1.1 This practice covers the sampling, for the determination of chemical composition (Note 1), of nonferrous metals and alloys that have been reduced to their final form by mechanical working; that is, by such means as rolling, drawing, and extruding.1.1.1 Refer to Practice E255 for copper and copper alloys. Note 1--The selection of correct portions of material and the preparation of a representative sample from such portions are necessary prerequisites to every analysis, the an