ASSAB 718 HH is prehardened mould steel with very good polishing and photo etching properties. It is suitable for a wide range of injection moulds, blow moulds and extrusion dies for plastic. ASSAB 718 HH is supplied at 340-380 HB. ASSAB 718 HH is suitable for applications that require mould steel of high ductility and high wear resistance.


  • Good polishing properties
  • Good photo-etching properties
  • Good machinability
  • High purity and good homogeneity
  • Uniform hardness
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Chemical composition
Carbon 0.37 Silicon 0.30 Manganese 1.40
Chromium 2.00 Nickle 1.00 Molybdenum 0.20
Sulphur <0.01

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