Stainless Steel Seamless Pipe 347
Stainless Steel Seamless Pipe 347

Stainless Steel Seamless Pipe 347

Stainless Steel 347, also known as UNS S34700, is an austenitic stainless steel that belongs to the 300 series. It is a modification of the widely used 321 grade, with the primary difference being the addition of a stabilizing element – tantalum or columbium (niobium), in addition to titanium. This enhancement effectively controls carbide precipitation during welding and exposure to high temperatures, thereby maintaining the alloy's corrosion resistance and mechanical properties.

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Key Properties of Stainless Steel Seamless Pipe 347

High-Temperature Resistance: The primary advantage of stainless steel 347 seamless pipes lies in their exceptional resistance to intergranular corrosion at temperatures ranging from cryogenic to over 800 degree (1472 degree F). This feature makes it ideal for use in high-temperature environments such as petrochemical processing, power generation, and aerospace industries.

Excellent Weldability: The addition of tantalum or columbium along with titanium in the alloy composition ensures that stainless steel 347 seamless pipes can be welded without significant loss of corrosion resistance. This eliminates the need for post-weld annealing, a process often required with other stainless steel grades, thereby reducing production costs and time.

Superior Corrosion Resistance: Similar to other austenitic stainless steels, 347 exhibits excellent resistance to oxidation, pitting, and crevice corrosion in a wide range of environments, including mildly corrosive chemicals and marine atmospheres.

Strength and Durability: The seamless construction of these pipes, combined with the inherent strength of the 347 alloy, ensures high pressure and load-bearing capabilities, making them suitable for critical applications where reliability and safety are paramount.