M4

UNS #T11304

M4 is a molybdenum-tungsten high-speed tool steel possessing high carbon and vanadium content, providing a very high degree of wear resistance coupled with high strength.

Type Analysis

  • Carbon (Nominal) 1.3
  • Silicon (Maximum) 0.3
  • Tungsten (Nominal) 5.5
  • Manganese (Maximum) 0.3
  • Chromium (Nominal) 4.5
  • Molybdenum (Nominal) 4.5
  • Iron (Nominal) Balance
  • Vanadium (Nominal) 4

Applications

drills, taps, reamers, broaches, milling cutters, form cutters, thread chasers, and hobs.

Applicable Specifications

  • ASTM A600
  • QQ-T-59

Bar

Rounds

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