Adinox Overseas is a reputed international supplier and exporter of high-quality Stainless Steel 347H Tubes, designed for conditions involving high temperature and high pressure. SS 347H, also recognized by its designator S34709, is a columbium (niobium) enriched austenitic stainless steel alloy that possesses improved resistance to intergranular corrosion. The grade is a high-carbon variant of the material Stainless Steel 347 particularly designed for optimum creep resistance and enhanced performance under high temperature conditions.
Our ASTM A213 TP347H Tubes are carefully made from the best raw material so that there is superior structural stability and long service life even in extremely demanding applications. The presence of niobium in the composition of the alloy ensures superior resistance to precipitation of the chromium carbide, which proves to be very useful in service temperatures above 537°C. All such characteristics lead 347H Stainless Steel Tubes to be the material of preference for application in heat exchangers, superheaters, petrochemical refineries, and boilers.
The columbium addition to Stainless Steel 347 seamless pipes serves as a stabilizer, which protects against precipitation of the chromium carbide during exposure to high temperatures. Such a property enables the material to be resistant to corrosion and mechanical strength in long term exposure to heat, as compared to non-stabilized grades like 304. Due to the excellent formability and weldability, the material is widely used in fabrication applications demanding superior integrity and durability.
Adinox Overseas offers a broad spectrum of SS 347H Tubes in welded, seamless, ERW, and fabricated types as per international standards like ASTM A213, ASTM A269, and others. The tubes are highly corrosion-resistant to oxidation, sulfidation, and other types of corrosion at high temperatures. We specifically recommend our 347H tubes for applications in aggressive thermal conditions like thermal power plants, furnace applications, chemical process, and aerospace applications.
We serve both domestic and foreign markets with Stainless Steel 347H Tubing in different sizes, thicknesses, and lengths to accommodate a multitude of applications. With strong warehousing and export packaging facilities, we facilitate timely dispatch and secure transportation to all the world's continents. Tubes are available from us in annealed, pickled, polished, or as per custom surface finishes as directed by the customers.
| International Specification | ASTM A312/ ASME SA 312 TP 347H |
|---|---|
| Seamless Pipes Size |
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| Welded Pipe Size |
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| EFW Pipe Size |
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| Wall Thickness | Schedule 5, Schedule 40, Schedule 10, Schedule 80, Schedule 160, Schedule 80S, Schedule XXS, Schedule XS |
| Techniques | EFW / Seamless / ERW / Welded / LSAW / Fabricated / Seam-Welded / CDW / Redrawn |
| Form | Round, Square, Rectangular |
| Length | Double Random & Required Length End, Single Random, Plain End, Threaded, Beveled End |
| Condition | Hot Finished, Annealed and Pickled, Bright Annealed, Polished, Cold Drawn |
| Stainless Steel | Nickel | Magnesium | Silicon | sulfur | Carbon | Chromium | Phosphorus | Molybdenum | Nitrogen | |
|---|---|---|---|---|---|---|---|---|---|---|
| 347H | Minimum | 9 | 00.04 | 17 | 3 | |||||
| Maximum | 13 | 2 | 1 | 00.030 | 00.10 | 19 | 00.045 | 4 | ||
| SS Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
|---|---|---|---|---|---|
| Rockwell B | Brinell | ||||
| SS 347H | 515 | 205 | 40 | 92 | 201 |
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