It is generally accepted that austenitic steels (fcc) show no ferromagnetic signature. However, thermomagnetic measurements suggest an unexpected ferromagnetic transition (Tc = 600C after cooling the sample from T>800C) in 17-4 PH stainless steel (Fe-Cr-Ni-Cu) despite this steel being in its austenitic phase. We wish to use neutron diffraction to confirm, or refute, suggestions that ferromagnetic correlations exist in the austenite phase of 17 4 PH steel. We plan to examine one sample of 17-4 PH steel which will be heated to T>800C and then cooled to room temperature. Diffraction patterns will be collected upon both cooling and heating, allowing us to detect phase transformations and magnetic transitions. Evidence for strongly ferromagnetic austenite could allow development of new stainless steels which are easier to recycle using the conventional magnetic separation processes.