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 HV 0.05. The electrogalvanizing was combined with a yellow passivation (containing chrome).
Edge zone
1.7035 | 41Cr4 nitrocarburised
EN AW-5754 | AlMg3 anodised
1.0503 | C45E salt-bath nitrocarburised
1.0060 | E335 salt-bath nitrocarburised
1.0050 | E295 Salt-bath nitrocarburised
1.2316 | X38CrMo16 +QT short-time nitrided
Lucky charm coin
1.0718 | 11SMnPb30 +C carbonitrided
Hot-dip galvanising
Ir-MMO coatings on titanium anodes