Engine Valve Steel 33Cr23Ni8Mn3N=X33CrNiMnN238=1.4866=EV16=23-8N We can produce at Dia5.0mm-20.0mm. We, Jiangsu Shenyuan Special Steel Co., Ltd. can produce the material (engine valve steel) as following: GB ISO 68315:1992 EN 100901998 SAEJ775 JIS G 4311JASO E 101Abbreviated Name1 40Cr10Si2Mo X45CrSiMo10-21.4731HNV1SUH3-242Cr9Si2-----345Cr9Si3X45CrSi93X45CrSi9-31.4718HNV3SUH1-451Cr8Si2X50CrSi82-- ...