347 Stainless Steel Tubing
Considered a stabilized austenitic stainless steel, 347 SS offers enhanced resistance to intergranular corrosion at high temperatures. 347 (UNS designation S34700) stainless tubing’s performance at high temperatures is due to the addition of tantalum and columbium (niobium) which bind carbon atoms that would otherwise remain in solution and form chromium carbides at high temperatures. Chromium carbides are undesirable because they translate into intergranular corrosion, where corrosion occurs at grain boundaries.
347 shares similar performance qualities to 321 stainless steel. Mechanically, it can be cold worked to similar tempers as the other 300 series stainless sheets of steel with good strength characteristics. It can be fabricated using subtractive manufacturing methods like grinding, turning, milling, or more modern technologies like EDM, ECM, and laser fabrication.
347 SS Tubing Features & Applications
347 stainless tubing offers good corrosion resistance to nitric acids and is often used in applications requiring repeated heating in the range of 800 - 1650 F (427-899 C) such as:
- Expansion joint tube assemblies
- High-temperature gaskets / o-rings,
- Aerospace engine parts
- Exhaust manifolds
- Other high-temperature applications
- Chemical production equipment.
347 stainless tubing is welded from strip stock, plug drawn in coil form, annealed as needed in order to meet customer temper requirements, and offered in straight lengths or coil form.
VIEW STAINLESS STEEL TUBING SIZES
Learn more about the most popular and widely used dimensions in the industry.