SLD8 Hitachi metals are SLD (JIS SKD11) the improved version.
Due to changes in the amount of vanadium, the workability is remarkably?.
Toughness more than 50 percent better than the SLD.
The resistance to temper softening respect to 530 ℃ tempering can still get HRC62-63 hardness.
Using this feature, for deformation and aging? Rupture and deformation of cutting have all been suppressed.
Uses:
Mainly used in precision metal molding or other requirements of precision parts toughness and high wear resistance and mold.
Features:
Good toughness, high hardness heat treatment, cutting | 
