Chemical Composition
Base Element
C (Carbon)
0.72 to 0.8
%    
Co (Cobalt)
9 to 10
%    
Cr (Chromium)
3.8 to 4.5
%    
Fe (Iron)
62.8 to 67.1
%    (estimate)
Mn (Manganese)
0.4
%  (maximum)  
Mo (Molybdenum)
0.5 to 0.8
%    
P (Phosphorus)
0.03
%  (maximum)  
S (Sulfur)
0.03
%  (maximum)  
Si (Silicon)
0.45
%  (maximum)  
V (Vanadium)
1.4 to 1.7
%    
W (Tungsten)
17.5 to 18.5
%    
 



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