Stainless steel materials in the automotive industry

With the development of the automobile industry, stainless steel in the automobile industry is increasingly widely used, the scope of application is not limited to decoration, has been extended to the frame, exhaust system, engine parts.At present, a family car consumes about 20 to 30kg of stainless steel, Japan in the early 1990s, the annual stainless steel used in the automobile industry is about 100,000 to 130,000 tons.

Stainless steel automobile frame automobile frame or high-speed passenger car body shell, has been successfully manufactured by the stainless steel containing 11% to 12% Cr, life expectancy of at least 10 to 20 years. These grades include 409 (00Cr11Ti), 40800Cr12TiNbAlAM363 (0Cr11Ni4Ti), 00Cr12NiTi and so on. The latter in South Africa, the United Kingdom, Australia, Belgium and other countries have been used in large buses, coal transportation vehicles, urban subway vehicles and a variety of sweepers, sprinklers, trailers, etc., sometimes used in combination with 06Cr19Ni10 stainless steel. It is expected that the demand for such stainless steel in Europe will reach 1 million tons. Proof of use: after running 1.2 million kilometers, the exposed part of the frame is still in excellent condition, by the stone collision caused by the coating flaking of the exposed part of no signs of corrosion. The unprotected parts of the car show no signs of corrosion and the surfaces are as smooth as ever.

Exhaust system with stainless steel pipe and related stainless steel materials, automotive exhaust system has been changed from aluminum-plated materials to stainless steel materials to ensure that the operation of 5 years without maintenance requirements, from the economic and practical point of view, the general selection of 0Cr11Ti (409) type of ferritic stainless steel, while the Japanese are more grades, basically 13Cr ~ 17Cr ferrite stainless vanadium and its improved type, in some parts also The use of Cr-Ni austenitic stainless steel, the current automotive exhaust system steel profile is shown in Table 6-1-14. In the world, Europe and the United States mainly use 409 ferritic stainless steel, only North America's annual demand for 400,000 tons, the U.S. Nucor in the CSP line to produce 400,000 tons of cold-rolled sheet for the automotive industry each year.