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409L
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409L stainless steel is an ultra-low-carbon, titanium (Ti)-stabilised ferritic stainless steel. It stands unrivalled as the most widely used material in automotive exhaust system manufacturing due to its outstanding high-temperature oxidation resistance, thermal fatigue resistance, and significant cost advantages.
Core characteristics:
Exceptional high-temperature oxidation resistance and thermal fatigue endurance: Maintains a stable surface oxide layer during repeated heating-cooling cycles (as encountered in automotive exhaust conditions), resisting spalling and cracking, with a service life substantially exceeding that of carbon steel.
Superior formability and weldability: Extremely low carbon content combined with titanium stabilisation confers excellent machinability and weldability, making it ideal for fabricating complex exhaust components.
Exceptional cost-effectiveness: Being nickel-free, it offers a significant cost advantage over austenitic heat-resistant steels like 304, m
Core characteristics:
Exceptional high-temperature oxidation resistance and thermal fatigue endurance: Maintains a stable surface oxide layer during repeated heating-cooling cycles (as encountered in automotive exhaust conditions), resisting spalling and cracking, with a service life substantially exceeding that of carbon steel.
Superior formability and weldability: Extremely low carbon content combined with titanium stabilisation confers excellent machinability and weldability, making it ideal for fabricating complex exhaust components.
Exceptional cost-effectiveness: Being nickel-free, it offers a significant cost advantage over austenitic heat-resistant steels like 304, m
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Product Details: Its lower chromium content renders it unsuitable for structural or decorative applications in highly corrosive environments such as coastal regions. However, its composition is optimised specifically for the high temperatures and corrosive conditions encountered in automotive exhaust systems.Application Areas: 409L stainless steel exhibits highly concentrated and irreplaceable applications: Automotive Industry: Core material for automotive exhaust systems, primarily used in manufacturing: - Exhaust manifolds; - Front silencers (front mufflers); - Three-way catalytic converter housings; - Exhaust pipes. Other Industrial Sectors: - Heat exchanger components; - Burner components; - Agricultural machinery carburettors.