Abstract: An aluminium alloy includes: 0.07% by weight to 0.17% by weight of silicon, 0.25% by weight to 0.45% by weight of iron, 0.02% by weight to 0.15% by weight of copper, 0.30% by weight to 0.50% by weight of manganese, 0.05% by weight to 0.20% by weight of chromium, 0.01% by weight to 0.04% by weight of titanium, and the balance aluminium and, optionally, additional constituents.

Abstract: A locking piece includes a housing which has a, in particular, rectangular housing opening and a slide which is arranged in the housing. At the housing side, the slide is guided so as to be able to be linearly displaced between two end positions and which has a locking arm which extends at right-angles with respect to the displacement direction of the slide and protrudes forward through the housing opening. A spring clip is arranged behind the slide, which spring clip extends in the displacement direction and which is anchored at the two clip ends thereof in the housing. The slide is arranged between the housing and the spring clip and is retained in abutment with the housing by the spring clip.

Abstract: An aluminium alloy includes: 0.07% by weight to 0.17% by weight of silicon, 0.25% by weight to 0.45% by weight of iron, 0.02% by weight to 0.15% by weight of copper, 0.30% by weight to 0.50% by weight of manganese, 0.05% by weight to 0.20% by weight of chromium, 0.01% by weight to 0.04% by weight of titanium, and the balance aluminium and, optionally, additional constituents.

Abstract: An aluminium alloy includes 0.07% by weight to 0.17% by weight of silicon, 0.25% by weight to 0.45% by weight of iron, 0.05% by weight to 0.20% by weight of copper, 0.30% by weight to 0.50% by weight of manganese, 0.05% by weight to 0.25% by weight of magnesium, 0.01% by weight to 0.04% by weight of titanium, and the balance aluminium and, optionally, additional constituents.

Abstract: A locking piece for a locking unit includes a housing having a housing opening. A locking arm, which engages through the housing opening, is mounted so as to be displaceable, in a direction at a right angle to its longitudinal direction, in the housing opening. A slide is guided displaceably in the housing in the displacement direction of the locking arm and is motion-coupled to the locking arm in the displacement direction. The housing and/or the slide are/is formed from magnetically attractable material. At least one magnet acts between the housing and slide and positionally fixes the locking arm in each possible displacement position within the housing opening.