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Wide application of stainless steel in the automotive industry

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Wide application of stainless steel in the automotive industry

May 24, 2019


In the past ten years, stainless steel has been widely used in buses, subways, high-speed railway vehicles and other means of public transportation in China. Aluminum alloy cars are selected for urban rail transit in Shanghai, guangzhou, wuhan and chongqing. Tianjin coastal rapid rail transit USES stainless steel cars; Beijing metro line 15 adopts the stainless steel subway vehicle products independently developed for the first time in China. The total number of trains on the line will reach 15, two of which will be ready vehicles.

Stainless steel has not only corrosion resistance, but also good physical properties and surface quality, widely used in automobile manufacturing, the application of the main components are the following categories.

1, exhaust system with stainless steel: most of the ferritic stainless steel, is the automobile stainless steel application most parts. 409L,436L, etc. are commonly used stainless steel. From the point of view of economy and practicability, some European and American countries often choose 0Cr11Ti type ferritic stainless steel for their exhaust system, while Japan basically USES 13Cr~17Cr ferritic stainless steel and its improved type.








2, automotive fuel tank with stainless steel: stainless steel fuel tank in addition to no fuel leakage risk, and has excellent corrosion resistance and good formability, and can save or simplify the coating process, and easy recovery. 304L, jfe-sx1, etc. are commonly used stainless steel.










3, car frame with stainless steel: combined with the excellent performance of the car frame design and stainless steel materials, can make the car anti-impact performance is good, light weight, high safety and reliability and long life, in addition, such a frame can also be completely recycled. 409L, 3Cr12, 304L are commonly used stainless steel.








4, automobile stainless steel parts: mainly stainless steel seal ring and heat exchanger, seal ring generally 301 stainless steel, heat exchanger generally use SUS304, SUS430 and SUS409L stainless steel materials; Cr-Ni austenitic stainless steel is also used on some parts. 0Cr17, 0Cr18Ni9 for oil cooler plate heat exchanger; 0Cr17 can be used for headlamp retainer, large bus handrails, safety railings, etc.









5, car decoration with stainless steel: small cars use stainless steel embedded strip, antenna, wheel cover, etc., in large buses, vehicles handrails, safety railings, hanging rod also use stainless steel. In order to reduce the cost, the rearview mirror is mainly made of SUS430J1L stainless steel. Automobile windshield wiper USES SUS430, SUS304, SUS301 and so on. Car safety devices are also often made of stainless steel. For example, the belt tightening device USES SUS301 stainless steel, the sensor of the air bag and the booster pump mainly use SUS304 and SUS304L stainless steel, ABS induction ring USES SUS434, SUS444 and other steel.



6. Automobile frame or overall shell: it is an automobile frame or overall shell made of stainless steel containing 11% ~ 12% Cr. The commonly used brands are 00Cr11Ti, 0Cr11Ni4Ti and 00Cr12NiTi. Some countries have used stainless steel in large buses, coal transport vehicles, urban subway vehicles and so on.











Automotive industry is the fastest growing stainless steel application field. Buses, subways, high-speed railway vehicles and other public transport vehicles have also widely used stainless steel. To increase market demand for high-grade car, considering the cost of manufacture, maintenance and energy consumption, stainless steel car significantly lower than that of aluminum alloy and carbon steel models, so the stainless steel car is the most economical vehicles, has great prospects for development, made of stainless steel used in automobile manufacturing industry showed a trend of worldwide expansion, has great potential market.

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