Why the letters P, C and M in the Pcm carbone equivalent ?

[stanislasdz]

Why the letters P, C and M in the Pcm carbone equivalent ?

Just for my knweldge :

Many thanks for HELP !

 

[metengr]

stanislasdz;
This expression was developed by the Japanese steel industry in the mid-1970's.

The P stands for parameter
cm refers to crack model

This crack parameter expression was developed to evaluate susceptibility to cracking of steels using an expression similar to the carbon equivalence equation. I have attached some references for your reading pleasure.

http://www.google.com/search?hl=en&q=cracking+parameter+Pcm+&btnG=Google+Search&aq=f&oq=

 

[stanislasdz]

Great !!!!!