The performance of a steel blade is primarily determined by its chemical composition and heat treatment. For high-durability requirements, prioritize High-Carbon Steel (e.g., SK5, 1095) for edge retention or Stainless Steel (e.g., 440C, 3Cr13) for corrosion resistance. For industrial cutting, High-Speed Steel (HSS) or Tungsten Carbide Tipped (TCT) blades are essential for heat resistance and longevity. Always verify the Rockwell Hardness (HRC) scale; for most industrial applications, a range of 58-62 HRC provides the optimal balance between sharpness and toughness.