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Stainless Steel , a modern material in view of its attractive combination of mechanical and corrosion resistance properties, has found a large array of usages in the Automobile Industry, as to be expected in spite of its cost higher than regular steels. Stainless steel wire is used in a wide range of applications, including the following:

Automobile fasteners

Fasteners is a generic wording for a range of parts used to link or fasten in place several components of a vehicle: this covers bolts, nuts,washers and rivets usually cold headed from stainless steel wire rod or drawn wire. According to ASTM A193, there is a wide range of grades used in automobile fasteners. The most common are 302HQ, 304L, 316L, 410, and 409Cb. Also used for restraining systems and brakes is 17-4 (grade 630). Noteworthy the substantial use of high temperature “super stainless” A286 (grade 660) for exhaust manifold safety bolts : this very same grade is a common use in Aerospace applications. In addition, 409Cb bolts are used in the exhaust line.

Exhaust line

The development of use of stainless steel in car exhaust systems started in the USA and Germany in the 1980’s with the catalytic converters, then spread out in all the Automotive Industries , with also usage in all components of the exhaust line from manifolds to tail pipes. The prevalent grade for pipes and converters shell is the low-grade 409 Ti; this has brought a large usage of grade 409Cb welding wire for the components of the exhaust line, as well as use of 409Cb large size wire for exhaust systems hangers. Some exhaust lines make use of ferritic grade 439, and hence welding wire 439 Cb. There are several other applications, including:

  • Knitted mesh is used in exhaust line spacers, support matts, and muffler packing.
  • “Silencer steel wool”: stripped from ferritic grade 434 drawn wire
  • Other car uses include the following:
  • Air bag safety systems: knitted fine wire pads are used as filters to protect the air bag from explosive cartridge residues.
  • Fine stainless wire braiding for reinforcing and protecting gasoline and brake hoses
  • Different stainless steel wires utilized in a wide range of operational purposes
  • Windshield wiper flat stainless steel wire


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