409 stainless steel is the ferritic stainless steel commonly used in mechanical and construction engineering. Due to the presence of austenite grain, its mechanical properties are greatly improved. Moreover, due to the addition of a lot of alloy elements, the strength and hardness have been greatly improved.
409 stainless steel, the cheapest type (Britain and America), usually used as car exhaust pipe, is ferritic stainless steel (chromium steel).
409 Chemical Composition:
409 stainless steel is commonly used in machinery, construction and other engineering ferrite stainless steel. Because of the presence of austenite grain, its mechanical properties are greatly improved. And because a lot of alloying elements are added, the strength and hardness are greatly improved. Usually used as automobile exhaust pipe, ferritic stainless steel (chrome steel)