KD11S die steel 
 KD11S frequency KOSHUHA research tool steel is produced using the latest cold-working die steel pan, excellent workability, extended tool life and improve processing efficiency, cutting surface in more detail, even after cutting heat, and heat treatment conditions SKD11 the same, extended tool life and improve processing efficiency, more detailed cutting surface, cutting even after heat treatment, mechanical properties superior to SKD11, SKD11 than the fatigue strength, toughness and wear resistance than SKD11. SKD11 full basic performance, has been cutting a striking improvement. KD11S is a good machinability of the new cold work tool steel used to maintain the basic properties of steel SKD11 patented steel. This increase was mainly due to cutting controlled 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 can be increased accordingly SKD11 than 50%. When the lathe, the cutting surface roughness improvement. And even after the heat treatment for cutting, such as heat treatment to be 60HRC, can still be tapping process. When the tapping tool breakage relative to the number of SKD11 have improved significantly. The heat treatment of steel SKD11 same conditions, the deformation after heat treatment also SKD11 the same, the recommended heat treatment conditions: ① quenching: 500/600 ℃ for the first time the second warm-up → 800/850 ℃ preheat → 1020 / austenitizing heating 1040 ℃ → 200 ℃ oil-cooling to make air-cooled; can also be air-cooled or air quench hardened. ② Tempering: tempering temperature of 170 ~ 200 ℃; 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 excellent cutting. 3. Remarkable resilience. 4 excellent abrasion resistance