4.2.1 Ferritic Grades

Ferritic stainless steels are low carbon grades containing 10% to 30% chromium. Some grades additionally contain molybdenum, silicon, aluminum or titanium to develop special properties. The microstructures are basically ferrite with some scattering of finely distributed carbides. They exhibit excellent corrosion resistance and considerable ductility, can be worked hot or cold, and are relatively inexpensive. They cannot be hardened by heat treating, but strength can be increased moderately by cold working.

Ferritic stainless steels containing 16% to 18% chromium are generally the most useful alloys in this group. Chromium contents in the range of 15% to 30% are used to resist oxidizing at progressively higher elevated temperatures. Typical ferritic forging grades include:

SAE
No.
ASTM
Composition
405
409
429
430
446
A-473
A-473
A-473
A-473
A-473
12%Cr, 0.2%Al
11%Cr, 0.5%Ti
15%Cr,
17%Cr
25%Cr

While most other ferritic stainless grades are forgeable, they are not considered common forging grades.

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Ferritic stainless steels are low carbon grades containing 10% to 30% chromium. Some grades additionally contain molybdenum, silicon, aluminum or titanium to develop special properties. The microstructures are basically ferrite with some scattering of finely distributed carbides. They exhibit excellent corrosion resistance and considerable ductility, can be worked hot or cold, and are relatively inexpensive. They cannot be hardened by heat treating, but strength can be increased moderately by cold working.

Ferritic stainless steels containing 16% to 18% chromium are generally the most useful alloys in this group. Chromium contents in the range of 15% to 30% are used to resist oxidizing at progressively higher elevated temperatures. Typical ferritic forging grades include:

SAE
No.
ASTM
Composition
405
409
429
430
446
A-473
A-473
A-473
A-473
A-473
12%Cr, 0.2%Al
11%Cr, 0.5%Ti
15%Cr,
17%Cr
25%Cr

While most other ferritic stainless grades are forgeable, they are not considered common forging grades.

Return to Table of Contents

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Ferritic stainless steels are low carbon grades containing 10% to 30% chromium. Some grades additionally contain molybdenum, silicon, aluminum or titanium to develop special properties. The microstructures are basically ferrite with some scattering of finely distributed carbides. They exhibit excellent corrosion resistance and considerable ductility, can be worked hot or cold, and are relatively inexpensive. They cannot be hardened by heat treating, but strength can be increased moderately by cold working.

Ferritic stainless steels containing 16% to 18% chromium are generally the most useful alloys in this group. Chromium contents in the range of 15% to 30% are used to resist oxidizing at progressively higher elevated temperatures. Typical ferritic forging grades include:

SAE
No.
ASTM
Composition
405
409
429
430
446
A-473
A-473
A-473
A-473
A-473
12%Cr, 0.2%Al
11%Cr, 0.5%Ti
15%Cr,
17%Cr
25%Cr

While most other ferritic stainless grades are forgeable, they are not considered common forging grades.

Return to Table of Contents

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