Enhanced Powder Metal Materials for Exhaust System Applications

Paper #:
  • 970281

Published:
  • 1997-02-24
Citation:
Albee, T., dePoutiloff, P., Ramsey, G., and Regan, G., "Enhanced Powder Metal Materials for Exhaust System Applications," SAE Technical Paper 970281, 1997, https://doi.org/10.4271/970281.
Pages:
7
Abstract:
Property test data shows 434 stainless steel material, with and without nickel additions, to be a desirable material for exhaust system component applications. The material provides a good balance of corrosion and oxidation resistance, impact strength, and tensile strength compared to other 400 series stainless steel powder metal (P/M) materials. Addition of nickel to standard 434 greatly improves many physical properties with a slight increase in cost. Parts with densities between 7.2 and 7.5 g/cc offer the best combination of properties versus process economics. The processing costs to achieve high densities are minimized when the parts are sintered at temperatures at or above 2400°F, thus eliminating the need for a secondary operation such as coining or heat treating.
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