Chemical Composition
Base Element
C (Carbon)
0.25 to 0.35
%    
Fe (Iron)
97.9 to 98.2
%    (estimate)
Mn (Manganese)
1 to 1.25
%    
Mo (Molybdenum)
0.2 to 0.25
%    
Si (Silicon)
0.3
%    
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
448 to 1260
MPa    
Ultimate Tensile Strength
621 to 1450
MPa    
Elongation
7 to 25
% strain    
Brinell Hardness
196 to 480
   
 
Other Information
Material Class
Country
USA
Description
Heat treated: 90,000-210,000 TS; 65,000-183,000 YS; 7-25 El; 25-55 RA; 196-480 HB; For power shovels, tractor tread steel, mine car wheels; resists shock and wear; IZ-3-56.
Designation
BF-MM
Specification Type
Specification Status
Source
Available forms
Similar Alloys
 
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