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