Can someone shed some light on why in EN ISO 15614-1 hardness survey is not required for stainless steels in group 8?
http://www.gowelding.com/wp/new-standards.pdf
Hardness Survey is not required for :-
Steels in Sub-group 1.1 (yield strength of 275N/mm2 or less)
Stainless Steels in Group 8...