Chemical Composition
0.15 to 0.3
%    
0.003
%    
0.03
%  (maximum)  
77.5 to 79
%    (estimate)
0.5
%    
19 to 20
%    
1.3 to 1.6
%    
0.02
%    
Fe is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one.
 
Mechanical Properties
1.68e9 to 1.79e9
Pa    
1.74e9 to 1.83e9
Pa    
10 to 13
% strain    
49 to 53
   
 
Other Information
Heat treated: 253,000-265,500 TS; 244,000-260,000 YS; 10-13 El; 52-59 RA; 49-53 HRC; For rocket motor cases, airframes, airborne equipment, large machinery parts, bolts, cryogenic and high temperature equipment. Maraging steel, shock resistant.
ALMAR 20
 
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