17-4PH martensitic stainless steel sheets combine high strength, hardness (up to 572°F / 300°C), and corrosion resistance. 17-4PH should not be used at temperatures above 572°F (300°C) or at very low temperatures.
35CrMo hot rolled round bars and forged round bars is belongs to alloy structural steel under the standard of GB/T3077-1999, More information about 35CrMo hot rolled or forged round bar,please see the following.