Spax screw
| Chemical designation | Spax-Schraube |
|---|---|
| State | Rolled thread |
| Etching | 3 % Nital |
Rolled, quenched and tempered and yellow zinc-plated screw, the hardness is 440 HV0.05. The electrogalvanizing was combined with a yellow passivation (containing chrome).
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
1.7225 | 42CrMo4 +HL gas-nitrided