Ferritic steels
Ferritic steels are used in many of the same applications as austenitic steels,in the
food, chemical and cellulose industries. However, there are some applications in which
their performance is superior,for use in sulphurous atmospheres, in which the pres-
ence of nickel reduces the resistance to corrosion, and in environments with modest
chloride concentrations, where ferritic steels have better resistance to stress corrosion.
The main alloying element in ferritic steel is chromium, in proportions between 12 %
and 30 %. Carbon content is generally less than 0.1 %.There are also Extra Low Inter-
stitial (ELI) steels, with very low carbon and nitrogen concentrations, of less than
0.03 %, having better corrosion performance than normal ferritic steels and better
ability. Ferritic steels are magnetic and non-hardenable.
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