... alloyed hot work tool steel with high temperature impact toughness and thermal fatigue strength,resistant to repeated shocks,high resistant ... °CHardness 45-48 4. Application Forging dies of all types,hammer forging dies up to largest dimension,tools for tube ... forming tools, plastic moulds, hot gripper and heading dies. 5. As material, the tolerance is +-0~2mm 6. Delivery condition: Black, peeled, ...