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P/M Ferritic Stainless Steels for Exhaust System Components
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Abstract
The advent of stainless steel automotive exhaust systems presents a significant opportunity for powder metallurgy (P/M) parts and the inherent economic advantages of this near net shape metalworking technology. A study was performed to determine the viability of ferritic P/M stainless steel parts for exhaust applications such as coupling flanges and hot exhaust gas oxygen sensor (HEGOS) bosses.
In order to help achieve the automotive industry's stated goal of extending the functional life of exhaust components while remaining competitive, the authors developed a program to develop a database of the mechanical properties and performance characteristics of several grades of P/M stainless steel. Among the data generated and analyzed for these ferritic alloy systems are room temperature, tensile stress-strain curves, fatigue and endurance properties, hardness levels, and corrosion resistance. The objective of this body of work (and continuing efforts) is to determine which corrosion-resistant P/M materials provide the best combination of performance characteristics and economic advantage to meet the demands of the automotive industry for exhaust system applications.
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Citation
Baran, M., Shaw, B., Segall, A., Kopech, H. et al., "P/M Ferritic Stainless Steels for Exhaust System Components," SAE Technical Paper 970282, 1997, https://doi.org/10.4271/970282.Also In
References
- Lee, Pamela Ford Motor Company “Requirements for automotive engine applications for stainless steel P/M material,” MPIF Stainless Steel Short Course Raleigh, NC April 1996
- Sedriks J.A. Corrosion of Stainless Steels John Wiley & Sons New York 231 262 1996
- Streicher M.A. Corrosion Tests and Standards Baboian R. ASTM Philadelphia 197 202 1995