1.Hardness of annealing: Hbs=137~269 2.Chemical composition C p cr si mn ni 0.42~0.48 0.03(max) 0.20(max) 0.15~0.35 0.6~0.9 0.20(max) 3.Regular specifications : Round bar Diameter(mm) length(mm) 10~600 2000~5700 Flat steel Thickness(mm) width(mm) length(mm) 8~700 205~1000 2000~6000 4. Process of production Eaf+lf+vd+esr+forged or hot rolled+heat treatment(optional) 5. Condition of surface Black Rough machined Turned/milled 6. Inspection Ultrasonic test , according to sep1921 d/d or as your requirements 7. Technical data : According to the customer's requirement of chemical composition, mechanicalproperties. Material details will be as per agreed technical specifications 8.Applications Used for making mould bottoms, plastic mould , normal mechinery parts and so on