1. Material: 4Cr5MoSiV 2. Application: Applicable for manufacturing aluminum castings, tools and mandrel for hot extrusion and perforation die, press die and plastic model. 3. Delivery condition: Heat treatment blank or rough machining 4. Standards: ISO9001, GB/T1299-2000 alloy tool steel technology condition, we can supply large forging, casting, roller(including hot roller, cold roller) 5. Major products specifications: Cold work die forging model: (400-3000mm)× (200-550mm)× (100-350mm) Hot work and plastic model: (400-3000mm)× (200-1000mm)× (100-350mm Hot work die steel forging: φ 80-650mm Cold work die steel forging: φ 80-450mm Hot work and plastic dish: (φ 500-1600)× (120-500)