材质：JIS-FDAC
热处理方式：调质及表面氧化
硬度：内部HRC40°±2°表面HV1000±100
特点：本产品除具有SKD-61调质氮化后的耐磨损及耐腐蚀外。更从引进台湾搪磨机及自动定寸内孔研磨机。经过台湾数控深孔钻机加工，同心度可达到5um以内且可保证内孔平直度及光滑度。
适用：高温压铸模锌铝合金模、电木模、高产量注塑模等高温作业环境（6000℃发下）的模具。
本厂有DEM、HASCO、DAIDO、RABOURDINCUMSA、STRACK、MISUMI、PROGRESSIVE等标准。
另代理日本大同厂生产大同牌司筒,大同顶针司筒是采用日本耐热钢制成,表面氮化硬度为HV850°-1100°(HRC65-80)内部硬度HRC35°-40°.
Daido EJECTOR SLEEVES are made of hot alloy tool. By nitriding, the surface has hardness850～1,100 Vickers(approx.65～80HRC),while having the inside hardness of about 40HRC. The inside surface is finished by precision lapping The surface of the sleeve doby isprecision groung.