https://www.bearingroller.com/tools/taperroller-cold-heading-tools/cold-heading-dies.html
Cold work die steel Cr12 or Cr12MoV can be used.
Cr12 die steel is a typical alloy tool steel. It is a widely used cold work die steel with high strength, good hardenability and good wear resistance, but poor impact toughness. It is mainly used as a cold die and punch, cold cutting scissors, drill sleeve, gauge, drawing die, stamping die, crepe plate, drawing die and thread rolling die which are less impact load and require high wear resistance.
Cr12MoV cold work die steel, steel hardenability, quenching and tempering hardness, wear resistance, strength are higher than Cr12. Various cold stamping dies and tools with complex shapes and heavy working conditions, such as punching die, trimming die, piping die, steel plate deep drawing die, circular saw, standard tools and gauges, thread rolling die, etc.