The HR-150A Rockwell Hardness Tester enhances precision and stability through precision processing of its core components. The appearance has been refined to better align with modern aesthetic preferences. It utilizes mechanical manual testing, requiring no power, and offers wide applicability, ease of operation, cost-effectiveness, and practicality.

This guide details the complete metallographic sample preparation workflow for different cast irons covering cutting, mounting, grinding and polishing. It provides standardized process parameters and matched consumables for white cast iron and graphite-containing cast iron to solve common preparation defects like graphite deformation and surface oxidation.