Applicationt: 
Mitsubishi
Production Description:
valve seat(6D22):with high attrition endurance,high temperature endurance,high concussion endurance and high erosion endurance.
Valve Seat
Material: High Chrome Molybdenum Cast Iron Alloy.
Its the advanced technology introduced from UnitedKidom Institute of
internal-combustion engine and the latest formula developed by Shanghai
internal-combustionengine institute under the actual situation of China.
Function:1)High attrition endurance,
2)High temperature endurance
3)High erosion endurance.
4)Can be used 150--300 thousand kilometre.
REMARKS:The normal valve seat is made by Powder mMllurgy.
Just can be used 30--50 thousand-kilometre.