Feb
21
Array
Filed Under Chevy Cars
The titanium exhaust system on the Z06 is the single largest contributor to weight reduction from the previous year’s hardtop model. Titanium saved 8.2 kg on the Z06, moving the car toward its weight reduction goal of 72.6 kg.
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Titanium’s natural oxide layer provides virtual immunity to corrosion from road salts and sulfur-rich engine exhaust gases. TIMET says that tests conducted over a number of years have found nothing that will cause corrosion failure, making the expected ten-year warranty requirement by the U.S. Environmental Protection Agency for entire exhaust systems easily accessible. Stainless-steel exhaust systems have a typical life cycle ranging from five to ten years.
Cost has been the primary factor limiting the widespread use of titanium in the auto industry. The key to lower titanium costs for automobiles is that the metal can be rolled, formed, and fabricated on available high-volume steel production equipment. ArvinMeritor successfully adapted its existing stainless steel stamping, bending, cold forming, and welding equipment to accommodate fabrication differences between stainless steel and titanium, demonstrating that production of titanium parts for the automotive industry does not require new equipment, only special tooling and the knowledge of titanium’s own fabricating characteristics.
