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Guide to know about Stainless Steel 321 Pipes

Stainless Steel 321 Pipes

by nikashwini
  • Stainless steel has grown in importance and is now one of the most popular and widely used metals on the planet. It does not corrode, rust, or stain like regular steel. This is why Stainless Steel is used in so many of our tools and equipment nowadays. Its resistance to corrosion and staining makes it suitable for a wide range of applications.
  • 321/321H Stainless Steel

321 Stainless Steel is an austenitic stainless steel with a low titanium content that improves corrosion resistance. It is resistant to intergranular corrosion after temperature holding in the chromium carbide deposition range of 800 to 1500 degrees F. (427 to 816 degrees C).

321H stainless steel is a higher carbon version of 321 stainless steel (0.04–0.10). It is designed to increase strength and withstand temperatures above 1000 degrees Fahrenheit (537 degrees C). In most cases, the plate’s carbon content allows for dual certification.

321 stainless steel pipes have good overall corrosion resistance, similar to 304. It is intended for use in the chromium carbide deposition range of 1800 to 1500 degrees F (427-816 degrees C), where unstable alloys such as 304 are susceptible to intergranular attack. The alloy can be used in most dilute organic acids at moderate temperatures, pure phosphoric acid at lower temperatures, and diluted solutions up to 10% at high temperatures. Even at low concentrations, SS 321 does not perform well in chloride solutions or sulfuric acid.

Only cooling can harden SS 321. It can be welded and processed efficiently using standard manufacturing techniques.

  • SS 321/321H Tube Specifications-
  • To 1600 degrees F, oxidation is resistant.
  • Intergranular corrosion in the weld heat-affected zone (HAZ) has been stabilised.
  • Polyphonic acid stress corrosion cracking is resistant.
  • SS 321/321H Pipe Applications-
  • Manifolds and exhaust stacks for aircraft piston engines.
  • Joints for expansion.
  • Thermochemical oxidizers
  • Refinery machinery.
  • Chemical process equipment for high temperatures.
  • Food processing and storage equipment

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