This relates to an aluminium alloy, a method for producing a lightweight metal workpiece, a lightweight metal workpiece comprising the aluminium alloy, and also the use of the aluminium alloy for producing heat-resistant lightweight metal workpieces by means of additive layer manufacturing (ALM) and/or spraying methods or for engine components, cylinder heads, crank housings, heat-resistant safety component parts, air-conditioning system components, structural aircraft component parts, in particular in the case of supersonic aircraft, power unit segments, pylons, or as coating material for component parts.