Hello,Everyone,I always confused when I find the "Ferritic Material" mentioned in ASME standard, i am wondering the exactly meaning of "Ferritic Material" ,is that refer to the material that contains ferritic phase? if that's true, i will think it includes "ferritic stainless steel". Is there any interpretation about such terms in ASME standards? Appreciate it!!

Ferrite or alpha iron (α-Fe) is a materials science term for iron, or a solid solution with iron as the main constituent, with a body centred cubic crystal structure

Ferritic material means carbon and low-alloy steels, higher alloy steels including all stainless alloys of the 4xx series, and maraging and precipitation hardening steels with a predominantly body-centered cubic crystal structure.

Stainless steels are primarily used when corrosion or oxidation is a problem. There are several important sub-categories of stainless steels; austenitic, martensitic, ferritic, duplex, precipitation hardening and super alloys.

Ferrite or alpha iron (α-Fe) is a materials science term for iron, or a solid solution with iron as the main constituent, with a body centred cubic crystal structure

Ferritic material means carbon and low-alloy steels, higher alloy steels including all stainless alloys of the 4xx series, and maraging and precipitation hardening steels with a predominantly body-centered cubic crystal structure.

Stainless steels are primarily used when corrosion or oxidation is a problem. There are several important sub-categories of stainless steels; , martensitic,, duplex, precipitation hardening and super alloys


Thanks,sooeey !
I have learn the different between "Ferrite" and "Ferrite material", and can I assume that "Ferrite material" includes the ferritic stainless steel.Is that right?

Yes

See general notes to Tables of Non-Mandatory Appendix A of ASME B31.1 to see which materials to be considered as ferritic e-g note (h) to Table A-1.

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Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402