Residual stresses have been measured in green bodies after conventional compaction at 400 and 530 MPa and after high speed compaction with impact energies of 1400J and. 2200J. The former were rectangular bars and the latter cylinders. The stresses have been measured by X-ray and neutron diffraction. The full width half maximum peak widths were also recorded. :ft was found that all surfaces had compressive residual stresses in the range 5 to 90 MPa, the largest values found on side surfaces that had been deformed in shear during ejection from the die. The presence of lubricant reduces the residual stress values. The powders were basically water atomised iron powder: Hoganas ASC 100.29, Distalloy AE and Pasc.