The Subcommittee covers the following topics:

• Realisation of primary hardness scales traceable to the SI units and their dissemination
• Organisation, registration and approval of comparisons of hardness scales and indenters
• Harmonisation, review and acceptance of CMCs
• Research cooperation, in particular in the European Partnership on Metrology projects
• Development of methods and guides for uncertainty evaluation
• Cooperation in knowledge exchange, capacity building and training
• Liaison among international organisations in the field of hardness
• Strategic planning for hardness measurements