What are the applications of Rockwell hardness testers in castings?

Rockwell hardness testers are commonly used for the hardness testing of cast iron. For workpieces with fine grains that do not have sufficient surface area for Brinell hardness testing, Rockwell hardness testing can also be performed. For pearlitic malleable cast iron, chilled cast iron, and steel castings, the HRB or HRC scales can be adopted. If the material is non-homogeneous, several readings should be measured and their average value should be taken.

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