Purpose: This specification covers steel cleanliness requirements in SI (metric) units for aircraft-quality ferro-magnetic steels@ other than hardenable corrosion-resistant steels@ by magnetic particle inspection methods. AMS 2301 is the inch/pound version of this MAM. 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.