Stainless steel 301 and 301L belong to the same family of austenitic steels, both composed of chromium (16–18%) and nickel (6–8%), but with differences in carbon content. Grade 301 has a higher carbon content, which provides greater mechanical strength and hardness after cold working, but slightly reduces its corrosion resistance and weldability.

Grade 301L has a lower carbon content, which improves weldability, ductility, and resistance to intergranular corrosion, making it more suitable for welding processes and applications in more humid environments. In summary, 301 is recommended for structural components that require high strength, while 301L is preferred when better workability and corrosion protection are desired.