Productname:Bimetallicscrewsandbarrels ScrewDiameter:Φ10mm-Φ300mm Material:38CrMoAlA;SKD61;SKD11;40Cr;42CrMo;highqualityalloysteel Technology:nitridingtreatment,alloycoatingspraying,heat-treatment Appliance:PVC,PP,PE,PA,PC,ABS,ASetc TechnicalIndex: DepthofNitratedLayer:0.5-0.8mm Hardnessofnitration:900-1020Hv Fragilityofnitration:Lessthangrade1 SurfaceHardnessofNitratedCrcoatinglayer:≥950Hv HardnessofBimetallicLayer:HRC55°-72° ThicknessofCr-coatingLayer:0.03-0.08mm DepthofBimetallicLayer:>2mm