Ferritic steels are those steels with a Chromium content of between 16 and 18%, indicatively, and a very low Carbon content, usually less than 0.1%.
According to the AISI classification, ferritic steels (including Chromium martensitics) are identified by a 3-digit number: the first digit is 4, followed by a pair of digits that has no reference to the analysis of the material, but which simply serves to distinguish one type from another.
AISI 430 is doubtlessly the most common type of ferritic steel and the most used; it is easy to process when cold, with a lower hardening level than that of austenitic steels.
It has good corrosion resistance characteristics (lower than austenitic steels) both at ambient temperature and at higher temperatures, and resists heat and dry sulphurous gases.
Used in the automobile, househould appliance and chemical industries.

Euro
Norm

1.4016

UNI EN 10088-2

Aisi
Uni

430
X6 Cr 17

State
of the material

Recrystallized
at 780-820 °C

Mechanical characteristics

 Rm
Rs
A min.
HBmax 		450/600
0.2 min. 260
20
200

Characteristics

Ferritic stainless steel with 17% Cr.

Moderate weldability and resistance
to hot oxidation

Its resistance to corrosion is much higher than that offered by other stainless steels with 13% Cr

Uses

Interior architecture and decorations, food containers, bracketing systems for solar panels, cisterns, autoclaves, automobile industry, nuts, bolts and screws, minting coins, chemical and petrochemical industries

Legend
Rm = Resistance to tensile strength (Unit modulus of rupture) in N/mm2 (table UNI 556)
Rs = Yield point in N/mm2 (table UNI 556)
A = Percentage of elongation after rupture (table UNI 556)
HB = Brinell hardness value in N/mm2 (table UNI 560-75)


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