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31-17-352 Micrograph

 

Inv. 31-17-352
Needle/pin shaft
Section of thicker end: magnification, 200x (left) and 400x (right)
Etchant: Ammonium hydroxide + hydrogen peroxide + alcoholic ferric chloride
(Sn, <0.018%; As, 0.30%; Ni, 0.11%)

A description of the microstructure is in preparation.

Microhardness: VHN: 72 ± 4 (n=4)
Variability due to corrosion