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Why doesn't auto sheet metal use stainless steel?

The sheet metal materials currently used in automobiles are basically cold-rolled base galvanized steel sheets, which have been stamped and formed many times. This requires that the materials must have good ductility and solidity, whereas the ductility and solidity of stainless steel are relatively small. Poor, poor stamping plasticity, it is difficult to meet the multiple stamping and complex forming process requirements.

Okay, now let's talk about the "another major reason" for using stainless steel as a material for subway cars. This is how the complexity of stamping in a square subway train cannot be compared with that of a car. Stainless steel can meet the requirements.

Moreover, the poor solid-solidity characteristics of stainless steel can also cause the car sheet metal to be difficult to repair to its original shape after being hit and scraped.

Of course, the cost is also a problem. The price of a traditional 0.8mm galvanized steel sheet is about 5,000 yuan per ton, and the price of stainless steel is basically 20,000 yuan per ton. If the bodywork is replaced with stainless steel, the cost per vehicle will increase by at least 100 yuan.

Of course, car companies do not use stainless steel to make metal body down. They are not afraid to bear such costs. After all, aluminum alloys and even aluminum-magnesium alloys are not too new to use in automobiles. More than 100 million vehicles do not use aluminum alloys. Stainless steel will not be considered.

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