scope:

This guide describes procedures for preparing samples of ferrous powder metallurgy (PM) materials for metallographic evaluation using cross-sectional analysis. Procedures for the preparation of copper-based and aluminum PM materials are covered in separate standards.

This guide does not cover procedures for the preparation of samples of cemented carbides.

Because most PM materials are porous, care needs to be taken to ensure that the true level of porosity is revealed and that smeared metal does not remain in the pores after grinding and polishing. Powder forged and metal injection molded samples that do not contain high levels of porosity may be prepared in a manner similar to that used for wrought materials.

The methods described in this guide are proven practices for the metallographic preparation of porous PM materials. It is recognized that other procedures or materials used in the preparation of a sample may be equally effective and can be used based on material availability and preferences of individual laboratories.

This standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the potential safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.