O-6 Tool Steel
Chemical Composition
Carbon (C)            1.25/1.55
Manganese (Mn)      .30/1.10
Silicon (Si)                .55/1.50
Tungsten (W)
Molybdenum (Mo)    .20/.30
Chromium (Cr)        .30 max
*Nickel (Ni)             .30 max
*Unless otherwise specified, nickel plus copper equal 0.75% max. for all tool steel types
O-6 is typically bought to meet chemistry requirements rather than physical requirements. For that reason, physical properties are generally not provided unless requested prior to production. Any material can be sent to a third party after production to be tested for physical properties.
Typical Uses
Typical Applications for O-6 Tool Steel include:
  • Blanking Dies
  • Piercing Dies
  • Drawing Dies
  • Pneumatic Hammers
  • Forming Dies
  • Spinning Tools
  • Punches
  • Stamps
  • Gauges
  • Wear Plates
  • Cams
  • Rotary Slitting Cutters

Oil Hardening Cold Work Tool Steel

O-6 Tool steel is noted for it's excellent wearing and galling resistance in metal on metal sliding applications. O-6 is an oil-hardening graphitic cold work tool steel. The tiny graphite carbon particles are distributed evenly throughout the tool steel essentially create a self-lubricating effect which results in outstanding machinability and non-seizing characteristics. The graphite also helps retain oil where lubrication is used. For an oil-hardening steel, 06 holds size well during heat treating.