Pre-material defect , cracks at the billet - 1.6582
Treatment : spheroidised
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
strong feathered pre-material defect 0,17 mm deep
strong, wedge-shaped decarburization in the surroundings
of the defect
Treatment : spheroidised
Magnification : 200 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
strong feathered pre-material defect 0,17 mm deep
strong, wedge-shaped decarburization in the surroundings
of the defect