Chemical Composition
Base Element
Al (Aluminum)
0.1
%    
B (Boron)
0.003
%    
C (Carbon)
0.03
%  (maximum)  
Co (Cobalt)
9
%    
Fe (Iron)
66.8 to 66.9
%    (estimate)
Mo (Molybdenum)
4.8
%    
Ni (Nickel)
18.5
%    
Ti (Titanium)
0.7
%    
Zr (Zirconium)
0.02
%    
Balance
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
758
MPa    
Ultimate Tensile Strength
1070
MPa    
Elongation
15
% strain    
Rockwell Hardness C scale
30
   
 
Other Information
Material Class
Country
Description
Annealed: 155,000 TS; 110,000 YS; 15 El; 70 RA; C 30 Rock. Maraged: 290,000 TS; 280,000 YS; 10 El; 55 RA; C 54 Rock. For missile components, rocket motor cases, engine parts, pressure vessels. High strength and fracture toughness. Maraging.
Designation
VAR STEEL GR. 280
Specification Type
Specification Status
Source
Available forms
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