Purpose:This specification covers steel cleanliness requirements in inch/pound units for aircraft-quality@ ferromagnetic@ hardenable@ corrosion-resistant steels as determined by magnetic particle inspection methods. This specification contains sampling@ specimen preparation@ and inspection procedures and cleanliness rating criteria.MAM 2303 is the metric version of this AMS.Application:This procedure has been used typically for the cleanliness evaluation of blooms@ billets@ tube rounds@ stock for forging or flash welded rings@ slabs@ bars@ sheet@ strip@ plate@ tubing@ and extrusions used in fabricating parts subject to magnetic particle inspection@ but may be used for qualification of a heat@ melt@ or lot of steel.