Micro-Melt® HS30

Micro-Melt® HS30 alloy is an 8% cobalt, high hardenability tungsten-molybdenum alloyed high speed steel exhibiting excellent hot hardness combined with good wear resistance and toughness. It is recommended for cutting tools for difficult-to-machine materials and high cutting speeds. Many of the benefits realized in the use of Micro-Melt® powder metals, including ease of grinding, improved response to heat treatment, greater wear resistance, and increased toughness of the finished tool, are a direct result of the refined microstructure featuring smaller, more uniformly distributed carbide particles and a finer grain size, as well as the lack of segregation in the powder metallurgy product. In addition, Carpenter Technology's unique hot rolling and rotary forging capabilities impart minimal distortion characteristics to these alloys.

Type Analysis

  • Carbon (Nominal) 1.27
  • Phosphorus (Maximum) 0.03
  • Silicon (Maximum) 0.55
  • Tungsten (Nominal) 6.25
  • Manganese (Maximum) 0.3
  • Sulfur (Maximum) 0.03
  • Chromium (Nominal) 4.2
  • Cobalt (Nominal) 8.5
  • Molybdenum (Nominal) 5
  • Iron (Nominal) Balance
  • Vanadium (Nominal) 3.1


Milling cutters End mills Cutting tool inserts Gear cutting tools Lathe tools Punches and dies Form tools Broaches Reamers Cut-off tools Drills Taps

Applicable Specifications




HIP'd Shapes





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