design of heading die (tungesten carbide die) for steel ball & fastener industry
We will refer you to some sites that have an extensive range of products which should cover most of your needs. Like all manufacturers they will customize a solution for you if you have a need.
The first site is Basic Carbide
The second site is Federal Carbide
and is a full service carbide house.
Sandvik is a leader in cutting tools and they explain what the fineness of grades mean. See Sandvik
Hope this helps.