The following variances to the total lead (Pb) requirementsfor general materials are permitted for accessible component parts of electronic devices up to a maximum required level of 210 ppm total Pb:5.6.1 Lead used as an alloying element in steel.5.6.2 Lead used in the manufacture of aluminium.5.6.3 Lead used in copper-based alloys (e.g. brass).5.6.4 Lead used in lead-bronze bearing shells and bushings.5.6.5 Lead used in compliant pin connector systems.