Chemical Composition
Base Element
C (Carbon)
0.75 to 0.85
%    
Co (Cobalt)
4.8 to 5.3
%    
Cr (Chromium)
3.5 to 4.5
%    
Fe (Iron)
67.3 to 72.2
%    (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)
1.1 to 1.6
%    
W (Tungsten)
17.2 to 18.7
%    
 



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