Material number 1.1213
Treatment : spheroidised
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
stronger surface decarburization 0,24 mm deep
complete decarburization 0,02 mm and
grain boundary oxidation 0,01 mm deep
Treatment : spheroidised
Magnification : 500 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse / SEP1520
Testing result :
FA 1.9 CG 2.1 - 2.4 PA
3.3
small sulfides in the microstructure