Spire Project: Work Package 2 (WP2): Metallurgy before irradiation: Deliverable 4: European Commission-5th Framework program Spire-Contract N FIS5-1999-00223

9Crimo (EM-10) and 9Crimonbv (T-91) Steels have been investigated by microstructural characterisation and mechanical properties optical microscopy, sem, tem in thin foils, EDS-TEM analysis in carbon extraction replicas and XRD analysis in phase extraction residues have been carried out in both materials. Quantitative analysis were undertaken to determine the width of the martensite laths/sub grains and the size and distribution of the carbide and carbonitride precipitates, tensile test, impact test with standard and miniature specimens, fracture toughness and small punch test were performed on the EM-10 Steel, and creep test on the T-91 Steel. (Author)