Performance Characteristics: 　　Cold work mould steel, quench-hardening ability、the hardness of tempering、wear resistance and strength are better than Cr12. Applications: All kinds of cold blunt mould and tools, such as punching concave die, trimming, roll mould, steel plates、deep drawing die, circular saws, standard tools and gauge, thread rolling mould and so on. Chemical Composition (%): Mo C Si Mn P S Cr Cu V 0.40-0.60 1.45-1.70 0.25-0.40 0.20-0.40 �0.030 �0.030 11.00-12.50 �0.30 0.15-0.30 Heat Treatment Standard: 　　　1)Quenching, 950 ~ 1000 centigrade cold oil�2) Quenching 1020 �, 200 � tempering 2 hours. Mechanical properties: Hardness: annealing, 255 ~ 207 HB, creasing diameter 3.8 ~ 4.2 mm; Quenching,more than or equal to 58 HRC Delivery status: Annealed