H13 tool steel is mainly supplied as round bar and steel plate. DIN 1.2344 & ASTM H13 are equivalent material. This article we introduce H13 hardness.

H13 is a typical chromium-molybdenum tool steel widely used in hot work and cold work tooling applications. H13 usually are delivered in annealing condition. H13 Harness after annealing is max 235 HB.

Common H13 heat treatment and hardness regulations as follow

  • H13 Annealing hardness: 235 HB
  • H13 Cold drawn hardness: 262 HB
  • Preheat temperature: 788°C
  • Quenching temperature | Salt bath: 996°C
  • Quenching temperature | Controlled atmosphere furnace: 1010°C
  • Austenitiz-ing time:  5 – 15 minutes
  • Quench Medium: Air
  • Tempering temperature: 552°C
  • H13 Tempering hardness: Min 52 HRC