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There are currently 4 Friodur Kitchen and Meat Shop Knives residing at the Boars Nest including one that I purchased about 1977. For last Christmas I purchased a used Friodur Knife set from Flea Bay...

From another source/please note the date and who patented the process;

Zwilling J.A. Henckels: Friodur Ice-Hardened Steel

I hope this helps :shrug:

I do hope that Mike Blue will stumble upon this discussion as he has forgotten more than many will ever know about steel and it's properties.

If he does; he might Slap this Old Redneck Country Boy...