ASSAB 618 HH is a prehardened mould steel with a higher hardness, 340 – 380 HB, than ASSAB 618 and ASSAB 718 Supreme. The higher hardness gives an increased resistance to wear and indentations, which means enhanced mould life.
Injection moulds for thermoplastics
Extrusion dies for thermoplastics
Blow moulds
Forming tools, press-brake dies (possibly flame hardened or nitrided)