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AISI 304 and AISI 304L are the most commonly used stainless steel alloys. AISI 304 is classified as an austenitic chromium-nickel stainless steel, whereas AISI 304L is a low carbon version of AISI 304.
AISI 304 is the most common type of stainless steel used for many applications due to its good corrosion resistance, excellent heat resistance and strength, and cost-effectiveness. It is ideal for a variety of different projects and uses such as automotive parts, medical equipment, applications that require welding, and industrial construction.
AISI 304 is composed of a few major elements: chromium (18-20%), nickel (8-11%), manganese (2%), and silicon (up to 2%). It also contains trace amounts of phosphorus, sulfur, calcium, and other elements. AISI 304 generally has high amounts of chromium, which helps give it its superior corrosion and heat resistance properties. The nickel and manganese components add to the strength of the material.
AISI 304L is the low-carbon version of AISI 304 and has many of the same properties; however, due to its low carbon content it has superior corrosion resistance and weldability. Lower amounts of nickel and chromium within AISI 304L, coupled with its low carbon content, mean that it is highly corrosion resistant. AISI 304L is ideal for deep-drawn parts, pharmaceutical and chemical equipment, and corrosion-resistant components in harsh environments.
AISI 304 and AISI 304L are essential materials for a number of industries and applications. Both materials offer superior corrosion and heat resistance, strength, and cost-effectiveness, which makes them suitable for a wide range of applications. While AISI 304 is commonly used for applications that do not need welding, the low carbon version, AISI 304L, is the ideal material for welding applications due to its superior corrosion resistance and weldability. It is also the favored material when it comes to components that must hold up against harsh environments.
