DS EN 3490:2007 Aerospace Series - Steel Fe-Pm3901 (X15crni17-3) - Air Melted - Hardened And Tempered - Bar For Machining - D[E] <= 200 Mm - 900 Mpa <= R[M] <= 1100 Mpa Describes the requirements relating to: Steel FE-PM3901 (X15CrNi17-3) - Air melted - Hardened and tempered - Bar for machining - D[e] <= 200 mm - 900 MPa <= R[m] <= 1100 MPa for aerospace applications