NF EN 1043-1,Destructive test on welds in metallic materials - Hardness testing - Part 1: Hardness test on arc welded joints) |& h; j* f7 ~& R: j. t, w
NF A 05-152,Iron and steel products - Macroscopic examination by strong mineral acid attack / F4 I8 Y. W- O$ E# NNF A 05-150,Steel products - Micrographic examination techniques 0 Y, [, C; L1 ^2 ?8 H4 \NF A 05-165,Steel products - Manual point counting method for statistically estimating the volume fraction of a constituent with a point grid0 V4 @" X2 G1 ` t9 U! U- ~