1. Hardening in air, featuring a fine combination of hot strength, cracking Resistance and impact toughness in work 600 C; 2. ESR products have good macrostructure and EFER steel has all higher directivity; 3. Application: Extrusion dies and casting die for aluminum, magnesium and copper alloy. Diameter: 12-360mm Thickness: 20-300mm Width: 100-600mm