Examinations at the material 1.7176
Treatment : 30 min. 850°
C / oil
Magnification : 500 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse / ASTM E 112
Testing result :
100 % martensitic microstructure
grain size : 10 - 12 (9)
single grains up to KG 9 ; up to 18 µm diameter
Treatment : 30 min. 850° C / oil +
tempered
Magnification : 500 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
ferrite free heat treated structure