Still no brand /spec from UD supplier ?
Kindly use the attachment as reference . Sumitomo brand used as Sumiphol has it in their catalogue.
1. Email/Quotation on our previous complaint about UD cutter quality and suggestion for supplier.
2. For general cutter material specification - Sumitomo Carbide catalogue – Refer Page K50,K51 & K53.
I have used Sumitomo A1 blanks for many years to do formed cutters & tested AF1 ( more expensive ) .