Chemical Composition
0.22 to 0.29
%    
0.4
%  (maximum)  
0.3
%  (maximum)  
97.3 to 99.3
%    (estimate)
0.4 to 0.7
%    
0.1
%  (maximum)  
0.4
%  (maximum)  
0.045
%  (maximum)  
0.045
%  (maximum)  
0.1 to 0.4
%    
Cr + Mo + Ni ≤ 0.63 %
1) Cast analysis.
2) The steel shall be supplied in the killed condition.
3) Steels with improved machinability either by higher S levels up to about 0.10 % S (including controlled sulphide morphology) or Pb additions may be available on request. In the first case, the upper limit for the Mn content may be increased by 0.15 %.
4) Fe is listed as a Base element for this material, but its % value is not listed in the specification. The value shown is a calculated one.
 
Mechanical Properties
DimensionsYield Strength (lbf/ft^2)Ultimate Tensile Strength (lbf/ft^2)Elongation (% strain)
Diameter or thickness, ≤ 16 or ≤ 8 mm respectively≥ 7.73e61.15e7 to 1.46e7≥ 19
Diameter or thickness, > 16 to ≤ 40 or > 8 to ≤ 20 mm respectively≥ 6.68e61.04e7 to 1.36e7≥ 21

6.68e6
lbf/ft^2  (minimum)  
1.04e7 to 1.36e7
lbf/ft^2    
21
% strain  (minimum)  
Quenched and tempered (+QT)
Mechanical properties for ruling sections with a diameter > 16 mm to ≤ 40 mm, or for flat products with a thickness > 8 mm to ≤ 20 mm.
 
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