Characteristics 1.Air cooling hardened hot work tool steel, most widely used hot work tool steel. 2.High toughness and cold and heat-fatigue resistance. 3.Excellent toughness hot fatigue resistance and certain abrasion resistance at medium temperature. 4.During air cooling, deformation and oxide skin tendency is small. Good resistance from the undermining of fusing aluminum. Chemical Composition: Standard Steel Grade C Si Mn P S Cr Mo V W DIN 1.2344 0.37-0.42 0.90-1.20 0.30-0.50 0.030 0.030 4.80-5.50 1.20-1.50 0.90-1.00 -¡¡ ASTM H13 0.32-0.45 0.80-1.20 0.20-0.50 0.030 0.030 4.75-5.50 1.10-1.75 0.80-1.20 -¡¡ GB 4Cr5MoSiV1 0.32-0.42 0.80-1.20 0.20-0.50 0.030 0.030 4.75-5.50 1.10-1.75 0.80-1.20 -¡¡ Specification Round bar Diameter Length - Forged round bar£º¦Õ50~450 2000~6000 - Rolled round bar£º ¦Õ10~80 2000~6000 - Flat bar Thickness(mm) Width(mm) Length(mm) Forged plate£º20~300 50~710 2000~6000 Rolled plate£º 10~65 155~610 2000~6000 According to customer's requirements.