NF EN 1043-1,Destructive test on welds in metallic materials - Hardness testing - Part 1: Hardness test on arc welded joints
NF A 05-152,Iron and steel products - Macroscopic examination by strong mineral acid attack
NF A 05-150,Steel products - Micrographic examination techniques
NF A 05-165,Steel products - Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid