NF EN 1043-1,Destructive test on welds in metallic materials - Hardness testing - Part 1: Hardness test on arc welded joints % H# [: t* e+ r# BNF A 05-152,Iron and steel products - Macroscopic examination by strong mineral acid attack% n+ q w7 _& p8 W1 c5 g/ i# x( L0 y
NF A 05-150,Steel products - Micrographic examination techniques( I0 `9 Y/ o/ g+ l2 J4 @ T8 T
NF A 05-165,Steel products - Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid- H: r6 U" F9 @5 y