Hello all, I have two analysis of two samples of parts of a farming machinery and I want you to help me to find what type of steel are. Here you will find the results of the chemistry.
SAMPLE ONE: 0.366 C; 0.77 Mn; 0.256 Si; 0.011 P; 0.036 S; 0.81 Cr; 0.085 Ni; 0.014 Mo; 0.262 Cu; 0.004 Al...
Attached you will find three micrographs of a punching die, made of a gray cast iron (GGG60), that was gas nitrided for 60 Hr, at 520 C; whit ammonia dissociation of 30%.
The surface shows a flaky appearance and spalls easily, in some areas it seems like blisters. I think the porosity on the...
