SK700 series, the materils are halogen free spcial powder alloy for making screw which are imported from Japan and Germany. Through 1180℃ vacuum quenching and 3 times of 570℃ tempering, four hours one time. The hardness is 55-60HRC, perfect function of toughness and softening resistance in high termperature, super function of wear and corrosion resistance. Alloy composition: C:2.3, Cr:23, Mo:1.3, Si:1.3, W:3.2, V:8.9, Co:4.6

Perfect wear and corrosion resistance fit for halogen free engineering plastic+65%GF high temperature environment.Appliction for raw material: PPS halogen free+50%GF,PA9T halogen free+50%GF,PAT halogen free+50%GF,PA66 halogen free+65%GF, LCP halogen free, PPT halogen free+50%GF,PEEK,fluoroplastics,magnetic powder