In {HEAD ~ an Fe base alloy}, Ni is contained by {TAIL ~ 28 to 34%} by weight and Co by 2 to 7% by weight with an average grain size of 30 μm or less 
In { HEAD ~ an Fe base alloy } , Ni is contained by { TAIL ~ 28 to 34 % } by weight and Co by 2 to 7 % by weight with an average grain size of 30 μm or less
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL 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