Use diamond cone or quenched steel ball indenter to press the indenter into the material surface under the action of test pressure F. After holding for a specified time, remove the main test force and maintain the initial test force. Calculate the hardness value with the residual indentation depth increment. During actual measurement, the Rockwell hardness value can be directly read out through the dial of the testing machine.

UNS N10276 is a tungsten-containing nickel-chromium-molybdenum-alloy with very low silicon and carbon content. The alloy has excellent corrosion resistance to most corrosive media in both oxidizing and reducing states. Excellent resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. The alloy is suitable for use in various chemical process industries containing oxidizing and reducing media. Hastelloy C-276 is one of only a few materials that are resistant to moist chlorine, hypochlorite and chlorine dioxide solutions, and the alloy has significant resistance to high concentrations of chloride solutions (e.g. ferric chloride and copper chloride).

An important property of alloy 601 is its resistance to oxidation at temperatures up to 1180℃. It can be used even under severe conditions. Even under severe conditions, such as heating and cooling cycles, 601 can generate a dense oxide film and obtain high resistance to flaking.