Chemical Composition
Base Element
C (Carbon)
0.73 to 0.83
%    
Cr (Chromium)
3.5 to 4.5
%    
Fe (Iron)
73.9 to 77.8
%    (estimate)
Mn (Manganese)
0.4
%  (maximum)  
P (Phosphorus)
0.03
%  (maximum)  
S (Sulfur)
0.03
%  (maximum)  
Si (Silicon)
0.45
%  (maximum)  
V (Vanadium)
0.8 to 1.2
%    
W (Tungsten)
17.2 to 18.7
%    
 



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