Stainless Steel 304/304L Seamless Pipe

The most commonly used stainless steel alloy of this type is Stainless Steel 304/304L Seamless Pipe, which is one of the most versatile alloys on the market. Grade 304 is an austenitic chromium alloy, which is also known as an “18/8” stainless steel since it contains 18% chromium and 8% nickel. As a result of its high chromium content, the material offers considerable resistance to corrosion and oxidation. While stainless steel alloys are resistant to most oxidising acids and can withstand ordinary rusting, they may tarnish over time. In order to increase the steel’s tensile strength, it must be cold worked. Post-weld annealing may be required for stainless steel sections that are heavily welded.

As a lower carbon variant of Grade 304, Type 304L can be welded without causing carbon precipitation (chromium carbide precipitation occurs during the welding process due to the heat applied, which depletes the steel’s chromium element, reducing its anti-corrosion and oxidation properties.). Therefore, Type 304L stainless steel is highly sought after in severely corrosive environments. There are a variety of commercial sectors, particularly in the chemical industry, in which this steel grade is used. Weld annealing is only necessary when there are excessive stress loads.