There is a chap who runs the Salvage Yard at Wilminstone Quarry in Tavistock who produces 'bars' of the stuff, about 2" diameter. The ones in the bags I have seen there are broken off into roughly 6" lengths. Sorry, I didn't see the machine, or enquire as to the process...I was there to collect a 20ft length of angle iron at a quarter of the price of the steel suppliers up the road!
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