright Annealed / Pickled & Annealed / Polished Finish Available |
| Testing & Inspection: | Hydrostatic Test, Eddy Current Test,Flattening Test, PMI, Flaring Test |
| Certification : | EN 10204 3.1 / 3.2 MTC |
Third Party Inspection Available
All specifications are in accordance of ASTM A269 / ASME SA269 standards. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition – Stainless Steel TP347H Welded 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 (Nb + Ta): | 10 × C Minimum |
| Iron : | Balance |
Note: The higher carbon content improves strength and creep resistance at elevated temperatures.
Mechanical Properties – ASTM A269 TP347H Tubes
| Property | Minimum Value |
|---|---|
| Tensile Strength | 515 MPa |
| Yield Strength | 240 MPa |
| Elongation | 35% |
These mechanical characteristics provide durability and stability in high temperature industrial applications.
Corrosion Resistance of SS 347H Tubes
SS 347H welded tubes provide reliable corrosion resistance combined with strong thermal stability.
Key benefits include:
These characteristics make TP347H stainless steel tubing suitable for heavy duty thermal processing equipment.
Major Industrial Applications of TP347H welded stainless steel tubes
- ASTM A269 TP347H welded stainless steel tubes are widely used in:
- 🔸Petrochemical Processing Plants
- 🔸Oil Refineries
- 🔸Power Generation Equipment
- 🔸Industrial Boilers and Superheaters
- 🔸Heat Exchanger Systems
- 🔸High Temperature Process Pipelines
Understanding Stainless Steel Grades ?
have a look what experts says !