6) The allowable defects on the cast ball surface should conform to the following tableallowable defects on surface are no more thansurplus (less) bead at sprue (mm) Sand width near the sprue (mm) Partial residual flash(mm) hole (not shrinkage cavity) Depth (mm) individual area (mm2) total area (mm2)1.5 3.0 1.0 1.0 6 307) For other requirements, please refer to the technical specifications of Chapter V Requirements on Supply.