UNS #T31506

O6 is an oil-hardening tool steel designed to have free graphite in the microstructure creating excellent machinability for cold work applications. Available in decarb-free flats with a microinch finish of under 150 on all four sides, eliminating the need for bar bark removal.

Type Analysis

  • Carbon (Nominal) 1.45
  • Silicon (Maximum) 1
  • Manganese (Maximum) 0.85
  • Molybdenum (Nominal) 0.25
  • Iron (Nominal) Balance


Blanking dies Drawing dies Forming dies Punches Hobs for nonferrous metals Gauges Cams Bushings Mandrels Piercing dies Pneumatic hammers Spinning tools Stamps Taps Edging and metal forming rolls Jewelers' anvils Rotary slitting cutters Marking tools Wear plates

Applicable Specifications

  • ASTM A681
  • QQ-T-570




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