Chemical Composition
0.0008 to 0.005
%    
0.27 to 0.33
%    
97.8 to 98.6
%    (estimate)
1.15 to 1.45
%    
0.025
%  (maximum)  
0.035
%  (maximum)  
0.4
%  (maximum)  
1) Cast analysis
2) The steel shall be supplied in the killed condition.
3) Where requirements are made on hardenability of special steels, slight deviations from the limits for the cast analysis are permissible, except for the elements C, P and S; the deviations shall not exceed the specifications of BS EN 10083-3 – Table 4.
4) Steels with improved machinability as a result of the addition of higher S contents of up to around 0.10 % S (including resulphurized steels with controlled inclusion content (e.g. Ca-treatment)) may be supplied upon request. In this 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 (MPa)Ultimate Tensile Strength (MPa)Elongation (% strain)
Diameter or thickness, ≤ 16 or ≤ 8 mm respectively≥ 800950 to 1150≥ 13
Diameter or thickness, > 16 to ≤ 40 or > 8 to ≤ 20 mm respectively≥ 650800 to 950≥ 13

650
MPa  (minimum)  
800 to 950
MPa    
13
% 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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