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DIN 1.2343

Tough tool steel

DIN 1.2343 is an alloyed chromium-molybdenum tool steel with very good toughness, high impact resistance and good resistance to thermal stress. Due to its balanced combination of properties, it is used for hot forming tools, dies, pressure molds and other applications with high thermal and mechanical stress.


Alternative designation: X38CrMoV5.1, ČSN 19552
Type: Alloy, chrome-molybdenum, tool steel

Heat treatment:

  • Preheating: 600–850 °C (multi-stage)

  • Quenching: 1000–1030 °C (oil, air or vacuum)

  • Tempering: 550–650 °C (usually multiple times) depending on the required hardness

  • Possible nitriding or PVD coating to increase surface hardness

Round bars, rolled, peeled, forged, annealed

10

15

20

25

30

35

41

46

51

56

61

66

71

76

81

86

91

102

111

122

132

142

152

162

172

182

192

202

212

222

232

242

252

262

272

282

303






Flat bars, rolled, annealed


500











10

X











15

X











20

X











25

X











30

X











40

X











50

X











60

X











70

X











80

X












Blocks forged, roughened, annealed


410

510

610

710

810







410

X

X

X

X

X


































Features:

  • High toughness even at elevated temperatures

  • Good hardenability and thermal conductivity

  • Resistant to thermal shock

  • Good machinability in the annealed condition

  • Suitable for polishing and nitriding

  • Hardness after hardening up to approx. 50–52 HRC

Use:

  • Dies for hot forming (forging, extrusion)

  • Die casting molds (especially aluminum and zinc)

  • Plastic injection molds

  • Shearing tools for hot-formed parts

  • Carriers and preparations exposed to high temperatures

  • Tools requiring high toughness and durability under thermal stress

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