... hardness 4, less deformation 5, h11 tool steel Sichuan Liaofu Special Steel Trading Co., Ltd.h11 tool steeAISI H11 ... X38CrMoV51 good toughness die and tool steel Dimensions:Forging flat steel: (100mm~550mm)×(400mm~1000mm)Rolling flat steel: (8mm~50mm)×(70mm~ ... air-cooled hardened steel2, good toughness, thremal hardness, and thermal fatigue resistance3, little deformation under heat treatment4, little ...