Of KD11 mold steel 
 The KD11 mold steel high frequency KOSHUHA research and production of the latest model of generic cold work die steel, excellent workability, extended tool life and improve processing efficiency, the cutting surface in more detail, even after heat treatment machining, and SKD11 heat treatment of conditions the same be extended tool life and improve processing efficiency, more detailed cutting surface, cutting even after heat treatment, mechanical properties superior to SKD11. better than the SKD11 the fatigue strength, superior to the SKD11 the toughness and wear resistance. give full play to SKD11 the basic properties of machinability incredible advances. KD11S is commonly used in the new cold work tool steel with excellent machinability, and maintained the SKD11 the basic characteristics of the steel patent steel. Cutting performance improved mainly because the control of the carbide morphology, so that it can extend the life of cutting tools and improve the efficiency of machining, milling machine, a cutting length cutting speed than SKD11 a corresponding increase in 50%. When the lathe, the cutting surface roughness improvement. And even after heat treatment, machining, such as after heat treatment the 60HRC under, you can still tapping processing. The number of tool breakage when the tapping SKD11 improved significantly. The heat treatment of steel in the same conditions and SKD11, deformation after heat treatment and SKD11 recommended heat treatment process conditions are as follows: (1) quenching: 500/600 ° C for the first time to warm-up → 800/850 ℃ times preheat → 1020 / 1040 ° C austenitizing heating → oil cooling to 200 ° C air-cooled; air hardening or gas quenching. ② tempering: low-temperature tempering temperature is 170 ~ 200 ℃; high-temperature tempering temperature is 500 ~ 530 ℃. Note that heat treatment after machining to high-temperature tempering. The steel after heat treatment phase for the SKD11 has high fatigue strength and wear resistance. Factory status: HB210-240 material properties: (1) superior processing performance. Excellent machinability after heat treatment. Excellent toughness. (4) excellent wear resistance