... hardened steel 2, good toughness 3, little deformation 4, high thermal hardness 5, din1.2343 tool steel bar Sichuan Liaofu Special Steel ... GB 4Cr5MoSiV Dimensions:Forging round steel: Φ80mm~900mmRolling round steel: Φ10mm~155mm Sichuan Liaofu Special Steel Trading Co., Ltd.Hot ... Dalian 7,MOQ:1 MT Characters:1, air-cooled hardened steel2, good toughness, thremal hardness, and thermal fatigue resistance3 ...