CLC 17-12-2L is one of the basic grade of the stainless steels range. The addition of molybdenum improves its resistance to pitting and crevice corrosion, compared to 304L.

CLC 17-12-2L is an austenitic microstructure grade, free of chromium carbide precipitations in grain boundaries and some residual ferrite after solution annealing (1050-1150°C - 1922-2102°F) and water quenching.

The CLC 17-12-2L steel resists to wet atmosphere solutions containing small chloride or fluoride additions at room temperature. The alloy may be used in diluted sulphuric acids at low temperature ( < 330°C - 626°F) as well as in sour organic solutions.