The pitting resistance of Stainless Steel Grade 1.4539 Seamless Pipes is outstanding when this alloy is used in neutral chloride containing media. Not only is Grade 904l welded pipe resistant to crevice corrosion and stress-related corrosion cracking, but it's also suitable for use in sulfuric acid solutions at varying concentrations below 70 degrees Celsius. Because the carbon content of ASTM A312 uns n08904 1.4539 pipes is minimal, they are resistant to carbide precipitation, even when subjected to general heat treatments or welding processes.
Intergranular corrosion, which might develop following general heat treatment or welding operations, is therefore eliminated. The specified grade SA 312 uns n08904 Electropolished Pipes can be passivated even in reducing acid containing settings such as sulfuric acid and formic acid because of the increased amounts of all three elements, chromium, nickel, and molybdenum, as well as the addition of copper.