To reduce the grain size the present invention includes an additive constituted by {HEAD ~ a rare earth} or {TAIL ~ a mixture} of rare earths, e.g. misch metal at between 0.001% and 1% by weight, and preferably at 0.2% 
To reduce the grain size the present invention includes an additive constituted by { HEAD ~ a rare earth } or { TAIL ~ a mixture } of rare earths , e.g. misch metal at between 0.001 % and 1 % by weight , and preferably at 0.2 %
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH