Abstract: Two types of 1.2367 steel 220 mm×810 mm and Ø220mm were developed. The hardness of the test steels under different quenching and tempering processes and the impact toughness and tensile properties in the range of 46-48 HRC hardness were studied. The results show that tempering secondary hardening peak temperature was 510℃ and the peak hardness was 56.6 HRC, the isotropic in the center of test steels reach to 90% after quenching at 1 050℃ and tempering at 620℃, the unnotched impact energy in the transversal direct and center of the 220 mm×810 mm size test steel reach to 371 J. 1.2367 steel has the application of higher temperature range and has higher strength and impact toughness compared with H13 steel.