Considering that all the developments in the metallurgy of steel such as the development of low alloy, tool, high speed and stainless steels and the industrial processes required to mass manufacture carbon steel were all British developments without which the modern world would not have happened and that on the whole most of the modern super steels used in contemporary knife making are either European or Japanese in origin (from small specialist foundries) I really don't understand the term 'mongrel steel'. Could you explain as I have never heard this term before.