ASME SECTION VIII, DIV. 1 UCS 66(c)

[mac10]

FERRITIC STEEL flanges for use at MDMT not colder than minus 20 degree F could be exempted from impact testing by paragraph UCS-66(c) of ASME code Section VIII, Div 1. Can someone help me with a definition of “ferritic Steel” according to the ASME code.? Can SA 105 be considered ferrict Steel?.

To complete the picture, I am not talking about ferritic stainless steel. The UCS-66(c) belong to part UCS: Carbon and Low Alloy Steel of the ASME code Section VIII, Div. 1.

Thanks in advance for he usual support.

Mac 10

 

[Carburize]

Yes, this a ferritic material

 

[mac10]

As far as I remember from my metallurgical lectures, to consider a carbon steel (SA 105 for example) a ferritic steel ( Fe-BCC) they must be normalized. If they are not normalized they are ferritic and perlitic steels . Can somebody throw light on this please.?
MAC10

 

[metengr]

If you are using ASME material specifications, ferritic steels are either annealed, normalized, or normalized and tempered. You do have other ferritic steels that can be quenched and tempered - these are a special class or heat treatable ferritic steels.