Summary: .X-Ray micro-computed tomography (micro-CT) of a nodular cast iron sample class GGG40, including both raw projection data and the final reconstructions, for three different resolutions (voxel sizes of 1 μm, 3 μm and 11 μm). .The 3D image was generated with an X-Ray micro-CT Scanner version Xradia Versa 510 from Zeiss performed by A Pereira at the UFF micro-CT Facility. .For use of these data, please remember to cite the DOI of the Zenodo repository and relevant papers. Details: .Tomo1 (1024) - Voxel size: 1 μm; Sample-source: 26 mm; Sample-detector: 150 mm; Optical magnification: 4.0X; Filter: HE#6; Beam energy: 160 kV; Power: 10 W; Exposure time: 60.0 sec; Projections: 1600. .Tomo2 (1024) - Voxel size: 3 μm; Sample-source: 28 mm; Sample-detector: 35 mm; Optical magnification: 4.0X; Filter: HE#4; Beam energy: 160 kV; Power: 10 W; Exposure time: 10.0 sec; Projections: 3200. .Tomo3 (1024) - Voxel size: 11 μm; Sample-source: 30 mm; Sample-detector: 158 mm; Optical magnification: 0.4X; Filter: HE#4; Beam energy: 160 kV; Power: 10 W; Exposure time: 3.0 sec; Projections: 3200. Contents: ._info_ds-uct-001.txt .ds-uct-001_cast_iron_ggg40_01um_8bits.zip .ds-uct-001_cast_iron_ggg40_03um_8bits.zip .ds-uct-001_cast_iron_ggg40_11um_8bits.zip .ds-uct-001_cast_iron_ggg40_01um_1600p.txrm .ds-uct-001_cast_iron_ggg40_01um_1600p_Drift.txrm .ds-uct-001_cast_iron_ggg40_01um_1600p_recon.txm .ds-uct-001_cast_iron_ggg40_03um_3200p.txrm .ds-uct-001_cast_iron_ggg40_03um_3200p_Drift.txrm .ds-uct-001_cast_iron_ggg40_03um_3200p_recon.txm .ds-uct-001_cast_iron_ggg40_11um_3200p.txrm .ds-uct-001_cast_iron_ggg40_11um_3200p_Drift.txrm .ds-uct-001_cast_iron_ggg40_11um_3200p_recon.txm