MITSUBISHI Intake And Exhaust Valves 4G61 4G63-TC 4G64 MD127847 MD127840

Material of Engine Valves

Normal material: INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2).

Good material: INLET VALVE IS SUH3(4Cr9Si2) ; EXHAUST VALVE IS SUH35(21-4N)

Technology

1.Forging blank

2.800 ~1200Centigrade high temperature treatment

3.The inlet end of high-frequency quenching hardness, improve the tail, tail HRC hardness up to 48 ° ~55°, reduce end fracture and shorten service life

4.Surface nitridation processing, processing depth 0.008mm, nitriding colored grey, rust and increase the

surface hardnes