Submitted by curator on Thu, 10/15/2015 - 14:33
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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
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