Material Choose Of Paper Cutting Knife For Wohlenberg Cutter

What’s the normal material of Paper cutting knife for Wohlenberg cutter? A. Standard steel- CrWMn, B. HSS, C. TCT. TCT is better than HSS, and HSS better than CrWMn. Meanwhile, I have to mention that our HSS material is W18Cr4V, not W6. I am sure that you know W18 is better than W6.