DS EN 3161:2007 Aerospace Series - Steel Fe-Pm3801 (X5crnicu17-4) - Air Melted, Solution Treated And Precipitation Treated, Bar A Or D <= 200 Mm - R[M] >= 930 Mpa Describes the requirements relating to: Steel FE-PM3801 (X5CrNiCu17-4) - Air melted, solution treated and precipitation treated, bar a or D <= 200 mm - R[m] >= 930 MPa, for aerospace applications.