Originally Posted by
Pauly
The explanation I was given about Viking pattern welding is that Scandinavian iron ore is the highest quality in the world. It's why Hitler invaded Norway in 1940 and why many high end Japanese knife makers use Sandvik steel for their best knives.
On the 64 folds, most PWs I know follow the 2, 4, 8, 16, 32, 64, 128 ... progression, so if there was a metallurgical advantage to using a pattern weld my supposition is that you would need a fairly high fold number to get that advantage in a thin hollow ground blade. Most true pattern welded kitchen knives are 16 or 32 fold.