The invention relates to lightweight components of hybrid design, also termed hybrid component or hollow-chamber lightweight component, composed of a parent body which is composed of galvanized iron and which is reinforced by means of thermoplastics and is suitable for the transmission of high mechanical loads. The invention also relates to a use of lightweight components in the automobile industry and non-automobile industry, preferably in a motor vehicle, a rail vehicle, a aircraft, a ship, a slide plate or other transport means, and a use in a power or electronic equipment, a household equipment, a furniture, a heater, a motor scooter, a shopping cart, a rack, a stair, an automatic ladder step and a manhole cover. The invention further relates to a vehicle or other transport means, preferably to a motor vehicle, a rail vehicle, a aircraft, a ship, a slide plate or a motor scooter, comprising the lightweight components of hybrid design, wherein the lightweight component is composed of a parent body which comprises a galvanized iron and a thermoplastics, characterized in that the thermoplastics is polyamide.