... by our team of experienced professionals, our range of engine values always stand taller in terms of durability and ... IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). Engine valves are suitable for TOYOTA,AUDI,BESFORD,BMW,CATERILLAR,CUMMINS ... welding , small soldering terminal pin, small soldering alloy, shaft chromium-plating , surfacing nitration treatment.Of course , we can produce engine valves ...