SLD8 
 Chemical composition: 
 C of Cr of Mo Si Mn 
 Patented steel 


 Japan's Hitachi SLD8 is more extensive use of the improved type of cold 
 Tool steel with high wear resistance, high toughness, good processability, chemical composition of SLD8 mold steel: of C - Cr-Mo-V high-temperature tempering mold the steel 1.SLD8 specialty: high-temperature tempering hardness up to HRC62 above ; high strength, good wear resistance; 
 High toughness, the toughness the SKD11 of 2; EDM and wire cutting 
 High degree of stability; a substantial increase in the cutting and grinding; heat treatment and surface 
 Deal with excellent performance. 2.SLD8 purposes: blanking, fine blanking, finishing mold; cold heading, cold forging dies; shear blades, 
 The thread rolling die; high abrasion and plastic mold. 3.SLD8 heat treatment: annealing the raw materials have been spheroidized annealing, and so no longer have the ball of degradation. The use of re-forging, forging please implementation spheroidization annealing, 830 ~ 880 ° C, Xu cold. Reduce the heat to remove or soften the stress of cold working or machining, 
 Deformation and stress relief annealing should be carried out, the heating temperature of 650 ~ 700 ° C, heating time 
 1h/25mm.