KD11S
 KD11S is the latest research and production of high-frequency KOSHUHA type of generic cold die steel, excellent workability, extended tool life and improve processing efficiency, cutting the surface in more detail, even after heat treatment machining, heat treatment and SKD11 the same conditions, extended tool life and improve processing efficiency, more detailed surface machining, cutting even after heat treatment, mechanical properties superior to SKD11, SKD11 than the fatigue strength, toughness and wear resistance than SKD11 give full play to the basic SKD11 performance, was cutting a striking improvement.
 KD11S is a good cutting properties of the new cold work tool steel used to maintain the basic properties of steel SKD11 patent steel. This increase was mainly due to cutting control of the carbide morphology, which can prolong the life of cutting tools and machines to improve processing efficiency, such as milling, cutting speed under certain cutting length SKD11 than 50% can be increased accordingly. When the lathe, the cutting surface roughness improvement. And after heat treatment can be cutting, such as after heat treatment to get 60HRC, can still be tapping process. The tapping tool breakage when compared to the number of SKD11 significantly improved.
 The heat treatment of steel SKD11 the same conditions, the deformation after heat treatment also SKD11 the same, the recommended heat treatment conditions: ① quenching: 500/600 ℃ for the first time a second warm-up → 800/850 ℃ preheat → 1020 / → austenitizing heating 1040 ℃ to 200 ℃ oil made ​​air-cooled cold; can also be air-cooled or air quench hardened. ② Tempering: tempering temperature of 170 ~ 200 ℃; high-temperature tempering temperature of 500 ~ 530 ℃. Note that the heat treatment after machining parts for high-temperature tempering purposes.
 After the heat treatment of steel with a high relative SKD11 fatigue strength and wear resistance.
 Factory state: HB210-240
 Material properties:
 1 superior processing performance.
 (2) after heat treatment was superior cutting.
 3 remarkable resilience.
 4 excellent wear resistance.