Micro-Melt® M4

UNS #T11304

Micro-Melt® M4 alloy is a molybdenum-tungsten powder high speed tool steel containing high carbon and vanadium. This grade possesses very high wear resistance coupled with high strength. Considered for many types of tooling applications where good toughness, improved grindability and wear resistance are important. 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) 1.45
  • Silicon (Maximum) 0.4
  • Tungsten (Nominal) 5.75
  • Manganese (Maximum) 0.4
  • Sulfur (Maximum) 0.13
  • Chromium (Nominal) 4.5
  • Molybdenum (Nominal) 4.5
  • Iron (Nominal) Balance
  • Vanadium (Nominal) 4

Applicable Specifications






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