Presentation and governance
UNM and its ecosystem
Standardization for the benefit of the market
Mecallians, the French mechanical industries
Our 115 standardization committees
European and international leadership
Maintenance agencies
UNM and the European “Machinery” Regulation
NF EN ISO 4545-1 Matériaux métalliques – Essai de dureté Knoop – Partie 1 : Méthode d’essai
Série NF EN ISO 4545 Dureté Knoop appliquée aux matériaux métalliques