Chemical Composition
Base Element
Al (Aluminum)
0.1
%    
B (Boron)
0.003
%    
C (Carbon)
0.03
%  (maximum)  
Co (Cobalt)
8
%    
Fe (Iron)
68.7 to 68.7
%    (estimate)
Mo (Molybdenum)
4.8
%    
Ni (Nickel)
18
%    
Ti (Titanium)
0.4
%    
Balance
Other elements
Zr
Composition Note
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
Yield Strength
1690
MPa    
Ultimate Tensile Strength
1750
MPa    
Elongation
10.5
% strain    
 
Other Information
Material Class
Country
Description
Heat treated forging: 254,000 TS; 245,000 YS; 10.5 El; 55 RA. For missile components, aerospace and jet engine parts, rocket motor cases. Maraging. High strength and fracture toughness.
Designation
VAR STEEL GR. 250
Specification Type
Specification Status
Source
Available forms
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