Increasingly restrictive regulations in terms of emissions (CO2) have prompted car manufacturers to revise the standards of production of exhaust systems and opt for the use of more valuable steels, i.e. stainless steels.
The exhaust is a more complex system than you might think and is often mistakenly associated with the simple concept of a silencer: in reality even very sophisticated components such as the lambda sensor are part of the exhaust system.
For the construction of the various components that constitute an exhaust system, both standard ferritic steels and ferritic steels with a particular analytical balancing with increased corrosion resistance and the solderability are used, as well as the most common austenitic steels, as versions of the latter with improved machinability are commonly used as high micro cleanliness is not required for such applications.
|Valbruna Grade||Steel type||W.N.||AISI||UNS||EN||BS|
|MVAISL||Austenitic Stainless Steel||1.4301/1.4307||304/304L||S30400/S30403||X5CrNi18-10/X2CrNi18-9||304S15/304S31|
|VPAU188Z||Austenitic Stainless Steel||1.4305||303||S30300||X8CrNiS18-9||303S31|
|X17L||Ferritic Stainless Steel||1.4016||430||S43000||-||430S11 / 430S18|
|X17NBL||Ferritic Stainless Steel||1.4511||-||-||X3CrNb17||-|
|X17Z/DE||Ferritic Stainless Steel||1.4104||-||-||X14CrMoS17||-|
|X7AL||Ferritic Stainless Steel||1.4713||-||-||X10CrAlSi7||-|