... 3, little deformation 4, high thermal hardness 5, din1.2343 tool steel bar Sichuan Liaofu Special Steel Trading Co., Ltd.1 ... ~900mmRolling round steel: Φ10mm~155mmSichuan Liaofu Special Steel Trading Co., Ltd.Hot work die steel1, Grade: AISI H11/JIS SKD6/ ... , thremal hardness, and thermal fatigue resistance3, little deformation under heat treatment4, little tendency of oxide skin while air-quenching5, ...