Chemical Composition
0.0008 to 0.005
%    
0.24 to 0.3
%    
0.3 to 0.6
%    
0.4
%  (maximum)  
96.8 to 98.4
%    (estimate)
1.1 to 1.4
%    
0.025
%  (maximum)  
0.035
%  (maximum)  
0.4
%  (maximum)  
1) Cast analysis.
2) The steel shall be supplied in the killed condition.
3) In the case of grades with specified hardenability requirements, except for P and S, insignificant deviations from the limits for cast analysis are permissible; these deviations shall, however, not exceed in the case of C ±0.01 %, and in all other cases, the values according to ISO 683-1 – Table 4.
4) 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 %.
5) 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≥ 1.67e72.09e7 to 2.61e7≥ 14
Diameter or thickness, > 16 to ≤ 40 or > 8 to ≤ 20 mm respectively≥ 1.57e71.88e7 to 2.4e7≥ 14
Diameter or thickness, > 40 to ≤ 63 or > 20 to ≤ 35 mm respectively≥ 1.46e71.67e7 to 2.09e7≥ 15

1.46e7
lbf/ft^2  (minimum)  
1.67e7 to 2.09e7
lbf/ft^2    
15
% strain  (minimum)  
Quenched and tempered (+QT)
Mechanical properties for ruling sections with a diameter > 40 mm to ≤ 63 mm, or for flat products with a thickness > 20 mm to ≤ 35 mm.
 
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