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Exhaust Valve Seat Inserts

Many of the characteristics for the intake valve seat inserts carry over to the exhaust valve seat inserts. In addition, the exhaust valve seat uses what is known as "Grade J" steel, this contains molybendum and tungsten. This provide high heat hardness giving increased resistance to indentation and wear.

Powder Technology 

A shape is produced from powdered metal by filling a rigid die with a blended powder and applying pressure. The pressure causes the powder particles to be forced together in an interlocking of particles similar to a weld. After being pressure formed the parts are heated to 80% of the boiling point of the metal. The heat increases the bonds between the particles and further strengthens the part.

To increase thermal conductivity the pores of the powder compact are infiltrated with copper during the sintering process.

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