409L/S40903 steel is ultra-low carbon ferritic stainless steel with good oxidation resistance and good welding performance.
409L stainless steel has strong resistance to corrosion, high temperature and fatigue, which can extend the service life and reduce the weight of exhaust system components.
409L has strong high temperature resistance, can achieve high-efficiency engines and exhaust systems, and reduce the thickness of the exhaust system, which can reduce exhaust gas emissions.
409L has low cost, good flexibility, high yield rate, and is easy to replace. It is an environmentally friendly new product.
What is the difference between 409 and 409L stainless steel?
Chinese brand number of 409 stainless steel pipe: 0Cr11Ti.
Chinese brand number of 409L stainless steel pipe: 00Cr11Ti.
409 stainless steel pipe is corrosion-resistant and high-temperature resistant and is commonly used as automobile exhaust pipes.
409L stainless steel pipes are highly resistant to corrosion, high temperatures and fatigue, allowing for longer life and lighter weight of exhaust system components.
However, it is not entirely correct that car exhaust pipes are all made of 409 and 409L stainless steel. Now many high-end car exhaust pipes have begun to use exhaust pipes made of 304 stainless steel. Because 304 stainless steel is resistant to acid and alkali corrosion, oxidation and high temperature. Both are much better than 409 and 409L stainless steel. This is a trend.
