Sintered stainless steel is used in systems requiring high corrosion resistance at both ambient temperature and high temperature.
The typical materials used to make sintered stainless steel parts are:
Austenitic stainless steels (300 series). These have the greatest corrosion resistance. The most common ones are grades 304 and 316 for applications subjected to aggressive corrosive conditions, and grade 303 for easy machining. Grade 310 is used as refractory stainless steel. These steels are non-magnetic. Their hardness and mechanical strength can be increased by modifying the sintering conditions, but some corrosion resistance is lost.
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Ferritic stainless steels (400 series). These are magnetic and less corrosion-resistant than austenitic steels. Grade 434 is used for high corrosion resistance. Grade 409 is used for high oxidation resistance at high temperature and good weldability.
Martensitic stainless steels (400 series). These are used when the critical parameter is the hardness. The typical grade is 410 with heat treatment or sinterhardening. It has a very high hardness and is magnetic. It is less corrosion- resistant than ferritic stainless steel.
AMES, as a specialist in the manufacturing of sintered stainless steel, has developed the Ames-SSP® process, which enables materials to withstand more than 2,000 hours in a salt spray chamber.
AMES has special equipment for developing, manufacturing and characterizing suitable materials for corrosion resistance: salt spray chamber, high-temperature oxidation tests, cyclic corrosion tests, C and N analysers, metallographic bench with SEM, and high temperature sintering furnaces.
Common applications of sintered stainless steel include the following:
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