Lucky charm coin
| Chemical designation | Lucky charm coin |
|---|---|
| Etching | 3% Nital |
The small lucky charm was a gift from the chimney sweep.
The inside is made of ferritic steel (hardness 130 HV 0.2) and was punched out of a metal sheet. The coin is copper-plated and coated with brass on the outside for the golden colouring.
Edge zone
1.0718 | 11SMnPb30 +C carbonitrided
Hot-dip galvanising
Ir-MMO coatings on titanium anodes
1.8519 | 31CrMoV9 +QT Long-term plasma-nitrided
1.8550 | 34CrAlNi7-10 +QT Long-term plasma-nitrided
1.2343 | X38CrMoV5-1 +QT Long-term plasma-nitrided
1.1181 | C35E +N nitrocarburized
1.1181 | C35E +N gas nitrided
1.7225 | 42CrMo4 +HL nitrocarburised