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

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

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

(OP)
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

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

Yes, this a ferritic material

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

(OP)
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

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

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.

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