D21

D21 Tool Steel

Cold Work Tool Steel D21

D21 is a cold work tool steel developed for blanking, forming, cutting, and other wear-intensive tooling applications. It offers high hardness and abrasion resistance to protect working edges through continuous production cycles. The grade also provides good dimensional stability after heat treatment for tools that must hold close tolerances. Its strong compressive strength helps resist deformation under repeated heavy loads. D21 is widely selected for punches, dies, shear blades, and precision tooling where long service life matters. Its balanced toughness and wear resistance support dependable performance in regular production use. Built for dependable shop-floor performance, it supports consistent output and reduced maintenance.

Key Features

  • High hardness and abrasion resistance for longer tool life
  • Good dimensional stability after heat treatment
  • Strong compressive strength for heavy-duty tooling
  • Reliable edge retention in cutting and forming work
  • Suitable for precision machining and grinding operations

Applications

  • Blanking dies and cold forming dies
  • Punches, piercers, and press tools
  • Shear blades, slitters, and trimming tools
  • 2001.
  • Gauges, wear plates, and guide components
  • General-purpose cold work tooling