H11

Overview

H11 is an air-hardening hot-work tool steel known for its combination of toughness, wear resistance, thermal-fatigue resistance and resistance to softening at elevated temperatures. It is widely used for demanding hot-work tooling.

Chemical Composition

C

Si

Mn

Cr

Mo

V

P/S

0.33 – 0.43

0.80 – 1.20

0.25 – 0.50

4.75 – 5.50

1.10 – 1.60

0.30 – 0.60

<0.03 each

Heat Treatment

  • Annealing: ~800-850°C
  • Stress relieving: ~650–700°C
  • Hardening: approximately 1000–1020°C
  • Quenching: air/gas or suitable controlled cooling
  • Tempering: approximately 550–600°C, generally double tempered

Mechanical Properties

  • Typical working hardness: 48–52 HRC
  • Quenched hardness: approximately 52–56 HRC
  • High toughness
  • Good thermal-fatigue resistance
  • Good resistance to hot wear

Equivalent Grades

  • AISI: H11
  • DIN: 1.2343
  • DIN EN: X38CrMoV5-1
  • JIS: SKD6

Available Forms

  • Round bars
  • Flat bars
  • Plates

Applications

  • Hot forging dies
  • Die-casting dies and components
  • Hot extrusion dies
  • Hot shear blades
  • Punches and forming tools
  • Inserts and cores
  • Plastic mould components exposed to elevated temperatures
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