NOTE 2—These metric test methods are essentially the same as those in
Test Methods E 8, and are compatible in technical content except that gage
lengths are required to be 5D for most round specimens rather than 4D as
specified in Test Methods E 8. Test specimens made from powder
metallurgy (P/M) materials are exempt from this requirement by industrywide
agreement to keep the pressing of the material to a specific projected
area and density.