ASSAB Steel - 718H
ASSAB High performance plastic mould steel

Delivered Hardness
pre-hardened to HB330-380

Chemical Content(%):(For reference only)

C Si Mn Cr Ni Mo
0.38 0.3 1.4 2.0 1.0 0.2

Comparable Standard:


  • No hardening risks
  • No hardening costs
  • Time saving
  • Lower tool costs
  • Modifications easily carried out
  • Can be subsequently nitrided to increase surface wear resistance and locally flame hardened to reduce surface damage
  • Good polishing and photo-etching properties
  • Good machinability
  • High purity and good homogeneity
  • Uniform hardness


  • Injection moulds for thermoplastics
  • Extrusion moulds for thermoplastics
  • Blow moulds
  • Forming tools
  • Structural components, shafts


 LKM Steel Rainbow Chart