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 sulfide morphology) or Pb additions may be supplied 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.