FLAME METALLURGICAL, INC.
Empirical relationships for the effect of alloying elements in hypoeutectoid
steels (< 0.77% Carbon) on austenite and martensite transformation
temperatures have been described by Andrews.

Input the concentrations of the alloying elements , wt% (example %C=0.20) below:
%C%Mn%Si%Ni%Cr%Mo%V

Ac1 =  °F temperature that austenite begins to form on heating.
Ac3 =  °F temp on heating that ferrite to austenite transformation is complete.
MS =  °F temperature that martensite begins to form on cooling.
M10 =  °F temperature 10% martensite formation on cooling.
M50 =  °F temperature 50% martensite formation on cooling.
M90 =  °F temperature 90% martensite formation on cooling.
MF =  °F temperature that martensite formation is completed.

( note : Arsenic and Tungsten were excluded from the calculations above)