This specification has been declared "CANCELLED" by the Aerospace Materials Division, SAE, as of June 2007, and has been superseded by AMS 2301. The requirements of the latest issue of AMS 2301 shall be fulfilled whenever reference is made to the cancelled MAM 2301. By this action, this document will remain listed in the Numerical Section of the Index of Aerospace Material Specifications noting that it is superseded by AMS 2301.This specification covers steel cleanliness requirements in SI (metric) units for aircraft-quality ferro-megnetic steels, other than hardenable corrosion-resistant steels, by magnetic particle inspection methods.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.