Pre-material defect on the billet - 1.7034
Treatment : spheroidised
Magnification : 12,5 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
pre-material defect - scab 0,55 mm deep
strong decarburization at the defect
Treatment : spheroidised
Magnification : 50 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
pre-material defect - scab 0,55 mm deep
strong decarburization at the defect