Why don't the car's bodywork need stainless steel?
1, cost: ordinary galvanized sheet DC51D+Z price is now more than 4000 yuan a ton, the good points of the double-layer galvanized steel plate in more than 6000, now 19000 tons of stainless steel, the average of a car with 1.2 tons of steel, 0.5 tons of car body may, with a stainless steel more than 3000 yuan, with an annual output of one million, is 3 billion;2, process: galvanized sheet is cold rolled base material, galvanized only, with deep stamping, stainless steel stamping performance is not good;3: Requirements: the domestic automobile factory generally requires ten years without corrosion, no perforation, the largest requirement in foreign countries is thirty years, usually 20 years.
1, the cost is too high, high quality stainless steel prices are too high2 、 the weight of stainless steel is too big3, stainless steel welding performance is poor, the strength of the solder joints can not meet the requirements
Mainly stainless steel ductility (jargon) is not enough! Not up to the processing requirements!In addition, the body material is also due to different parts of the intensity of the requirements of different! The cockpit requires the maximum possible deformation, and the Audi A8 cockpit is made of materials different from those of other parts of the aluminum alloy!In case of car collision, the engine compartment and the trunk are required to absorb the impact energy and relieve the impact force. So you need to make material that doesn't need too much strength! Therefore, stainless steel plate is not suitable for body steel plate!
