409L Cold Rolled Stainless Steel Strip For Automotive Metal Bellows

Application scenarios
• Automobile exhaust system: As a connecting pipe and flexible joint between the exhaust manifold and the muffler, it is widely used in the exhaust systems of passenger cars and commercial vehicles, and is one of the mainstream materials for automobile exhaust bellows.
• Partial heat dissipation pipeline: In the low-temperature heat dissipation pipeline close to the engine, its temperature resistance and flexibility are used to adapt to the complex layout and vibration environment in the engine compartment.

Differences from bellows made of other materials
• Compared with 304 stainless steel bellows: 304 has better corrosion resistance and temperature resistance, but the cost is high and it is mostly used in high-end models or special environments; 409L has a higher cost performance and is suitable for popular models while meeting the basic needs of automobile exhaust.
• Compared with ordinary carbon steel bellows: 409L has much better corrosion resistance than carbon steel, which can significantly extend the service life of the exhaust bellows (usually up to 5-8 years, carbon steel only 2-3 years), and reduce the frequency of maintenance and replacement.

In summary, 409L automotive bellows has become the mainstream choice for balancing performance and cost in automobile exhaust systems due to its cost performance and adaptability.