Performance Characteristics: 1、High heat resistance;2. Excellent toughness and scalability;3.Good hardenability. Applications: Used for aluminium alloy die casting , tools and mandrel, forging mould of die forging hammer,press forging die, high-speed forging die and plastic molding,also structure parts of the plane and the rockets. Chemical Composition (%): C Si Mn Ni Cr Cu S P 0.33~0.43 0.80~1.2 0.20~0.50 �0.25 4.75~5.50 �0.30 �0.030 �0.030 Hardness of annealed: HBS�235 The Process� EAF+LF+VD+ESR+Forged or hot rolled+Heat Treatment(optional)  Inspecting� ultrasonic test, according to SEP1921 D/d or as your requirements  Delivery status: Annealed